Abstract: The three-dimensional compressible, Reynolds-averaged Navier-Stokes equations with Spalart-Allmaras algebraic turbulence model were solved using the third order accurate MUSCL type TVD (total variation diminishing) scheme. The underexpanded jets from inclined nozzle under two kinds of inclination angle and nozzle pressure ratios of 2.2, 2.8, 3.4 and 4.0 were simulated numerically. The jet flowfield and flow parameter distributions were obtained. The numerical results agree well with experimental data. The distribution curves of the inclination angle of nozzle exit plane and nozzle pressure ratios on the jet deflection angle and divergence angle were given as well.

Key words: Inclined nozzle~+;Supersonic jet flow;Navier-Stokes equation;Turbulence model;Numerical simulation

摘要： 采用三阶MUSCLTVD格式解三维可压缩平均雷诺纳维尔 斯托克斯方程组,湍流模型为Spalart Allmaras代数模型,数值模拟了两种斜切角喷管在喷口压比为2 0,2 8,3 4和4 0条件下的欠膨胀超声速射流场,获得了射流场流谱和参数分布,计算结果和实验数据符合良好,并给出了喷管斜切角和喷口压强比与射流偏转角和扩张角的分布曲线。

关键词: 斜切喷管+;超音速射流;纳维尔斯托克斯方程;湍流模型;数值仿真