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论文:2016,Vol:34,Issue(4):602-606 |
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引用本文： |
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牟永飞, 李杰, 张恒. 基于声源视角法的气动噪声计算研究[J]. 西北工业大学学报 |
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Mou Yongfei, Li Jie, Zhang Heng. The Study of Aeroacoustic Computing Efficiency Based on Acoustic Analogy[J]. Northwestern polytechnical university |
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| 基于声源视角法的气动噪声计算研究 |
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| 牟永飞, 李杰, 张恒 |
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| 西北工业大学 航空学院, 陕西 西安 710072 |
| 摘要: |
| 为提高气动噪声求解效率，Casalino提出了声源视角法，首先详细阐述了该方法，并列举其相比传统延迟时间法的优越之处。该方法主要是从声源视角重新建立延迟时间方程，此时无论声源运动形式是否复杂，都使延迟时间方程从超越方程变为代数方程，无需迭代即可直接求解，提高了声场程序的求解效率。其次新建立的延迟时间方程给求解声场的程序设计也带来很大便利，即无需预先存储大量时间步的流场数据，流场求解和声场求解在程序中可以同时进行。并且当接收点无论是静止、亚声速运动还是超声速运动，新建立的延迟时间方程的解均能给出明确的物理意义。最后以声源视角法为基础，通过编写声场求解程序并结合已有的流场求解程序求解圆柱绕流和后视镜绕流2个算例，进一步检验声源视角法的准确性和有效性，计算结果与实验结果吻合良好，表明了声源视角法准确、有效。 |
| 关键词:
气动噪声
求解效率
延迟时间方程
声源视角法
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| The Study of Aeroacoustic Computing Efficiency Based on Acoustic Analogy |
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| Mou Yongfei, Li Jie, Zhang Heng |
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| School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| In order to improve the computing efficiency of aeroacoustic, the retarded time equation is reconstructed based on the Casalino's advanced time approach from view of source domain. The retarded time equation was transformed regardless of the way of source moving form transcendental equation to algebraic equation. So the computing efficiency was improved by avoiding iterative methods. What's more, there is a convenience produced by the new retarded time equation that no fluid data is necessary to prestore and acoustic is computed at the same time. In addition, whether observer position with static, subsonic or supersonic, the solution of new retarded time equation has clear physical significance. finally, the efficiency of new approach was proved using a example of flow over cylinder and a example of flow over car mirror. |
| Key words:
aeroacoustic
computing efficiency
flow fields
lift drag radio
retarded time equation
source view
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| 收稿日期: 2016-03-15
修回日期:
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| DOI: |
| 基金项目: 航空科学基金（2014ZA53002）及国家重点基础研究发展计划（2015CB755800）资助 |
| 通讯作者:
Email： |
| 作者简介: 牟永飞(1988-),西北工业大学博士研究生,主要从事气动噪声、计算空气动力学研究。
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| 作者相关文章 |
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| 牟永飞 在本刊中的所有文章 |
| 李杰 在本刊中的所有文章 |
| 张恒 在本刊中的所有文章 |
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