Hydrofoil

 

(57) Abstract:

Usage: the invention relates to shipbuilding and can be used in the design of hydrofoils. The essence of the invention is that the hydrofoil includes a housing with a lifting wing device comprising a split feed underwater wing with struts, and the axis of rotation for each half of the split aft of the wing attached to the body to turn each half of the split aft wing during its ascent along the vessel, and nasal scuba wing made a solid end sections along the span, each half of the split aft of the wing is made in the form of a moving wing with negative longitudinal sweep and positive transverse V - imagery, and the number of counters is equal to two. In addition, the ends of the nose of the wing is made with a negative angle to the longitudinal sweep and with a positive angle of transverse V - shaped, whereas the fore wing is connected to the housing more than one enclosure. 1 C.p. f-crystals, 13 ill.

The invention relates to shipbuilding and can be used in the design of hydrofoils.

split feed underwater wing with struts, and the axis of rotation for each half of the split aft of the wing attached to the housing for lifting each half of the split aft of the wing and nose underwater wing made a solid end sections along the span /Year P. Zlobin and other hydrofoils and hovercraft. L. Shipbuilding, 1976, S. 103-104, Fig. 48/.

However, this ship has a low performance because of the increased dimensions wing device width.

The technical result from implementation of this invention is to improve the operational qualities of the ship hydrofoil by reducing the size of its wing device width.

This technical result is achieved by hydrofoil includes a housing with a lifting wing device comprising a split feed underwater wing with struts, and the axis of rotation for each half of the split aft of the wing attached to the body to turn each half of the split aft of the wing during its ascent along the vessel, and nasal scuba wing made a solid end sections along the span, each half of the split aft of the wing is made in the form of the number of it racks is equal to two.

In addition, the ends of the nose of the wing is made with a negative angle to the longitudinal sweep and with a positive angle of transverse V - shaped, whereas the fore wing is connected to the housing more than one enclosure.

In Fig. 1 shows a side projection of the hydrofoils in the setup split aft hydrofoil in working position; Fig. 2 is the same side view of the ship when raised to the upper position of the aft wing; Fig.3 a top view of a hydrofoil ship in the setup split aft hydrofoil in its working position; Fig. 4 the same when raised to the upper position of the split feed underwater wing; Fig. 5 shows a view from the stern on a hydrofoil with a split feed underwater wing in its working position; Fig. 6 is the same view from the stern of the ship when raised to the upper position of the split feed underwater wing; Fig. 7 forage underwater wing, in axonometric projection; Fig. 8 side view of the hydrofoils in the setup of the bow hydrofoil in working position; Fig. 9 is the same side view of the ship, but when raised to the upper position of the nose underwater wing; Fig. 10 bottom view of the court is natom in the upper position the forward underwater wing; in Fig. 12 view from the nose to the vessel when the working position of the bow hydrofoil of Fig. 13 is the same view from the nose of the ship when raised to the upper position of the nose underwater wing.

To the rear of the hull 1 of the described vessel with a transom 2 through the bottom of the rack 3 and side 4 hours attached one half of the split feed underwater wing and the plane 5, crossing the water surface at an angle transverse V imagery toand putting from the median plane /BF/ at a distance L/2, as is apparent from Fig. 5. The forward edge of the plane 5 has an internal point "a" and the outer point "b" such that drawn through them conditional straight line is not found more points of the nasal edge of this plane 5, and the projection of this imaginary line to the main plane /so/ close to perpendicular to the median plane at an angle to the longitudinal sweeptohaving a negative value, as shown in Fig. 3. The bottom stand 3 and side 4 hour through aligned bushings 6 and 7 pivotally connected to the brackets 8 and 9, fixed to the body 1 hydrofoils. Swivel bushings 6 and 7 with the brackets 8 and 9 allow freedom of rotation of polovictory such rotation notional straight line between points "a" and "b", which in the working position of the wing on the figures is indicated by apbp, will occupy the top position of abbg.

If the housing 1 prevents side rack 4 to occupy the best position in its contours is a special niche 10, as shown in Fig.1, 2, 3, 4, and 7.

To the fore part of the hull with the stem 11 and the crinoline 12 through the keel of the rack 13 and the other side of the uprights 14 are attached to the nasal plane of the wing 15, side sections at the ends of the scale which intersect the water surface at an angle transverse V imagerynas shown in Fig. 12, and the projection on the base plane are at an angle to the longitudinal sweep the fore in addition tonhaving a negative value, as is apparent from Fig. 10. Keel strut 13 in the upper part can be rigidly connected to the side posts 14 by means of brackets 16, as it can be seen from Fig. 8 13. Areas of the upper side of the uprights 14 pivotally connected with the bracket 17, structurally fixed to the stem 11 so that the fore wing has a freedom of rotation around an axis located perpendicular to the median plane of the ship.

In the working and upper positions of feed is carried out at the expense of any actuator /not shown/.

When designing feed lifting wing device is set to the operating position of the moving hydrofoil with a negative angle to the longitudinal sweeptoand the distance from the median plane of L/2.

This geometry of the underwater wing justified from the viewpoint of hydrodynamics, because the dependence of the derivative of the lift coefficient for submersion Chydepending on the depth of hoimmersion of the wing, crossing the surface of the water, with negative sweep is best considered in terms of meeting the service requirements hydrofoils. This wing is also characterized by a steady flow in a wide range of angles of attack and dives. Therefore, the wing elements of the device across the surface of the water and providing longitudinal stability and the stability of the vessel, as a more rational may be recommended negative sweep. Then you can determine the scope of acceptable provisions of the wing in the top position. By varying the angle of the negative longitudinal sweep, the distance of the wing from the median plane and the position of the raised wing, based upon the best races of the "ab" to be considered as rectilinear generatrix one-sheet hyperboloid of rotation, in which the workers and the top position two of the possible. It is obvious that the axis of rotation of the lifting wing device coincides with the longitudinal axis of the hyperboloid of rotation. It coincides with the line of intersection of planes passing through the middle of apaband bpbbperpendicular to them.

In this case, relative to the axis, rigidly connected with the vessel, the coordinates of points:

and, denoting

get the canonical equation of the centerline. It can be represented by the formula:

< / BR>
Can also be removed and the inverse problem, i.e., the upper position of the underwater wing in its working position and the optimal position of the axis of rotation. Using the proposed feed lifting wing device, the angle between the axis of rotation and diametral plane of the vessel may not be limited from below by the value of the 30oC.

For example, shown in Fig. 7 of the vessel at an angle to the longitudinal wing sweep -31 angle between the axis of rotation and diametral plane of 28.5. The optimization in this case is also expanding due to the fact that the axis of rotation is not necessarily in the plane of the deck, as the closest Ana is nstein to support the bottom of the rack behind the transom of the vessel, you can find the position of the bracket side stand on the case, in which the optimum elongation of the underwater wing, and to resolve the inevitable load in the rack and the mechanism of rotation near the axis of rotation by increasing the distance between the supports of the bottom and feed racks.

In relation to nasal lifting wing device is used the possibility to provide the optimal combination of the shape of the forward portion of the hull 1 of the vessel and the distribution of the angles opposite longitudinal sweep swing plane 15 to position it in the desired proximity to the forward part of the housing 1 at the upper position of the wing, as shown in Fig. 9, 11 and 13.

When mooring, to protect the nose of the wing can be used crinoline 12, also called the bow transom, as is seen in the same Fig.9, 11 and 13. The size of the crinoline in this case is close to the universal and does not appreciably affect the size of the ship.

The axis of rotation of the nose lifting wing device is located perpendicular to the median plane of the ship. Keel strut 13 may have its pivot bearing, and may be structurally associated with the upper parts of the side racks perelstein on the stem 11 of the housing 1 so, to top position fore wing took the optimum position.

1. Hydrofoil, comprising a housing with a lifting wing device comprising a split feed underwater wing with struts, and the axis of rotation for each half of the split aft of the wing attached to the body to turn each half of the split aft of the wing during its ascent along the vessel, and nasal scuba wing made a solid end sections along the span, characterized in that each half of the split aft of the wing is made in the form of a moving wing with negative longitudinal sweep and positive transverse V-imagery, and the number of counters is equal to two.

2. Vessel under item 1, characterized in that the ends of the nose of the wing is made with a negative angle to the longitudinal sweep and with a positive angle of transverse V-shaped, whereas the fore wing is connected to the housing more than one enclosure.

 

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