基于SNGR方法的二维空腔噪声数值模拟  

Numerical Simulation of Two-Dimensional Cavity Noise by SNGR Method

作　　者：陈荣钱[1] 伍贻兆[1] 夏健[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《南京航空航天大学学报》2012年第1期56-60,共5页Journal of Nanjing University of Aeronautics & Astronautics

摘　　要：基于SNGR方法,采用有限差分法求解带源项的线化欧拉方程。数值方法采用色散关系保持(DRP)格式。低耗散色散龙格-库塔格式显式时间推进,采用无反射远场边界条件。对二维空腔,长深比为9∶1,在亚声速、跨声速和超声速多个马赫数下进行噪声预测,并与实验结果对比,两者吻合较好。Linearized Euler equations with the source terms are solved by finite difference method based on the SNGR method.The spatial discretization is conducted by the dispersion-relation-preserving（DRP） scheme.The time integration is implemented by low-dissipation and low-dispersion Rung-Kutta schemes.The non-reflecting far-field boundary conditions are utilized.The noise of the two-dimensional cavity with length to depth ratio 9∶1 is predicted at different Mach numbers under the subsonic,transonic and supersonic conditions,and the results agree with the experimental data.

关 键 词：计算气动声学 线化欧拉方程 有限差分法 空腔 随机模型 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]