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.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2012年第1期56-60,共5页
Journal of Nanjing University of Aeronautics & Astronautics
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
computational aeroacoustics
linearized Euler equations
finite difference method
cavity
stochastic model
作者简介
通讯作者：伍贻兆，男，教授，博士生导师，E-mail：wyzao@nuaa．edu．cn。
