入口扰动对圆湍射流流动大涡模拟预报的影响  

Effect of inlet perturbations on the prediction of turbulent round jet flows using large eddy simulations

作　　者：容易[1] 张会强[1] 王希麟[1] 

机构地区：[1]清华大学航天航空学院,北京100084

出　　处：《清华大学学报（自然科学版）》2006年第5期732-735,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50176027)

摘　　要：运用大涡模拟方法分别对不加扰动和加扰动的圆湍射流流动进行了数值模拟,比较了两者在大尺度涡结构的演化过程以及时均速度和湍流强度等统计结果方面的预报差异,并与实验结果进行了对照。模拟结果表明,施加了入口扰动的模拟结果在物理真实性方面和统计结果的准确性方面均要明显优于未加扰动的模拟结果。分析了不加扰动和加扰动模拟的本质差异,指出准确预报实际圆湍射流流动应采用施加入口扰动的三维模拟。Turbulent round jet flows were analyzed with and without inlet perturbations using large eddy simulations （LES）, The evolution of the large vortex structures and the statistical properties including the streamwise velocity and the turbulence intensity from the simulation were compared with and without inlet perturbations and then with experimental data. The results show that the simulation with the inlet perturbations is superior to that without inlet perturbations in terms of physical reality and accuracy, The results show that the actual turbulent round jet flow must be simulated by a three-dimensional analysis with inlet perturbations.

关 键 词：圆湍射流 大涡模拟 入口扰动 三维模拟 

分 类 号：O359[理学—流体力学]