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论文:2012,Vol:30,Issue(6):847-851 |
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引用本文： |
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白俊强, 余培汛, 郭博志, 黄江涛. 用CFD/FW-H混合方法计算圆柱/翼型的气动噪声[J]. 西北工业大学 |
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Bai Junqiang, Yu Peixun, Guo Bozhi, Huang Jiangtao. An Effective Numerical Simulation Approach to Noise Induced by Flow around Rod-Airfoil Using the Hybrid Method with Solutions of DES and FW-H integration[J]. Northwestern polytechnical university |
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| 用CFD/FW-H混合方法计算圆柱/翼型的气动噪声 |
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| 白俊强1, 余培汛1, 郭博志2, 黄江涛1 |
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1. 西北工业大学 航空学院, 陕西 西安 710072;
2. 中国商用飞机公司上海设计研究所, 中国 上海 200233 |
| 摘要: |
| 气动噪声预测的关键在于提高流场的预测精度,特别是对涡流扰动的细节描述。文章采用的是计算流体力学(CFD)与"声比拟"相结合的方法,通过2个步骤模拟流动的声学远场。第1步,在包含所有声源的近场区域内,通过使用DES方法获得控制面处的非定常流场参数;第2步,采用基于可穿透数据面的FW-H方法模拟声学远场。该方法与传统的半经验方法相比,具有计算量小,计算精确,易于工程实现,可以计算非线性噪声。文中对比了URANS和DES 2种方法所算的气动噪声结果。在频域上计算了观测点处的声压级随斯托劳哈数和频率的变化,其结果与国外试验结果对比取得了较好的一致性。 |
| 关键词:
DES
可穿透数据面的FW-H方法
圆柱/翼型
气动噪声
URANS
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| An Effective Numerical Simulation Approach to Noise Induced by Flow around Rod-Airfoil Using the Hybrid Method with Solutions of DES and FW-H integration |
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| Bai Junqiang1, Yu Peixun1, Guo Bozhi2, Huang Jiangtao1 |
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1. College of Aeronautics, Northwestern Polytechnic University, Xi'an 710072, China;
2. Shanghai Aircraft Design & Research Institute, Shanghai 200233, China |
| Abstract: |
| Improving the accuracy of the flow prediction,especially the detailed description of the vortex disturb-ance,is the key of aerodynamic noise prediction. This paper uses acoustic analogy in combination with computa-tional fluid dynamics. Sections 1 through 3 of the full paper explain our simulation approach mentioned in the title,which we believe is effective; their core consists of: (1) In the first step,the unsteady flow field is computed in anear-field domain comprising all acoustic sources via a DES solver; (2) In the second step,the FW-H integrationapproach with a permeable data surface is used to extend the dynamic near field to the acoustic far field; (3) com-pared with the traditional semi-empirical method,this approach requires less calculations but get results with betterprecision; most importantly,it can compute nonlinear noise and is easy to use. Section 4 gives simulation resultsfor both near field and far field; it gives calculated results for both URANS and DES; it calculates respectivelysound pressure level variations with frequency and Strouhal number; the results,presented in Figs. 9 through 14,and their analysis show preliminarily that our simulation approach is indeed effective. |
| Key words:
aeroacoustics
airfoils
calculations
computational fluid dynamics
computational geometry
comput-er simulation
computer software
experiments
finite volume method
flow fields
integration
math-ematical models
Navier Stokes equations
Strouhal number
unsteady flow;aerodynamic noise
DES
FW-H integration approach
rod-airfoil
sound pressure level
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| 收稿日期: 2011-10-28
修回日期:
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| DOI: |
| 通讯作者:
Email： |
| 作者简介: 白俊强(1971-)，西北工业大学教授，主要从事气动设计研究。
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参考文献: |
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[1] 胡国庆, 傅德黛, 马延文.基于比拟理论的翼型扰流声场数值模拟.力学学报, 2000, 32(4): 393-410Hu G Q，Fu D D，Ma Y W.Numerical Simulation of Noise Generated by Flow Past an Airfoil Using Acoustic Analogy.ACTAMechanica Sinica, 2000, 32(4): 393-410 (in Chinese)
[2] 陈正武, 王福新.悬停旋翼气动噪声数值分析方法研究: [硕士学位论文].中国空气动力研究与发展中心研究生部，2008, 4Chen Z W，Wang F X.The Researching of Numerical Simulation Method of Aeroacoustics for Hovering Rotors of Helicopter．Master Degree Dissertation，China Aerodynamics Research and Development Center Graduated School, 2008, 4 (in Chinese)
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[7] Bjorn Greschner，Frank Thiele.Prediction of Sound Generated by a Rod-Airfoil Configuration Using a Cubic Explicit AlgebraicStress Model for Detached Eddy Simulation and the Generalised Lighthill/FW-H Analogy.AIAA-2006-262 |
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