脉冲横向射流的大涡模拟

史万里; 葛宁

脉冲横向射流的大涡模拟

史万里,
葛宁

南京航空航天大学能源与动力学院,南京 210016

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出版历程
- 收稿日期: 2012-01-18
- 刊出日期: 2013-01-28

Large eddy simulation of inclined transverse jet with pulsation

SHI Wan-li,
GE Ning

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

摘要

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.
- 脉冲射流 /
- 气膜冷却 /
- 大涡模拟 /
- 发卡涡 /
- 拟序结构
Abstract: 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.
- pulsed jet /
- film cooling /
- large eddy simulation(LES) /
- hairpin vortex /
- coherent structure

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参考文献(18)

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