中文摘要：

本文采用时空守恒（CE／SE）格式求解Navier—Stoks方程与Euler方程，数值模拟了绕圆柱流动引发的气动噪声源及传播问题。对近声场与远声场采用了不同的控制方程和边界条件，分别得到了流场与声场解。将其与采用大涡模拟和FW—H方程得到的结果进行了对比，表明本文的数值方法能够很好地反映流场与声场的形态，能较好地模拟声场指向性及流场中的拟声现象，相比LES／FW—H方法能更精确地反映流场与声场的相互关系。

英文摘要：

Based on the unstructured mesh space-time conservation element and solution element （CE/SE） scheme, a numerical simulation of noise source and propagation aroused by flow around a cylinder is established through solving Navier-Stokes and Euler equations. The computation domain is decomposed into sound-near field and sound-far field and different governing equations with different boundary conditions are used to simulate. Large eddy simulation （LES） is used to compute the acoustic source with the Ffowcs Williams-Hawkings（FW-H） acoustic analogy is applied compute the sound field. Comparing the two methods, more details about the non-linear relation between flow and sound, directionality and quasi-sound could be get by CE/SE scheme.