Abstract:
The results of mathematical modeling of dynamic processes in nozzles with adjustable minimum cross-sectional area are given. Calculations of spatial gas dynamics at different degrees of opening of the nozzle were made. To describe the flow was used the model of viscous compressible gas in the form of the Navier - Stokes, Reynolds averaged using the two-parameter model of turbulence SST. The air was selected as the working fluid for comparison with experimental data. The flow coefficients that take into account the multidimensional and uneven flow at the minimum section were calculated. Comparison with experimental data shows that the mathematical model adequately describes the gas-dynamic processes in the nozzle with adjustable minimum cross-sectional area.
Keywords:nozzle, three-dimensional gaz dynamics, flow coefficient, method of calculation.
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