摘要
介绍了CFD-FASTRAN软件五种湍流模型。通过B-L湍流模型不同网格气动热计算结果的对比分析,说明近壁面第一层网格间距须保证y+值处于所选湍流模型要求值范围的1/3左右,才能保证计算结果的准确性。进一步通过直二次圆锥形不同湍流模型计算与试验的对比结果,说明CFD-FASTRAN软件的k-ε及B-L两种模型求解高超声速气动热问题能达到较好的准确性,且B-L模型计算速度快、使用方便,更适宜于整机大型数值计算。
Five turbulent models of CFD-FASTRAN software are introduced.The hypersonic aerodynamic heating calculation results by Baldwin-Lomax turbulent model of different grid scale shows that the wall-closest grid interval should make the y＋ value approximate to one third of the upper limit prescribed by turbulent model.Then,the comparison of the hypersonic aerodynamic heating calculation results by different turbulent model of CFD-FASTRAN software and the test data of a bi-conic shows that the k-ε and B-L turbulent model of this software can give a result accurate enough,and the B-L turbulent model can calculate more quickly and be competent for large scale calculation of a whole aircraft.
出处
《航空计算技术》
2011年第2期40-42,共3页
Aeronautical Computing Technique
