轴对称超临界粘性喷流的数值模拟

NUMERICAL SIMULATION OF AXISYMMETRICAL SUPERCRITICAL VISCOUS NOZZLE JET FLOW

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

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

摘要:

从雷诺平均的非定常Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程出发，利用时间相关法，采用隐式的ＢｅａｍＷａｒｍｉｎｇ格式中的矢通量分裂技术，结合Ｂａｌｄｗｉｎ－Ｌｏｍａｘ代数湍流模型，数值模拟了收敛喷管的内流场和喷射流场。通过对超临界工况下喷管跨音速流场的数值计算，表明本文的结果与试验结果是吻合的。

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.