| 基于SNGR方法的二维空腔噪声数值模拟 |
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| 引用本文： | 陈荣钱,伍贻兆,夏,健.基于SNGR方法的二维空腔噪声数值模拟[J].南京航空航天大学学报,2012,44(1):56-60. |
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| 作者姓名： | 陈荣钱 伍贻兆 夏 健 |
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| 作者单位： | 南京航空航天大学航空宇航学院 |
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| 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。
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| 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 |
Numerical Simulation of Two-Dimensional Cavity Noise by SNGR Method |
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| Chen Rongqian,Wu Yizhao,Xia Jian.Numerical Simulation of Two-Dimensional Cavity Noise by SNGR Method[J].Journal of Nanjing University of Aeronautics & Astronautics,2012,44(1):56-60. |
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| Authors: | Chen Rongqian Wu Yizhao Xia Jian |
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| Institution: | (College of Aerospace Engineering,Nanjing University of Aeronautics & Astronautics,Nanjing,210016,China) |
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| Abstract: | 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. |
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| Keywords: | computational aeroacoustics linearized Euler equations finite difference method cavity stochastic model |
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