摘要
本文从ψ-ω形式的不可压N-S方程出发,采用ADI-BGE格式及新的物面边界条件处理方法,并提出一种数值扰动模型,成功地计算了R_e=100时圆柱绕流卡门涡街流动,得到的流场结果比原有数值解准确,与实验结果符合良好,因而可用来进行声场数值研究。在声场计算方面,直接积分Curle方程,对R_e=100时的声源分布及其声辐射特性进行数值分析,并与涡声理论结果和流场中脉动力和脱体旋涡频谱进行比较,证明本文方法是成功的。
The Von-Karman vortex street flow around a circular cylinder is successfully solved at Re=100, with the ADI-BGE schemes and the recent treatment of body boundary conditions being applied and a new acceptable pertubation model to being introduced solving incompressible N^S equations in the form of stream function and vorticity. The solutions of the flow field obtained are better than previous numerical ones, and agree with the experimental data more closely. Therefore, it can be used to study sound field numerically. As for computation of sound field, the Curie equation is directly and numerically solved to analyze the distribution of sound sources and the characteristics of their radiated sound field at Re=100 and to compare with the solutions from the theory of vortex sound and the spectrum of the fluctuating force and separated vortices in the flow field. It is shown that this method is more successful.
出处
《声学学报》
EI
CSCD
北大核心
1992年第3期186-199,共14页
Acta Acustica
基金
国家自然科学基金
国家教委博士点基金资助项目
