圆柱绕流气动噪声数值分析  

Numerical analysis of noise induced by flow around a cylinder

作　　者：顾信忠[1,2] 李舜酩[1] 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016 [2]南京航空航天大学金城学院车辆系,江苏南京211156

出　　处：《声学技术》2016年第2期95-100,共6页Technical Acoustics

摘　　要：为了快速预测刚性圆柱绕流的气动噪声,研究了一种将离散涡方法(DVM)和涡声理论结合起来计算低马赫数、高雷诺数流场气动噪声的方法。首先用Oseen粘性涡模型改进了离散涡方法并模拟了圆柱绕流,分析结果与实际情况相符。根据流场计算的结果,应用涡声理论进一步计算了远场的声压。测点的总声压级与实验值及其他数值计算结果都比较吻合。最后绘制了声场的指向性特性曲线,表明圆柱绕流声场明显的偶极子特性。The method of combination of Discrete Vortex Method （DVM） and the theory of vortex sound are used to predict two-dimensional far field noise induced by flow around a cylinder. Firstly, the field of flow around a cylinder is simulated using the Oseen vortex model. The simulation results are in agreement with experimental data. Based on the simulation results, the characteristic of the acoustic field is studied. The overall sound pressure levels of receivers also accord wellwith both experimental data and other numerical simulation results. The polar diagrams of the aeroacoutic pressure are plotted. And the dipolar nature of the generated sound is confirmed.

关 键 词：气动噪声 圆柱绕流 离散涡方法 涡声理论 Oseen涡 

分 类 号：TB533[理学—物理]