Large-eddy Simulation of Near-field Dynamics in a Particle-laden Round Turbulent Jet  

两相圆湍射流近场动态特性的大涡模拟(英文)

作　　者：王兵[1] 张会强[1] 王希麟[1] 

机构地区：[1]清华大学航天航空学院

出　　处：《Chinese Journal of Aeronautics》2010年第2期162-169,共8页中国航空学报（英文版）

基　　金：National Natural Science Foundation of China (50706021);Ph.D.Programs Foundation of Ministry of Education of China (20070003018);TNList Cross-discipline Foundation

摘　　要：This article investigates the near-field dynamics in a particle-laden round turbulent jet in a large-eddy simulation （LES）. A point-force two-way coupling model is adopted in the simulation to reveal the particle modulation of turbulence. The particles mainly excite the initial instability of the jet and bring about the earlier breakup of vortex rings in the near-field. The flow fluc- tuating intensity either in the axial or in the radial directions is hence increased by particles. The article also describes the mean velocity modulated by particles. The changing statistical velocity induced by particle modulation implies the effects of modulation of the local flow structures. This study is expected to be useful to the control of two-phase turbulent jets.This article investigates the near-field dynamics in a particle-laden round turbulent jet in a large-eddy simulation （LES）. A point-force two-way coupling model is adopted in the simulation to reveal the particle modulation of turbulence. The particles mainly excite the initial instability of the jet and bring about the earlier breakup of vortex rings in the near-field. The flow fluc- tuating intensity either in the axial or in the radial directions is hence increased by particles. The article also describes the mean velocity modulated by particles. The changing statistical velocity induced by particle modulation implies the effects of modulation of the local flow structures. This study is expected to be useful to the control of two-phase turbulent jets.

关 键 词：large-eddy simulation particle-laden jet turbulence structures jet near-fields two-way coupling 

分 类 号：V235.111[航空宇航科学与技术—航空宇航推进理论与工程]