脉冲横向射流的大涡模拟  

Large eddy simulation of inclined transverse jet with pulsation

作　　者：史万里[1] 葛宁[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《航空动力学报》2013年第1期143-150,共8页Journal of Aerospace Power

摘　　要：为了研究脉冲气膜冷却的流动特性,采用基于高阶对称加权本质无振荡(WENO)-Roe格式和隐式牛顿迭代时间推进、动态亚格子模型和预处理技术下的大涡模拟(LES)计算方法,对吹气比为1.0下的斜管横向射流进行了稳态和脉冲两种不同工况下的数值模拟.计算结果显示了射流流场中存在发卡涡结构,研究表明射流孔进口位置的脉冲改变了射流出口拟序结构,即改变了射流与主流的掺混过程.To study the flow characteristics of film cooling of flat plates with pulsation,the large eddy simulation（LES） calculation method was adopted to simulate inclined cylindrical hole transverse jet at nominal blowing ratio of 1.0 and the numerical techniques of high order symmetric weighted essentially non-oscillatory（WENO）-Roe scheme,implicit Newtonian time advance,dynamic Smagorinsky sub-grid model and the preconditioned technology were involved.The working conditions of inclined tube transverse jet included steady and pulsed jet.Calculation results showed the hairpin vortex structure in transverse jet flow field.Research shows that the pulsation of the jet hole import changes jet exit coherent structure,which means the mixing process of jet and mainstream is changed.

关 键 词：脉冲射流 气膜冷却 大涡模拟 发卡涡 拟序结构 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]