关键词: 纳维尔－斯托克斯方程;喷管气流;湍流射流;流动分布;数值模拟;数值计算

Abstract: The internal flow field and the flow jet field in a convergent nozzle are simulated based on Renolds-average unsteady Navier-Stokes equations, with time-dependent method, flux vector splitting technique in implicit Beam-Warming scheme and Baldwin-Lomax algebraical turbulent model. A transonic flow field in a nozzle under supercritical operation condition is numerically computated, which demonstrates that the results in this paper are in good agreement with experimental data.

Key words: Navier-Stokes equation;Nozzle gas flow;Turbulent jet;Flow distribution;Numerical simulation;Numerical calculation