Experimental and calculated dependences of the coefficient expiration of the three types of end diaphragms were obtained in the range of Reynolds numbers Re=2,5´10 4 - 4´10 5 and the relative diameter diaphragm b=0,4 – 0,75. The experiments were performed on a reference installation of FGUP VNIIR. The discharge coefficient of end diaphragm was calculated on the basis of numerical solutions of equations for stationary turbulent flow of an incompressible fluid. To achieve greater accuracy in the calculation with the use of models of turbulence k-e RNG and k-w SST constant modification of a standard set of models was held. The analysis of the equation for the discharge coefficient was held and it is shown that the determining influence on the discharge coefficient have only narrowing jet and hydraulic losses coefficients.
Торцевая диафрагма, коэффициент истечения, эталонная установка, математическое моделирование, модели турбулентности, коэффициент сужения струи, коэффициент гидравлических потерь, End diaphragm, discharge coefficient, reference installation, mathematical modeling, turbulence model, the coefficient of narrowing jet, the coefficient of hydraulic losses
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