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B/L湍流模型在强压力梯度流场计算中的应用
引用本文:梁德旺,黄国平,赵海峰. B/L湍流模型在强压力梯度流场计算中的应用[J]. 南京航空航天大学学报, 1999, 31(1): 37-42
作者姓名:梁德旺  黄国平  赵海峰
作者单位:南京航空航天大学动力工程系,南京,210016
基金项目:国家教委跨世纪人才基金,江苏省“青蓝工程”基金
摘    要:对在湍流计算中已得到广泛应用的Baldwin/Lomax(B/L)代数湍流模型进行了修正。修正后的B/L模型考虑了压力梯度及物面引射速度对内层VanDriest衰减因子的影响。与此同时,文中还用修正的B/L湍流模型对亚声平板附面层流动、拉伐尔喷管内的正激波/湍流附面层干扰流动进行了计算。计算与实验结果比较表明,修正后的B/L模型不仅可以更准确地计算具有强压力梯度的激波/附面层干扰区内流动压力分布,而且还可以准确地预报激波/附面层干扰引起的流动分离,从而为B/L模型的工程应用开拓了领域。

关 键 词:湍流  湍流模型  计算流体力学  激波/附面层干扰
修稿时间:1998-06-15

Application of B/L Turbulence Model for Calculating Flow with Strong Adverse Pressure Gradient
Liang Dewang,Huang Guoping,Zhao Haifeng. Application of B/L Turbulence Model for Calculating Flow with Strong Adverse Pressure Gradient[J]. Journal of Nanjing University of Aeronautics & Astronautics, 1999, 31(1): 37-42
Authors:Liang Dewang  Huang Guoping  Zhao Haifeng
Abstract:A modification on Baldwin/Lomax turbulence model widely used in the calculation of turbulent flow is done. Effect of pressure gradient and velocity on porous surface on Van Driest damping factor in the modified B/L model is considered. In the meanwhile, in order to verify the modified model, the original and modified B/L models are used to calculate the flow fields over a flat plate and normal shock wave/turbulent boundary layer interaction in a novel nozzle, and numerical and experimental results are compared. The results show that the modified B/L model can more accurately predict the shock position, the velocity distribution after the shock and the distribution of pressure on the wall in the interaction region, even can predict the existence of boundary layer separation caused by the strong adverse pressure gradient of the shock, while the original B/L model is impossible to do.
Keywords:turbulence  turbulence model  computational fluid mechanics  shock wave/boundary layer interaction
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