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论文:2017,Vol:35,Issue(4):608-614 |
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引用本文： |
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许飞, 贺尔铭. 飞机环控管道阀门气动噪声产生机理及其影响因素分析[J]. 西北工业大学学报 |
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Xu Fei, He Erming. Simulation of Flow-Induced Noise Generation on Orifice Plates in an Aircraft Climate Control System[J]. Northwestern polytechnical university |
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| 飞机环控管道阀门气动噪声产生机理及其影响因素分析 |
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| 许飞, 贺尔铭 |
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| 西北工业大学 航空学院, 陕西 西安 710072 |
| 摘要: |
| 针对飞机环控管路系统中蝶形阀板产生的气动噪声，运用K-FWH积分法与CFD混合声学有限元方法分析了阀门噪声产生机理和影响因素，进行了阀门降噪优化设计。利用有限体积法获得管道内部流场脉动压力；分别利用K-FWH积分法与CFD混合法计算了阀门噪声并进行了对比验证；研究了阀门开度、位置、气流流速、管道直径和温度对噪声的影响规律并提出了新的降噪方法。研究表明：气流流经阀门时在前后壁面产生了速度和压力差，形成涡流产生强烈的气动噪声；K-FWH积分法在计算时忽略了管道和阀门结构对噪声的影响，其管道外部计算结果小于混合法；阀门开度、气流速度和管道直径显著影响管道噪声声压级大小；圆弧过渡阀板可以达到很好的降噪效果。 |
| 关键词:
气动噪声
流场
流速
大涡模拟
网格生成
噪声机理
阀门噪声
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| Simulation of Flow-Induced Noise Generation on Orifice Plates in an Aircraft Climate Control System |
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| Xu Fei, He Erming |
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| School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| The noise generated by a valve placed in the pipeline of an aircraft climate control system was investigated with two approaches based on Lighthill's analogy,one is the variational formulation of the Lighthill's analogy implemented in a Finite Element framework,the other is the so-called porous Ffowcs Williams-Hawkings (KFW-H) formulation. The finite volume method is used to obtain the fluctuating pressure data, the radiation noise of the valve is obtained by integrating the FW-H equation method and the acoustic finite element hybrid method.The effects of flow velocity, valve opening, valve position, pipe diameter and temperature on the sound pressure lever were studied respectively.The result show: air flowing produced a pressure difference between the front and rear valve, which generate vortex and produces strong aerodynamic noise. the calculation results of the KFW-H on the whole frequency are less than CFD mixed acoustic finite element method Because miss of the influence of structure on the noise.The valve opening and flow speed will significantly affect the aerodynamic noise of the pipeline.The use of circular arc valve plate instead of butterfly valve plate can achieve good noise reduction effect. |
| Key words:
aeroacoustics
flow fields
flow velocity
large eddy simulation
mesh generation
valves noise
Noise generation mechanism
valves noise
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| 收稿日期: 2017-03-01
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金（51675426）资助 |
| 通讯作者:
Email： |
| 作者简介: 许飞(1982—),西北工业大学博士研究生,主要从事固体力学研究。
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| 许飞 在本刊中的所有文章 |
| 贺尔铭 在本刊中的所有文章 |
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参考文献: |
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