NASA低速离心压气机时轮内部流动的数值研究

NUMERICLE STUDY OF THE FLOW INSIDE THE NASA 'S LOW-SPEED CENTRIFUGAL COMPRESSOR IMPELLER

本文采用一多功能流体动力学计算软件，详细计算分析了ＮＡＳＡ低速离心压气机叶轮内部的三维速度场。通过 与实验数据以及其它软件计算结果详细定量的对比分析，研究了ＣＦＤ软件预测叶轮内部流场的能力及存在的问题，提出 了进一步提高数值计算精度的建议。

Based on a multifunctional CFD software, the three-dimensional velocity field within the impeller of NASA low-speed centrifugal compressor is computed in detail in this paper. Detailed quantitative analysis is then carried out through comparing the results with experimental data as well as the results from another CFD software. Moreover, the ability of CFD software to predict the flow field inside the impeller and the existing problems are studied. Suggestions are given to further improve numerical computation precision.