| 引用本文: | 王一丁,陈滨琦,郭亮,等.空腔噪声非线性数值模拟.[J].国防科技大学学报,2015,37(4):151-157.[点击复制] |
| WANG Yiding,CHEN Binqi,GUO Liang,et al.Nonlinear numerical simulation of cavity noise[J].Journal of National University of Defense Technology,2015,37(4):151-157[点击复制] |
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| 空腔噪声非线性数值模拟 |
| 王一丁1, 陈滨琦1, 郭亮2, 钟范俊2, 童明波1 |
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(1.南京航空航天大学 航空宇航学院， 江苏 南京 210016;2.成都飞机设计研究所， 四川 成都 610091)
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| 摘要: |
| 将雷诺平均N-S方程与非线性噪声求解方法相结合，对M219空腔在Ma=0.6，Ma=0.85,Ma=1.35条件下进行了气动噪声分析。通过雷诺平均N-S方程求解空腔流场，得到包含空腔平均流场基本特征以及强制设定的湍流脉动统计描述的初始湍流统计平均解，采用非线性噪声求解方法重构噪声源并高精度模拟压力脉动的传播。通过与试验结果对比表明非线性噪声求解方法能够较好地捕捉空腔流动中的压强脉动及噪声水平。与分离涡模拟方法相比，非线性噪声求解方法在保持计算精度的同时大大减少计算网格，对内埋弹舱快速设计具有一定的参考意义。 |
| 关键词: 空腔；非线性；噪声源；湍流 内埋弹舱 |
| DOI：10.11887/j.cn.201504025 |
| 投稿日期：2014-02-10 |
| 基金项目: |
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| Nonlinear numerical simulation of cavity noise |
| WANG Yiding1, CHEN Binqi1, GUO Liang2, ZHONG Fanjun2, TONG Mingbo1 |
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(1. College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Chengdu Aircraft Design and Research Institute, Chengdu 610091, China)
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| Abstract: |
| In order to evaluate the M219 cavity noise at 0.6, 0.85 and 1.35 Mach number, nonlinear acoustic solver is combined with Reynolds-averaged Navier-Stokes equations. The flow field of a cavity is calculated by means of Reynolds-averaged Navier-Stokes equations, which contains basic characteristics of average flow field and turbulence statistical average solution of statistics description of turbulence fluctuation. Noise source is refactored by the nonlinear acoustic solver. Spread of pressure fluctuation is simulated precisely. A comparison shows that the simulation results of nonlinear acoustic solver agree well with the experiment results. Compared with detached eddy simulation，nonlinear acoustic solver can greatly reduce the amount of mesh. In addition, the method can provide some reference for internal weapons bay design. |
| Keywords: cavity nonlinearity source turbulence internal weapons bay |
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