# Dispensing chamber

FIELD: machine building.

SUBSTANCE: dispensing chamber (5) is limited from outside by body (3), bottom (2) and grate (6) and interconnects central supply pipe (8) and side discharge channel (1) through a clearance between bottom (2) and end-face part of central supply pipe (8). Side discharge channel (1) is shaped by body (3) and central supply pipe (8). Grate (6) is installed in side discharge channel (1), while its porosity coefficient corresponds to a range from 0.3 to 0.8. The ratio of dimensions of chamber (5) corresponds to the conditions taking into account the interrelations, first of all, of a height of dispensing chamber (5) and inner diameter of central supply pipe (8); secondly, of a height of inlet into dispensing chamber (5) and inner diameter of central supply pipe (8); thirdly, of a height of dispensing chamber (5), a height of entrance into it and inner diameter of central supply pipe (8); fourthly, of a height of dispensing (5) and a height of entrance into it, radius of the lower part of body (3), inner and outer radii of central supply pipe (8); fifthly, of a distance from bottom (2) to step (7) at body (3) accordingly with the height of dispensing chamber (5) and with a radius of the lower part of body (3), a height of entrance into dispensing chamber (5), inner radius of central supply pipe (8); sixthly, of a radius of the lower part of body (3), inner radius of central supply pipe (8) and a height of entrance into dispensing chamber (5). The dimensions of a flowpath of dispensing chamber (5) are related with its hydrodynamic characteristics by a relation taking into account the mass flow rate of the working medium through a hole of grate (4), an average mass flow rate of the working medium through it, full pressure loss at grate (4), working medium density, average velocity of the working medium in central supply pipe (8), area of cross-section of a jet of the working medium falling on grate (6) jet of the working medium, a radius of the upper part of body (3), external radius of central supply pipe (8), reference radius of grate (6) and three empiric coefficients.

EFFECT: extending functional capabilities of a device at shaping a hydrodynamic irregularity at the exit of the dispensing chamber and simplifying its design.

5 cl, 1 dwg

The invention relates to a distributing manifold systems and can be used in the intermediate heat exchangers.

Known for distributing chamber, comprising a housing and a bottom, a Central inlet pipe, a step on the housing, the tube Board and throttling the grill before it is installed in the annular channel formed by the inlet pipe and the casing [Mitenkov F. M., Golovko, V.F., Ushakov P.A. and other Design heat exchangers NPP. Under the General editorship of F. M. Mitenkov. - M.: Energoatomizdat, 1988. - P.55-58].

A disadvantage of the known device is that its running parts use additional structural element throttling lattice, which complicates the design flow of the device and does not allow to fully provide the necessary distribution of the flow rate at the outlet of the distributing chamber.

The closest technical solution to the claimed technical solution is chosen camera, comprising a housing and a bottom, a Central inlet pipe, a step on the housing, the tube Board and the guiding system devices installed in the distributing chamber [Mitenkov F. M., Golovko, V.F., Ushakov P.A. and other Design heat exchangers NPP. Under the General editorship of F. M. Mitenkov. - M.: Energoatomizdat, 1988. - P.55-58].

A disadvantage of the known device is that it protocl the th parts use additional structural element system guide plates, which complicates the design flow of the device and does not allow to fully provide the necessary distribution of the flow rate at the outlet of the distributing chamber.

The invention aims to remedy these disadvantages, namely the provision of the necessary distribution of the fluid flow at the outlet of the distributing chamber without the use of additional structural elements.

To eliminate this drawback in distributing chamber bounded on the outside by the housing, the plate and grid, connecting the Central inlet pipe and a lateral discharge channel through the gap between the bottom and the end part of the Central inlet pipe, and a lateral discharge channel formed by the housing and the Central supply pipe, and the grille is installed in the side of the discharge channel, features:

the porosity coefficient of the grating to provide in the range from 0.3 to 0.8;

- the ratio of the size seeders camera to perform in accordance with the terms and conditions, taking into account the relationship, first, the height of the distributing chamber and the inner diameter of the Central inlet pipe; secondly, the height of the entrance of the distributing chamber and the inner diameter of the Central inlet pipe; thirdly, the height of the distributing chamber, the height of the entrance and the inner diameter of the Central podvodem the second pipe; fourth, the height of the distributing chamber and the height of the entrance, the radius of the lower part of the body, inner and outer radii of the Central inlet pipe; fifthly, the distance from the bottom up to speed on the case in accordance with the height of the distributing chamber and with the radius of the bottom of the chassis, the height of the entrance of the distributing chamber, the inner radius of the Central inlet pipe; Sixthly, the radius of the lower part of the body, the inner radius of the Central inlet pipe and the height of the entrance of the distributing chamber;

- dimensions of the flow part of the dealer's camera to associate with its hydrodynamic characteristics ratio, taking into account the mass flow of the working medium through the hole lattice, the average mass flow rate of the working environment through it, a complete loss of pressure on the lattice, the density of the working environment, the average speed of the working environment in Central inlet pipe, the cross-sectional area incident on the grating of the jet of the working environment, the radius of the upper part of the housing, the outer radius of the Central inlet pipe, the current radius of the lattice and three empirical coefficient.

In private cases, the implementation of the dealer's camera features.

First, when one combined height of the distributing chamber, the distance from the bottom up to speed on the case, the radii of the upper and lower housing parts in the ratio that defines the relationship R is Smurov flowing part of the dealer's camera with its hydrodynamic characteristics, the cross-sectional area incident on the grating of the jet of the working environment to calculate the ratio, taking into account the number PI, the radii of the upper and lower parts of the body, the inner radius of the Central inlet pipe, the height of the distributing chamber and the height of the entrance.

Secondly, when a different combination of the height of the distributing chamber, the distance from the bottom up to speed on the case, the radii of the upper and lower housing parts in the ratio that defines the relationship of the sizes of the flowing part of the distributing chamber with its hydrodynamic characteristics, the cross-sectional area incident on the grating of the jet of the working environment to calculate the ratio, taking into account the number PI, the height of the distributing chamber and the height of the entrance, the distance from the bottom up to speed on the case, the radius of the lower shell and the inner radius of the Central inlet pipe.

Thirdly, when two combinations of sizes of the internal radius of the Central tube, the height of the distributing chamber and the height of the entrance and the radius of the bottom of the hull in the ratio that defines the relationship of the sizes of the flowing part of the distributing chamber with its hydrodynamic characteristics, to use an empirical coefficient depending on a complete loss of pressure on the lattice, the density of the medium, its average speed in the Central inlet pipe, two permanent empirical ratios are now.

Fourthly, the third combination of sizes of the internal radius of the Central tube, the height of the distributing chamber and the height of the entrance and the radius of the lower part of the body, in the ratio that defines the relationship of the sizes of the flowing part of the distributing chamber with its hydrodynamic characteristics, use one empirical coefficient depending on a complete loss of pressure on the lattice, the density of the working environment and its average speed in the Central inlet pipe, a constant empirical coefficient empirical coefficient depending on a complete loss of pressure on the lattice, the density of the working environment and its average speed in the Central inlet pipe, the current radius of the lattice, the outer radius the Central inlet pipe and the radius of the upper part of the body.

Longitudinal axial section of one of the variants distributing chamber is represented on the figure, where the following notation: 1 - side discharge channel; 2 - bottom; 3 - cover; 4 - hole grid; 5 - distributing chamber; 6 - grid; 7 - stage; 8 - Central inlet pipe.

The essence of the proposed technical solution is as follows.

Distributing chamber 5 is limited to outside the housing 3, the bottom 2 and the grating 6.

Distributing chamber 5 connects the Central inlet pipe 8 and a lateral discharge channel of 1 through ZAZ is p between the bottom 2 and the end part of the Central inlet pipe 8.

Side discharge channel 1 is formed by the housing 3 and the Central supply pipe 8.

The bars 6 are installed in the side of the discharge channel 1.

The porosity coefficient of the grating 6 is in a range from 0.3 to 0.8.

The ratio of the sizes of the distributing chamber 5 correspond to the conditions:

where H is the height of the distributing chamber 5, m; d_{0}- inner diameter of the Central inlet pipe 8, m; h - the height of the entrance of the distributing chamber 5, m; R=-0,05r_{0}-0,01h+0,06[(r_{0}+0,21h)^{2}+r_{1}^{2}]^{0,5}is the radius of the free surface of the jet of the working environment in the lower part of the cor the USA before the stage,
m; r_{0}the inner radius of the Central inlet pipe 8, m; r_{1}is the radius of the bottom case 5, m; h_{0}- the distance from the bottom 2 to level 7 on the housing 3, m

The sizes of the flowing part of the distributing chamber 8 is connected with its hydrodynamic characteristics in the following ratio

where M is the mass flow of the working medium through the opening 4 of the grating 6, kg/s;^{3};^{2}; r_{2}is the radius of the upper housing 3,m; R_{0}- the outer radius of the Central inlet pipe 8, m; b_{1}- empirical coefficient; l_{b}- empirical coefficient; r is the current radius of the grating 6, m; A is an empirical coefficient.

For the particular cases of the execution of the distributing chamber 5 is characterized by the following :

First, when the ratio of the flow part of the distributing chamber 5, satisfying the condition

where H is the height of the distributing chamber 5, m; h_{0}- the distance from the bottom 2 to level 7 on the housing 3, m; r_{2}is the radius of the upper housing 3, m; r_{1}is the radius of the bottom case 3, m,/p>

the cross-sectional area incident on the grating 6 jets working environment is determined by the ratio of:

where F is the cross-sectional area incident on the grating 6 jets working environment, m^{2}; π is the number PI; r_{2}is the radius of the upper housing 3, m; R=-0,05r_{0}-0,01h+0,06[(r_{0}+0,21h)^{2}+r_{1}^{2}]^{0,5}is the radius of the free surface of the jet of the working environment in the lower part of the housing 3 before step 7, m; r_{0}the inner radius of the Central inlet pipe 8, m; h - the height of the entrance of the distributing chamber 5, m; r_{1}is the radius of the bottom case 3, m; H - the height of the distributing chamber 5, m

Secondly, when the ratio of the flow part of the distributing chamber 5, satisfying the condition

where H is the height of the distributing chamber 5, m; h_{0}- the distance from the bottom 2 to level 7 on the housing 3,m; r_{2}is the radius of the upper housing 3, m; r_{1}is the radius of the bottom case 3, m,

the cross-sectional area incident on the grating 6 jets working environment is determined by the ratio of:

where F is the cross-sectional area incident on the grating 6 jets working environment, m^{2}; π is the number PI; H - the height of the distributing chamber 5, m; h_{0}- the distance from the bottom 2 to level 7 on the housing 3, m; r_{1}- R is dius of the lower shell 3,
m;

R=-0,05r_{0}-0,01h+0,06[(r_{0}+0,21h)^{2}+r_{1}^{2}]^{0,5}is the radius of the free surface of the jet of the working environment on the lower housing 3 before step 7, m; r_{0}the inner radius of the Central inlet pipe 8, m; h - the height of the entrance of the distributing chamber 5, m

Thirdly, when the ratios of the sizes of the flowing part of the distributing chamber 5 in accordance with the conditions

where R=-0,05r_{0}-0,01h+0,06[(r_{0}+0,21h)^{2}+r_{1}^{2}]^{0,5}is the radius of the free surface of the jet of the working environment on the lower housing 3 before step 7, m; H - the height of the distributing chamber 5, m; r_{1}is the radius of the bottom case 3, m, the empirical coefficients in equation (7) is equal to

b_{1}=6,5ζ^{0,48}; l_{b}=0,86 and A=0,

where b_{1}- empirical coefficient;and^{3};_{b}- empirical coefficient; And a is an empirical coefficient.

Thirdly, when the ratio of the flow part of the distributing chamber 5, satisfying the condition

where R=-0,05r_{0}-0,01h+0,06[(r_{0}+0,21h)^{2}+r_{1}^{2}]^{0,5}is the radius of the free surface of the jet of the working environment in the lower part of the housing 3 before step 7, m; H - the height of the distributing chamber 5, m; r_{1}is the radius of the bottom case 3, m,

the empirical coefficients in equation (7) is equal to

where b_{1}- empirical coefficient;and^{3}; l_{b}- empirical coefficient; A is an empirical coefficient; r is the current radius of the grating 6, m; R_{0}- outer diameter of the Central inlet pipe 8, m; r_{2}is the radius of the upper housing 3, m

Used in expressions (1÷14) denote structural elements distributing chamber 5 is presented in the figure.

Ratios for the determination of hydrodynamic non-uniformity at the output of the axisymmetric distributing chamber 5 is designed with consideration of the law of conservation of mass in the assumption of constant thermophysical properties of the working environment and the jet nature of its course.

At the conclusion of the calculated ratios adopted the following assumptions.

When moving flat half-jets along the bottom 2, after the site of its stabilization, half-ring of jets along the body (3) and circular submerged jet in distributing chamber (5) is to increase the area of their Popper is tion section accompanied by a decrease in the speed of the working environment in them. Ring of flooded stream after leaving the stage 7 in the housing 3 is converted into a circular flooded stream.

Angle unilateral extension flooded and flooded streams is 12°.

Equation (4) corresponds to the condition of contact of the inner side surface of the jet on the grid 6, equation (5) determines the relative position of the grating 6, stage 7 on the housing 3 and the place of formation as a result of rotation of the half-ring jet at the bottom of the housing 3, and the ratio of (6) corresponds to the condition of traffic flat half-jets along the middle part of the bottom 2.

During the working environment in the flowing part of the distributing chamber 5 is carried out as follows.

Released from the Central inlet pipe 8 into the input portion of the distributing chamber 5, the flow of the working fluid is converted to round the flooded stream, which is the result of turning on the bottom 2 beyond the area of its stabilization is converted to a flat half-a stream in the input part of the distributing chamber 5, moving from the center of the bottom 2 on its periphery. Then flat stranded jet after turning on the bottom of the bottom 2 is converted into a half-ring jet, which is above the level 7 on the housing 3 is converted into the free flooded structure is. When the jet hit the bars 6 one part of the fluid flow enters into the holes 4 of the grating 6, located at the meeting point of the jet, the other part of the flow spreads along the grating 6 with the change in the flow rate along the way. Then, the working medium passes the holes 4 of the grating 6 and out of her.

The use of the proposed technical solution is recommended when the Reynolds number in the Central inlet pipe Re_{1}≻2·10^{5}and the hydraulic resistance coefficient of the lattice 6ζ≻0,3.

Specific example seeders camera

Distributing chamber 6 has the following ratio: (H-h)/d_{0}=0,38; h/d_{0}=1,29; H/d_{0}=1,67; R_{0}/d_{0}=0,53; r_{1}/d_{0}=0,67; r_{2}/d_{0}=0.71 and h_{0}/d_{0}=0,93. The porosity coefficient of the grating 6 (ε) is equal to 0.24. The 4 holes in the bars 6 are ring rows. At this Reynolds number in the Central inlet pipe 8 is equal to 1.4·10^{6}. The hydraulic resistance coefficient of the grating 6 ζ=8,8.

Comparison of results of calculation by the equation (7) with the experimental data obtained for the specified design distributing chamber 5, showed that the difference in relative consumption

The technical result consists in expanding the functionality of the device during the formation of hydrodynamic non-uniformity at the exit from the distributing chamber 5 and simplifying its construction.

1. Dealer Luggage, limited outside the body, bottom and bars, connects the Central inlet pipe and a lateral discharge channel through the gap between the bottom and the end part of the Central inlet pipe, and a lateral discharge channel formed by the housing and the Central supply pipe, and the grille is installed in the side of the discharge channel, wherein the ratio of the porosity of the lattice corresponds to a range from 0.3 to 0.8, the hydraulic resistance coefficient of the grating is greater than the value of 0.3, and the ratio of the size of distributing chamber match conditions:

where

H - the height of the distributing chamber, m;

d_{0}- inner diameter of the Central inlet pipe, m;

h - the height of the entrance of the distributing chamber, m;

R=-0,05r_{0}-0,01h+0,06[(r_{0}+0,21h)^{2}+r_{1}^{2}]^{0,5}is the radius of the free surface of the jet of the working medium in the lower part of the body in front of the stage, m;

r_{0}the inner radius of the Central inlet pipe, m,

r_{1}is the radius of the lower part of the body, m;

h_{0}- the distance from the bottom up to speed on the case, m

and the sizes of the flowing part of the distributing chamber connected with its hydrodynamic characteristics in the following ratio