三维串列双圆柱绕流气动流场及声场模拟  

AERODYNAMICS AND AEROACOUSTICS NUMERICAL SIMULATION OF FLOW PAST TWO CIRCULAR CYLINDERS IN TANDEM ARRANGEMENTS

作　　者：刘敏[1] 刘飞[1] 胡亚涛[1] 甘加业[1] 王嘉冰[1] 吴克启[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《工程热物理学报》2008年第3期403-406,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50676035);博士学科点专项科研基金(No.20060487036)

摘　　要：数值模拟三维串列双圆柱在不同间距比下湍流流态及其辐射声场。采用大涡模拟(LES)求解非定常不可压缩Navier-Stokes方程得到瞬时流场数据,从而得到声源相关数据,求解基于FW-H积分方程的Farassat-1A方程计算载荷噪声得到相应声场分布。通过对不同间距比下相应的声场及观测点的声压频谱图进行比较可以发现:随着间距的变化,流场呈现出3种不同的流态,其声场也呈现不同的特点,在临界间距比下,总噪声值最大.the shedding of vortices, the flow pattern of turbulence and the sound radiation of aeroacoustics of two circular cylinders in tandem arrangements are investigated numerically in this paper. Using the unsteady incompressible Navier-stokes equation as the governing equation, the large eddy simulation （LES） model is used to obtain the flow instantaneous variables, the loading noise filed calculation is carried out through solving Farassat-lA equation which derived from FW-H equation. by Comparing of the flow field, the noise field, the sound pressure and the spectrum of observation point, the results shows that there are three flow pattern under different spacing of the two cylinders with different noise radiation characteristics, the SPL is larger near the critical spacing.

关 键 词：串列圆柱 气动声场 气动流场 大涡模拟 临界间距比 

分 类 号：O35[理学—流体力学]