沟槽型面减阻特性数值模拟研究

基于人工压缩性方法，时间项采用隐式离散、对流项采用基于Roe近似Riemann解的迎风格式，研究了三维不可压粘性流动的数值模拟方法，湍流模型采用Baldwin-Barth一方程模型，利用所发展的不可压粘性流数值模拟方法，对典型几类V型、间隔三角型和U型沟槽型面的不可压粘性流场进行了数值模拟计算研究，探索了上述几类沟槽型面参数对湍流减阻特性的影响规律，从表面摩阻、速度场等方面分析了上述几类沟槽型面的减阻作用机理。研究结果表明：上述典型沟槽的减阻效果可以分别达到7．6％，10．5％和5．0％，与国内外相关实验结果符合一致，所发展的计算方法是成功的、可行的。

Numerical Analysis of Turbulent Drag Reduction Using Riblets

Based on the method of artificial compressibility,a numerical method is studied for three-dimensional incompressible viscous flow over the riblet configurations,employing the Baldwin-Barth one-equation turbulence model,using implicit scheme for time terms and a third-order flux-difference splitting technique for the convective terms.The numerical computations of flows over symmetric V-groove,spaced triangular and valley curvature riblet non-smooth surfaces are performed and their geometric parameters are co...