| 轴对称射流气动声场的数值模拟 |
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| 引用本文： | 胡国庆,刘明宇,傅德薰,马延文. 轴对称射流气动声场的数值模拟[J]. 计算物理, 2001, 18(3): 193-198 |
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| 作者姓名： | 胡国庆 刘明宇 傅德薰 马延文 |
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| 作者单位： | LNM,中国科学院力学研究所,北京,100080;LHD,中国科学院力学研究所,北京,100080 |
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| 基金项目： | 国家自然科学基金(19872069)及九七三(G1999032805)资助项目 |
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| 摘 要： | 构造了Kirchhoff积分和CFD计算相结合的算法,采用高精度差分格式对不同喷口马赫数的轴对称射流进行数值模拟,并以此作为近场声源,运用Kirchhoff积分方法研究远场气动噪声.数值结果表明,远场噪声具有方向性,噪声声压在离开对称轴20°处达到最大值.随着传播距离增大,噪声方向性逐渐减弱.
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| 关 键 词： | 气动噪声 轴对称射流 Kirchhoff积分 紧致差分格式 |
| 文章编号： | 1001-246(2001)03-0193-06 |
| 收稿时间： | 2000-02-01 |
| 修稿时间： | 2000-02-01 |
NUMERICAL SIMULATION OF THE SOUND FIELD GENERATED BY AXISYMMETRIC JET |
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| HU Guo-qing,LIU Ming-yu,FU De-xun,MA Yan-wen. NUMERICAL SIMULATION OF THE SOUND FIELD GENERATED BY AXISYMMETRIC JET[J]. Chinese Journal of Computational Physics, 2001, 18(3): 193-198 |
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| Authors: | HU Guo-qing LIU Ming-yu FU De-xun MA Yan-wen |
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| Affiliation: | 1. LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, P R China;2. LHD, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, P R China |
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| Abstract: | An algorithm is proposed to combine Kirchhoff integral and an unsteady flow computation. Axisymmetric jet flows are given by DNS using 5-order accurate upwind compact scheme and 3-order accurate Runge-Kutta scheme. Kirchhoff integral is used to predict the far-field sound. Numerical results show that far-field sound pressure has the directivity and reaches maximal value at 20° diverged from the flow direction. The directivity is attenuating while the propagation distance is increasing. |
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| Keywords: | aeroacoustic noise axisymmetric jet Kirchhoff integral compact difference scheme |
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