了解预测转捩与层流分离泡,对于低压高负荷叶片设计特别重要.为此,采用大涡模拟方法,对典型高负荷叶栅T106进行了模拟.计算描述了层流分离泡,给出了壁面压力、壁面摩擦力系数的分布,从而准确预测了T106压力面上的层流分离、转捩、湍流再附现象.计算同时刻画了层流分离泡的非定常性质,给出了瞬时压力,进行了频谱分析,确定主频为2500 Hz,并观察到了瞬时涡等有意义的现象.计算同时表明二维大涡模拟计算结果可以复现出湍流的许多重要现象并且精度可以满足工程需要.
参考文献
| [1] | R. J. Howell;H. P. Hodson;V. Schulte;R. D. Stieger;Heinz-Peter Schiffer;F. Haselbach;N. W. Harvey .Boundary Layer Development in the BR710 and BR715 LP Turbines - The Implementation of High-Lift and Ultra-High-Lift Concepts[J].Journal of turbomachinery,2002(3):385-392. |
| [2] | Curtis E M;Hodson H P et al.Development of Blade Profiles for Low Pressure Turbine Applications[J].ASME Journal of Turbomachinery,1997,119(03):531-538. |
| [3] | Hourmouziadis J.Aerodynamic Design of Low Pressure Turbines[A].,1989:LS-167. |
| [4] | Schulte V;Hodson H P .Unsteady Wake-Induced Boundary Layer Transition in Highly Loaded LP Turbines[ASME Paper 96-GT-486][R].,1996. |
| [5] | Wu XH.;Durbin PA. .Evidence of longitudinal vortices evolved from distorted wakes in a turbine passage[J].Journal of Fluid Mechanics,2001(0):199-228. |
| [6] | Raverdy B;Mary I;Sagaut P .High-Resolution LargeEddy Simulation of Flow Around Low-Pressure Turbine Blade[J].AIAA Journal,2003,41(03):390-397. |
| [7] | Boris J P;Grinstein F F et al.New Insights into Large Eddy Simulation[J].Fluid Dynamic Research,1992,10(4-6):199-228. |
| [8] | 李雪松 .基于可压缩流方法的大涡模拟及其工程化应用[D].中国科学院工程热物理研究所,2006. |
| [9] | 李新亮,马延文,傅德薰.二维槽道湍流的标度律分析[J].力学学报,2002(04):604-608. |
| [10] | Jimenez J .Transition to Turbulence in Two-Dimensional Poiseuille Flow[J].Journal of Fluid Mechanics,1990,218:265-297. |
| [11] | Engber M;Fottner L.The Effect of Incoming Wakes on Boundary Layer Transition in Gas Turbine Cascade[A].,1995:CP-571. |
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