论文部分内容阅读
对商用CFD软件中的四种湍流模型给出的湍流空气自由射流引射特性计算结果进行了比较,并将采用四种湍流模型计算获得的射流引射量计算数据与文献报道的采用多孔壁技术获得的射流引射量实验数据进行了对比,结果表明:在四种湍流模型中,标准K-ε湍流模型给出的湍流空气自由射流引射规律与实验数据较好符合。本文还选用标准K-ε湍流模型对久膨胀超声速湍流空气自由射流的引射特性进行了初步的探索研究。
The calculation results of the jet characteristics of turbulent free jet given by four turbulence models in commercial CFD software are compared. The calculated data of jet injection quantity obtained by the four turbulence models are compared with those reported in the literature using porous wall technology The results show that the turbulent air jet law given by the standard K-ε turbulence model is in good agreement with the experimental data in the four turbulence models. In this paper, the standard K-ε turbulence model was also used to investigate the emissivity of long-expansion supersonic turbulent free-air jets.