Dissipating device of water flow
SUBSTANCE: dissipating device comprises a stilling basin 2, located between the supply pressure conduit 1 and discharging channel 19. In stilling basin 2 there is chamber 3 designed of two broken inclined cantilever walls 4 and 5 fastened to the side walls of the basin 2. Slots 12, 13 are left between the basin bottom 2 and lower ends of the walls 4 and 5. Additional nozzle 6 is located inside the chamber 2. Additional nozzle 6 is made of two guide plates 7, 8 coaxially to pyramidal threshold 9, mounted on the bottom of chamber 2. Slots 10, 11 are made in the upper part in plane of their symmetry relative to each other between the walls 4, 5 and plates 7, 8. Basin 2 is provided with vertical overflow wall 16. The lower end of the wall 16 is provided with grid connected with basin in the form of perforated pipes 17.
EFFECT: reliability and efficiency of device operation are increased, dynamic effect on the wall is reduced and uniformity of distribution of specific flow rates across the width of the basin is improved.
2 cl, 1 dwg
The invention relates to hydraulic engineering and can be used for energy dissipation in the downstream tubular culverts and end devices closed tubular tunnel culvert.
Known quencher energy flow with inlet pipe entering the casing, made in the form of a truncated cone, the surface of which is perforated (USSR Author's certificate No. 1036835, CL EV 8/06, 1983).
The disadvantage of this damper is that it works effectively when skipping optimal flow, if the flow rate is above or below the optimum, the efficiency and reliability of the damper is reduced, so that the jet flowing through the perforations in the casing, there is little change the direction of flow, and consequently, the collision of their ineffective dampens the energy of the flow. In addition, it does not eliminate clogging debris conduit. As a result of this reduced reactive impact through a perforation on the water flow, i.e. clogged. As a result, the collision of jets is also violated, changing the living section of the perforated discharge pipe.
Closest to the proposed appointment of technical essence and the achieved result is the quencher energy flow for tubular discharge, including mounted horizontally in the water well pipe cap with a hole the threads in the side walls and the reflector on the end, the headstall made in the form of a widening of a truncated cone and provided with expanding swirl of water flow is established at the beginning of the end, and apertures in the side walls of the cap is made in the form of a transverse slit perforation, and water well is made in the form of a truncated semicircle, the angle of taper which is equal to or greater than the angle of the taper of the tip, and the reflector is made in the form of annular trapezoidal plate with concentric holes, with a transverse slit perforation in the side walls of the cap is made with square holes, increasing to its end (USSR Author's certificate No. 1435690, CL EV 8/06, 1988).
The disadvantage of this damper is that it works effectively when skipping optimal flow, if the flow rate is above or below the optimum, the efficiency and reliability of the damper is reduced, as consumption in end plate under high pressure straight through apertures directed immediately by the length of the well (straightness), which causes the wave phenomena in the discharge channel and scour it, i.e. not using the internal volume water well to absorb water energy, because otherwise it is necessary to extend the size of the well is the appreciation of the building as a whole. Design output castigates sensitive to the presence in the water flow of the ice, garbage and long items that can put out of action.
The purpose of the invention is to increase reliability by increasing the efficiency of the clearing.
This goal is achieved by the fact that the damper energy of water flow, including water well, located between the inlet and the discharge conduit and the discharge channel, a reflector in the form of walls and holes, water well contains a chamber made of partitions in a console broken walls forming the discharge gap, and has in the centre at the bottom of the pyramid threshold, in addition, has established in its internal cavity of additional attachments, made in the form of guide walls located in their plane of symmetry of the walls relative to each other and directed in the direction of pyramidal threshold that is located coaxially in the chamber, contains vertical overflow wall, the lower end of which is provided in communication with the well of the lattice in the form of perforated pipes, while it has installed inside the well at the side of the tailrace channel of the inclined wall, which, fastened to the side walls of the well.
Such design of the damper of interrelated elements will allow you to increase the intensity of the damping can suppress the kinetic energy of the flow at a smaller length of the well, and also reduce the dynamics is a mini impact on the barrier in the form of broken inclined cantilever wall forming the discharge gap. Design camera with pyramidal threshold and with the nozzle coaxially-pyramidal threshold width of the well effectively uses the feature of hydraulic flow patterns. In addition, the output stream after the camera further reduces the near-bottom velocity due to the installation of the retaining overflow wall with grill made in the form of perforated pipes in the bottom. Having poured through the upper edge of the wall, the flow, getting in the end part of the well formed by an inclined wall, which, fastened to the side of its walls, smoothes the surface of the water movement after wall. In this connection there is full utilization of the volume of the well to absorb energy of water flow, the design of the damper has been simplified, which reduces the length of the mounting of the discharge channel and to increase the reliability of structures by expanding the range of effective quenching of excess energy flow.
The drawing schematically shows a quencher energy of water flow, General view.
The energy absorber water flow includes a conduit 1 for the supply of flux to the wall of the well 2. Rectangular pit 2 is equipped with a recessed below the level of the camera 3, consisting of two broken inclined cantilever walls 4 and 5, secured to the side walls of the well 2. Moreover, the additional nozzles 6 are also made of two guide walls 7 and 8, located inside the chamber to form the upper ends of the walls 4 and 5, and in the chamber 3, which is fixed on the bottom of the pyramidal threshold 9, are placed coaxially with the nozzle 6. Between the walls 4 and 5 and the guide walls 7 and 8 in the upper part is made of longitudinal slots 10 and 11 in the plane of symmetry of their relation to each other, and between the bottom of the well 2 and the lower ends of the walls 4 and 5 left slits 12 and 13. Before the output threshold 14 with a horizontal shelf 15 of the well 2, the side walls adjacent vertical retaining wall 16 with the lattice in the form of a perforated pipe 17, which is the fence, secured at one end to the bottom edge of the wall 16 and the bottom 18 of the well 2. For the purpose of smoothing the surface movement of water after overflow wall 16 in the well 2 to its side walls secured at an angle to the side of tailrace channel 19 hatchback, which the wall 20. Well 2 in the area of the camera 3 and the nozzles 6 are topped with a slab 21.
The damper energy of the water flow works as follows.
Pressure flow passing through the horizontal section of conduit 1, enters the water well 2. Water jet hits the wall 4, undergoes a change of direction of water splitting and the collision of the jets of water flowing in the absorber of energy. In this part of the well is difficult back the movement of water. At the same time one jet is directed upwards in the slot 10, and the other in the slot 12, and is guided by a wall 4. The interaction of jets flow through slots 10 and 12 leads to the formation of the total flow in the chamber 3, which is placed at the bottom of the pyramid threshold 9. After that, the flow of water moves through the slit holes 11 and 13 formed by the wall 5 and the partition 8. On the output side of the well 2 is afflux of water retaining overflow cantilever wall 16 and with the lattice in the form of a perforated pipe 17, which is the intake. As a result, the water level rises in front of the camera 3 and the iridescent layer of water is pressed and smoothes the surface of the water movement after wall 16, and the presence of reverse current before the output threshold 14 additionally reduces the near-bottom velocity over him, ultimately creating superficial water movement after quencher energy, improving hydraulic conditions tailrace channel 19.
This embodiment of the energy absorber water flow extends the range of effective quenching of excess energy flow and increases the reliability of the structure. Thanks to the capabilities of your camera and attachment with broken sloping walls and partitions, perceiving dynamic load, reduces the effect of this load on the elements of the device and the damper as a whole. Simplified design the device, resulting in reduced costs for its production.
1. The damper energy of water flow, including water well, located between the inlet and the discharge conduit and the discharge channel, a reflector in the form of walls and openings, characterized in that to increase reliability by increasing the efficiency of quenching water well contains a chamber made of partitions in a console broken walls forming the discharge gap, and has in the centre at the bottom of the pyramid threshold, in addition, has established in its internal cavity of additional attachments, made in the form of guide walls located in the symmetry plane of the walls relative to each other and directed in the direction of pyramidal threshold set coaxially in the chamber, contains a vertical overflow wall, the lower end of which is provided in communication with the well of the lattice in the form of perforated pipes.
2. The damper according to claim 1, characterized in that it has installed inside the well at the side of the tailrace channel of the inclined wall, which, fastened to the side walls of the well.
SUBSTANCE: invention relates to hydraulic engineering, namely, to channels used in water-engineering systems and irrigation systems as open spillway structures. The method includes erection of a channel of polygonal profile with two pairs of symmetrical slopes and a triangular base. Reinforced concrete anchor beams 1 are laid into a single longitudinal row along the top of the triangular base. At the left and right to these beams they fix gabion mats 2, laid across the riverbed along the line of bottom slopes m2. Gabion mats 2 are made of light fascines and perforated pipes laid in layers into a metal net. Along the line of side slopes m1 in tight rows they lay flexible mats 3, made from light fascines, wrapped into a geonet of tubular shape. Gabion 2 and flexible 3 mats are tied to each other with the help of a metal wire and in some points are attached to slopes of the channel with the help of reinforcement rods 4. The method may be most efficiently used in low-head dam and dam-free water-engineering systems, and also a manifold irrigation network in piedmont and mountain hard-to-access areas.
EFFECT: channel of polygonal profile, erected by the proposed method, turns into a reliable spillway or coupling structure of open type, designed for safe passage or discharge of maximum possible water flows.
SUBSTANCE: energy dissipator comprises a horizontal section of a water conduit 1 and a circular dissipation chamber 3. The chamber 3 is equipped with a vibratory screen 9, placed coaxially to the hole of a vertical inlet nozzle 2, installed in the end of the water conduit 1. The vibratory screen 9 is made of spherical shape with convexity upwards with a circular support in the form of a disc 10, interacting as capable of vertical movement with ledges-limiters 7 and 8 in the upper position, and in the lower - with ledges-limiters 5 and 6, fixed on the flat bottom 4 of the chamber 3. The vibratory screen 9 has stands 11 and 12, equipped with springs 13, 14 and made in the form of guide adjustment bolts with fixed nuts 15, 16. In the centre of the flat bottom 4 of the chamber 3 there is a vertical outlet nozzle 17, which is placed in a discharge header 26 with a drain pipeline 27.
EFFECT: higher efficiency of operation under condition of variable water level in a dissipation chamber.
3 cl, 3 dwg
SUBSTANCE: dissipating device comprises a flow conduit 1 with shoulder 2 in the annular chamber 3, conjugated with the additional square chamber 4. Dissipating chamber 3 is provided with longitudinal walls 5, attached on the bottom by the additional rectangular dissipating chamber 4 in the form of two vertical water escape separating walls parallel to its walls, and at the outlet section of annular chamber - convergently at an angle to one another. The upper end of walls 5 of confuser has wall 16 radially incurved, mounted with gap to opposite free gap between the sidewalls of chamber 3. The lower end of vertical baffles 5 to the side of tailrace channel 15 is located in front of the flushing gallery 8 with transition curvilinear walls 9, located over the side walls of gallery 8 and interfaced with output threshold 12 of gallery 8. The output threshold 12 is located above the chamber 4 bottom and designed with horizontal shelf 14 and coupled with bottom of tailrace channel 15. The bottom of gallery 8 is coupled with pipeline 10 with plain gate 11 through the opening. Due to collision of jets in chambers 3 and 4 at sites: drop, curvilineal walls curved radially, overflow through the walls, as well as generation of water flow occurs in gallery in front of output threshold 12, energy dissipation is provided, reduction of bottom velocities at outlet and smooth entry into the tailrace channel are achieved. Performance of flushing gallery with threshold with horizontal shelf permits to create helical motion in it, friction between the flow layers and eliminate siltation of gallery at the same time.
EFFECT: improving work efficiency under conditions of variable water flows, increase of the device reliability.
2 cl, 2 dwg
SUBSTANCE: invention relates to hydraulic engineering. A water discharge channel includes two composite parts with symmetrical pairs of slopes, an upper one with slope gradient m1 and a bottom one with slope gradients m2, and a triangular base. On a vertex of a triangular base there laid in one longitudinal row are reinforced-concrete anchor beams 1, on the left and on the right to which gabion mattresses 2 laid across the bed along the line of bottom slopes m2 are attached. Gabion mattresses are made of light fascines and perforated tubes laid into mesh wire layer by layer. Flexible mattresses 3 made of light fascines wrapped into a geogrid of tubular shape are laid along the line of side slopes m1 in tight rows. Gabion 2 and flexible 3 mattresses are connected to each other by means of mesh wire and attached in some places to slopes of the channel by means of reinforcement bars 4. The channel of the polygonal profile of the proposed structure is converted to a reliable water discharge or conjugation structure intended for safe passage or discharge of maximum possible water consumptions. It can be used effectively as much as possible as a part of low-pressure dam and dam-free hydraulic assemblies, as well as the main irrigating network in piedmont and mountainous difficult-to-access sections.
EFFECT: improving efficiency and reliability of channel operation.
FIELD: construction, road engineering.
SUBSTANCE: invention relates to the field of hydraulic engineering. The method includes preparation and levelling of the base on the dam crest, manufacturing of reinforced concrete elements, their assembly and connection. Discharge overflow structures from prefabricated reinforced concrete elements are made using self-sealing concrete mixtures, of optimal size, for instance, along the height and length to 5.0 metres, thickness of up to 0.5 metres and weight of up to 30 tons. They connect the reinforced concrete elements to each other by speed method with the help of coupling joints 5 directly on the dam crest. The mounted reinforced concrete sections make a single water drainage front - thin-walled reinforced concrete labyrinth water drain with wall thickness of at least 15 cm.
EFFECT: higher quality and operating characteristics of reinforced concrete elements of a thin-walled labyrinth water drain with simultaneous reduction of construction time.
SUBSTANCE: damper comprises a water cushion 1, which is cone-shaped, and the upper edge 2 of which is connected to the output end of the supply pipe 3. The water cushion comprises a receiving reservoir (a jacket) 4 installed in its inner cavity and made in the form of a truncated cone, the end of which is equipped with a locking cap 5, located coaxially to the supply pipe 3. Descending parts of the cap vault are equipped with radially arranged slot cuts 6. The expanded part of the truncated cone with water outlet holes 8 has an upper edge 9 bent along the radius and connected with the upper edge 2 of the water cushion, forming a circular wall cushion with the walls. The water cushion is equipped with a drain channel 11 communicated with it and comprising a retaining structure made in the form of a curvilinear shield 12 installed hingedly on an axis 13 and comprising a canopy 14 bent downwards and submerged in the draining channel, facing towards the water cushion with the possibility of interaction between the lower edge of the canopy with a threshold 15 at the bottom of the draining channel.
EFFECT: increased reliability of structure operation by expansion of the range of efficient damping of excessive flow energy.
SUBSTANCE: water flow energy damper comprises a supply channel 1 with a cantilever 2, installed in a niche 3 of a water cushion 4, and a baffle 7, made as curvilinear in the vertical plane. The baffle is made in the form of a lock, which has a shape of a sector in the cross section, which is attached with its top to the rear wall of the water cushion by means of a hinged joint with a horizontal axis of rotation 8. In the water cushion with the niche there is a bottom gallery 5 with a flushing hole 6. The cross section of the niche 3 corresponds to the cross section of the lock 7 in the idle position (lower position). At the side of the diverting channel 11 in the base and side vertical walls of the water cushion there are stops arranged, which interact with the lock in the operating position. One of the walls of the lock facing towards the niche of the water cushion is made as vertical, and the other one - as a web of roof-like shape with a canopy and a counterweight float of cylindrical shape in its ridge part. Additionally a stop is installed in the form of a float attached to the lock wall, which is installed as capable of contacting-jointing with the rear wall of the water cushion.
EFFECT: increased efficiency of energy damping by provision of automation of baffle actuation and improved functional capabilities of a device.
3 cl, 8 dwg
SUBSTANCE: energy damper comprises an underwater pipe, a conical expanding water conduit, where a flow swirler and a reflector with holes are installed. It also comprises a vertical chamber in the form of a truncated cone installed in the well with the expanding part downwards coaxially to the nozzle, with the possibility to enclose the flow swirler and of fixed movement relative to the nozzle. The side wall of the chamber is arranged with a curvilinear surface in direction of flow movement towards water discharge windows in the place of adjacency of the external nozzle wall to them.
EFFECT: higher efficiency and reliability of device operation, reduced hydrostatic effect at a flow swirler.
4 cl, 2 dwg
SUBSTANCE: vortex spillway includes a flow swirling device and a discharge water conduit. The output portal of the spillway with discharge of the swirled flow into atmosphere is equipped with a jet-directing deflector made in the form of a slant or figured cut of the output section of the discharge water conduit. The fan shape of the free jet during discharge of the swirled flow into atmosphere aids its efficient aeration and spraying in air, and also larger length of the line of coupling of the discharged jet with the bottom of the lower reach.
EFFECT: prevention of formation of substantial plunge basins, higher reliability and safety of spillway and water-retaining structures.
SUBSTANCE: mudflow straight tray comprises symmetrical monolithic reinforced concrete walls 1 and a split bottom. Walls of the tray 1 have cantilever parts, arranged at the angle α to the horizontal plane of the bottom. Cantilever parts of the walls 1 are loaded with a material of the bottom part of the tray. The tray bottom is made from a rock fragment material 3 and gabion structures 2. Gabions 2 are fixed to tray walls with the help of anchor joints 4.
EFFECT: improved operational reliability.
FIELD: hydraulic engineering, particularly automatic spillways arranged in upper pool of waterworks facility.
SUBSTANCE: spillway includes water drain funnel with full annular water drainage as viewed from above, transition part with elbow in lower part and branch pipe adjoining transition part. Drain funnel defines dodecagon in plane. Four faces of dodecagon forming two orthogonal pairs are oriented in parallel to longitudinal and transversal branch pipe axes. Elbow is of rectangular cross-section. Transition part end abutting elbow is of square cross-section with length of square side equal or less than that of elbow cross-section side. Side surface of transition part includes 12 cylindrical sections. Four sections having generator lines oriented in the single direction with branch pipe exes are trapezoidal in plane. Remainder 8 sections are triangular in plane.
EFFECT: simplified structure and increased economy for spillway erection.
FIELD: hydraulic engineering.
SUBSTANCE: transition member to connect inclined supplying chute having cross-section defined by broken contour, namely rectangular or trapezoid one, with outlet hillside pipe having circular or elliptical cross-section comprises convergent part with flat bottom and broken side walls and transition part arranged between convergent part and inlet end of hillside pipe. Transition part length is 1-2 diameters of pipe to be connected. Side surfaces and bottom of the transition part are formed in subjection to supplying flow parameters and dimensions of components to be connected.
EFFECT: prevention of undulation, increased reliability and reduced cost of hillside pipe laying.
FIELD: agriculture, in particular, gully erosion preventing equipment, which may be used as hydraulic structure for suppressing energy of falling water.
SUBSTANCE: apparatus has overhanging overfall formed as converging chute with branch pipe formed as crank and fixed at rear converged end of chute. Round opening of branch pipe is directed downward. Energy suppressor positioned under round opening in water splitting pit is formed as floating sphere connected with anchor post fixed in water splitting pit bottom by means of rope and adapted for self-centering under the action of stream flow. Guiding posts-tree cuttings are planted around sphere at distance making 0.5 of its diameter. Diameter of sphere exceeds that of outlet opening of branch pipe by more than three times. Sphere and overhanging overfall are of black color. Sphere may have conical lower part.
EFFECT: increased efficiency in controlling of gully erosion and wider operating capabilities.
5 cl, 3 dwg
FIELD: hydraulic engineering, particularly connecting structure to prevent river or channel bottom erosion.
SUBSTANCE: structure comprises inlet, spillway and outlet, namely water apron, parts. The structure is flexible and made as a single whole. The structure comprises composite weir with ridge made of metal channel bar, flexible ferroconcrete upstream apron abutting upon the channel bar from upstream structure side and ferroconcrete downstream apron abutting upon the channel bar from downstream structure side. Upstream apron comprises mesh grid covered with high-strength concrete. Downstream apron is composed of one or two layers of mesh grid covered with high-strength concrete. Flexible ferroconcrete upstream apron is connected to weir at higher location than downstream one. The structure edges may be embedded in abutment. Ferroconcrete upstream or downstream aprons may be covered with wear-resistant material of natural stone or concrete panels. Ferroconcrete upstream apron may be deepened in direction from weir body. Ferroconcrete downstream apron may have reverse slope in direction away from weir body.
EFFECT: increased structure strength and resistance, reduced cost and labor inputs for structure erection.
5 cl, 7 dwg
FIELD: hydraulic structures, particularly shore opened self-acted appurtenant spillaway structures adapted for flood water discharge.
SUBSTANCE: spillaway structure comprises head discharge part, water offtake channel and end part for mating pools. End part is provided with outlets arranged in side walls transversely to coarse valley. The last in flow direction outlet has triangular cross-section. Common front of water outlets is determined from provision of estimated flow distribution over slope with velocity preventing washing-away vegetative cover from valley slope.
EFFECT: increased reliability of protection against flood water, decreased damage of hydraulic structures and environment, reduced cost of hydraulic structure erection due to expending money only for performing earthworks.
FIELD: erosion control devices for road, hydraulic and irrigation and drainage construction.
SUBSTANCE: device comprises member to protect piers from local erosion which may move along the pier as total erosion develops. The member has curvilinear side walls provided with splitter enclosing the structure from both sides and made as a single while with immovable false bottom of artificial material so that entrapped flow part may be restricted in the region upstream of midlength pier section and may be expanded in the region between midlength pier section and end section. False bottom has transversal cross-sections with in inclinations to plane of symmetry. The cross-sections pass into ones having zero transversal inclination to plane of symmetry in midlength pier section. Below midlength section part of false bottom surface is symmetric to upper one. Side walls of false bottom are created in accordance with above relations, where yj=yj(X) - current transversal coordinate of curvilinear side wall, zj=zj(x) - current vertical coordinate: when 0≤x≤1; yj(x)=b[1+x5(B/b-1)(21-35x+15x2)], when 1≤x≤2; yj(x)=B[1+(x-1)5(B/b-1)[21-35(x-1)+15(x-1)2]], x=X/X0, z(x)=z0-i0x, ; u·Δz·Δy = u0·Δz0·Δy0, ;
in=(∂z/∂y)(∂y/∂x)-(d2y/dx2)/(((∂2z/∂x2)/((∂y/∂x)2)+(∂z/∂x)2))+1/(u2/gX0)), here X is dimensional longitudinal coordinate, X0 - half of the area, x is dimensionless coordinate; B in initial width, b is width in midlength pier section, yj(x) is bottom streamline map, z(x) is longitudinal profile of border streamline; zbottom(x)=Z(x)-h, i0 is longitudinal water channel bottom inclination; in is transversal false bottom inclination; h is current flow depth in vertical direction; H is initial depth of approach flow; u0 is current velocity in initial section; u is current velocity in arbitrary point; Ψ =10 - number of calculation layers of flow part.
EFFECT: decreased costs, increased safety and operational reliability of the structures.
FIELD: hydraulic structures, particularly culvert spillaways to discharge flood water.
SUBSTANCE: spillaway comprises main tube with inlet and outlet heads. Main tube, inlet and outlet heads are formed of equal-diameter tubes. Main tube is provided with compensating hinges arranged in areas of inclination and outer load change. Main tube also has unit to connect spillaway tube with impervious member of the dam. Inlet and outlet heads are closed with caps from ends thereof and have slot-like water inlet and outlet orifices. Outlet head tube of the spillaway is laid above low water level in lower pool.
EFFECT: increased operational convenience and reduced construction and operational costs.
FIELD: hydraulic engineering, particularly interface structures adapted to prevent river or channel bottom erosion.
SUBSTANCE: method involves erecting weir, downstream apron and upstream apron. First of all composite weir is assembled on prepared base. The weir is composed of previously prepared blocks which are placed one near another and joined by embedded members. The embedded members are pressed one to another and tied up with connection wire with the use of twisting key. Weir ridge is reinforced with metal channel bar. Then woven nets unwound from rolls are connected to weir block hinges from downstream weir side. The woven nets are connected one to another to form integral mat. High-strength concrete is laid on the mat to form reinforced concrete downstream apron. Vertical piers are installed from structure sides and woven nets are connected to hinges of pier blocks from upstream side thereof. The nets are unwound from reels along river bed and connected one to another to form integral mat. The mat is coated with high-strength concrete to form reinforced concrete upstream apron. Number of woven net to be laid from lower weir side may be more than one. Space between weir blocks may be filled with sealant to create deformable joins.
EFFECT: increased structural strength and operational reliability, reduced labor inputs.
3 cl, 10 dwg
FIELD: hydraulic structures, particularly hydrosystem spillway structures adapted to reduce kinetic energy of falling flow and to protect lower pool against erosion.
SUBSTANCE: flow spreading hump comprises hump member and splitting member. End of horizontal hump part is made as projected chutes having rectangular cross-sections. The splitting member is made as a plate laid on the chutes and having cuts in front part thereof. The cuts are in register with the chutes. Angle of splitting member installation relative horizontal hump part is 21°. Rear part of splitting member may have curvilinear contour mating projected part of the hump.
EFFECT: increased kinetic flow energy reduction due to possibility to split the flow in vertical and horizontal directions into jets and provision of mutual jet impingement.
3 cl, 2 dwg
FIELD: hydraulic structure, particularly fish passing structures adapted to permit broad fish passage through support structures to fish hatchery and growth areas.
SUBSTANCE: fish passing channel comprises waterway having head connected to upper hydrosystem pool and mouth part communicated with lower hydrosystem pool, roughness members and natural flora arranged in layers in floodplain and bed parts of transversal channel section. Waterway is made as channel with polygonal transversal section. Waterway channel has different cross-sections alternating along channel length. Bed channel part is located along central longitudinal part thereof, floodplain channel parts extend along channel banks and made as curvilinear segments in plan view. When working water flow passes main flow part flows through waterway bed part and cooperates with remainder flow part, which flows along floodplain waterway parts formed in convex channel bank areas. Secondary vortex flows with vertical axis of rotation are created in floodplain waterway parts and have flow directions opposite to that of main flow part.
EFFECT: increased efficiency of kinetic flow dissipation and reduced length thereof.
13 cl, 34 dwg