| 格子Boltzmann方法应用于气动声学研究 |
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| 引用本文： | 邓义求,唐政,董宇红. 格子Boltzmann方法应用于气动声学研究[J]. 计算物理, 2013, 30(6): 808-814 |
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| 作者姓名： | 邓义求 唐政 董宇红 |
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| 作者单位： | 上海大学, 上海市应用数学和力学研究所, 上海 200072 |
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| 基金项目： | 国家自然科学基金(10972132,11272198)资助项目 |
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| 摘 要： | 应用格子Boltzmann方法(LBM)对不同类型的气动声学问题进行数值研究.通过模拟一维平面声波和二维点源声波的传播,得到沿传播方向的声压脉动,其振荡幅值和衰减趋势与理论值相吻合.其次进行声波衍射和干涉现象的数值模拟.最后,模拟处于流场中运动声源辐射声场的多普勒效应.模拟结果说明LBM方法能较好地模拟低马赫数下的声学问题,包括声压脉动的传播,声波的波动特性以及流动与声波间的相互作用.
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| 关 键 词： | 气动声学 格子波尔兹曼方法 声辐射 多普勒效应 |
| 收稿时间： | 2012-12-03 |
| 修稿时间： | 2013-04-06 |
Lattice Boltzmann Method for Simulating Propagating Acoustic Waves |
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| DENG Yiqiu,TANG Zheng,DONG Yuhong. Lattice Boltzmann Method for Simulating Propagating Acoustic Waves[J]. Chinese Journal of Computational Physics, 2013, 30(6): 808-814 |
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| Authors: | DENG Yiqiu TANG Zheng DONG Yuhong |
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| Affiliation: | Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China |
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| Abstract: | For application of lattice Bohzmann method (LBM) in aeroacoustics field, four fundamental acoustic cases are simulated. Sound waves propagating with planar source and single point source are used to investigate reliability of LBM in aeroacoustics. Capability for reflecting waves is then investigated with diffraction and interference. Doppler effect is simulated to illustrate coupled acoustics and flows. In all cases, simulated acoustics is found in good agreement with analytic solutions. It shows that LBM has good performance in computational aeroacoustics field. |
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| Keywords: | areoacoustic lattice Bohzmann method wave propagation Doppler effect |
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