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从雷诺平均的非定常Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程出发，利用时间相关法，采用ＭａｃＣｏｒｍａｃｋ两步显格式，结合Ｂａｌｄｗｉｎ－Ｌｏｍａｘ代数湍流模型，数值模拟了高空台扩压器的内部流场，并计算了扩压器的性能。结果表明，采用求解Ｎ－Ｓ方程的方法计算高空台扩压器性能是一种有效的方法。
Based on the Reynolds-averaged unsteady Navier-Stokes equations, the time-dependent method was used to simulate the internal flow field of the diffuser with the Baldwin-Lomax algebraic turbulence model by MacCormack two-step format. Performance of the device. The results show that it is an effective method to calculate the performance of diffuser at high altitude using the method of solving N-S equation.