基于流固耦合作用的柔性体流噪声降噪机理研究

doi:10.3901/JME.2016.10.176

摘要/Abstract

摘要： 舵体与流体相互作用产生的流噪声是水动力噪声的主要来源之一,这种噪声以宽频噪声为主,一般的降噪措施难以对其进行有效控制,而柔性舵体提供了解决的技术方案。以柔性NACA0018翼型为对象,基于流场大涡模拟、考虑任意运动固体边界的声学FW-H方程、并进一步利用弱耦合流固耦合算法考虑流体与柔性体的相互作用,对柔性翼型绕流非定常流场及流致噪声进行仿真,系统地分析不同攻角下柔性体的变形对流动、声源特性及流噪声辐射特性的影响。仿真结果表明：柔性体的变形延缓了壁面的流动分离,减小了湍流区,并抑制了壁面的压力脉动;降低了转捩区和湍流区的壁面声源强度,层流区的声源强度在大攻角下减小,而在小攻角下增大;随着攻角的变化,远场辐射噪声总声压级在翼型弦长方向和法线方向上呈现不同的变化规律,噪声频谱特性也表现出不同的规律。

关键词: FW-H方程, 大涡模拟, 流固耦合, 流噪声, 柔性体

Abstract: The flow induced noise by the interaction between structure and fluid for rudder is one of dominant sources of hydrodynamic noise, featured by broadband noise, which is difficult to be controlled by ordinary noise reduction measures, but a solution is provided by flexible rudder. The unsteady flow field and flow induced noise of a flexible NACA0018 airfoil are simulated using large eddy simulation method, along with the FW-H equation which considers the arbitrary boundary movement. The interaction between flexible body and fluid is taken into account by weak coupling method. Then the influence of airfoil’s flexible deformation on flow field, noise source, and sound radiation characters under different attack angles are analyzed systematically. The simulation results show that flow separation is postponed by the deformation, turbulence region is contracted, and wall pressure fluctuation is suppressed. The sound source intensity of transitional boundary-layer and turbulent flow are decreased, and it is reduced for laminar flow under large angle of attack, but increased under small attack angle. With attack angle increasing the radiated far-field overall sound pressure level varies in different ways in chord-length and normal directions, and their sound frequency properties are also affected by the flexible deformation unlikely.

Key words: flexible body, flow induced noise, fluid-structure interaction, FW-H equation, large eddy simulation

中图分类号:

U674

刘占生, 马瑞贤, 杨帆, 张广辉. 基于流固耦合作用的柔性体流噪声降噪机理研究[J]. 机械工程学报, 2016, 52(10): 176-184.

LIU Zhansheng, MA Ruixian, YANG Fan, ZHANG Guanghui. Study on Noise Reduction Mechanism of Flow Induced Noise for Flexible Body Based on Fluid-structure Interaction[J]. Journal of Mechanical Engineering, 2016, 52(10): 176-184.

参考文献

[1] DOOLAN C J,TETLOW M R,MOREAU D J,et al. Vortex shedding and tonal noise from a sharp bevelled trailing edge[C]//American Institute of Aeronautics and Astronautics. Proceedings of the 50th Aerospace Sciences Meeting,January 9-12,2012,Nashville Tennessee. Reston：AIAA,2012：68.
[2] MOREAU D J,BROOKS L A,DOOLAN C J. The effect of boundary layer type on trailing edge noise from sharp-edged flat plates at low-to-moderate Reynolds number[J]. Journal of Sound and Vibration,2012,331(17)：3976-3988.
[3] AMIET R K. Noise due to turbulent flow past a trailing edge[J]. Journal of Sound and Vibration,1976,47(3)：387-393.
[4] LOCKARD D P,LILLEY G M. The airframe noise reduction challenge[R]. NASA/TM,2004-213013：2004.
[5] BLAKE W K. Mechanics of flow-induced sound and vibration,Vol. 2[M]. New York：Academic Press,1986.
[6] PATERSON R W,AMIET R K. Noise of a model helicopter rotor due to ingestion of isotropic turbulence[J]. Journal of Sound and Vibration,1982,85(4)：551-577.
[7] NAKANO T,FUJISAWA N,OGUMA Y,et al. Experimental study on flow and noise characteristics of NACA0018 airfoil[J]. Journal of Wind Engineering and Industrial Aerodynamics,2007,95(7)：511-531.
[8] WANG M,MOIN P. Computation of trailing-edge flow and noise using large-eddy simulation[J]. AIAA Journal,2000,38(12)：2201-2209.
[9] MOREAU S,NEAL D,KHALIGHI Y,et al. Validation of unstructured-mesh LES of the trailing-edge flow and noise of a controlled-diffusion airfoil[C]//Center for Turbulence Research. Proceedings of the Summer Program,2006,Stanford,California：2006：1-14.
[10] MOREAU S,MENDONCA F,QAZI O,et al. Influence of turbulence modeling on airfoil unsteady simulations of broadband noise sources[C]//American Institute of Aeronautics and Astronautics. 11th AIAA/CEAS Aeroacoustics Conference(26th Aeroacoustics Conference),May 23-25,2005,Monterey,California. Reston：AIAA,2005：1-12.
[11] WINKLER J. LES of the trailing-edge flow and noise of a NACA6512-63 airfoil at zero angle of attack[C]// Center for Turbulence Research. Proceedings of Summer Program 2008,Stanford,California：2008：331-342.
[12] MATHEY F. Aerodynamic noise simulation of the flow past an airfoil trailing-edge using a hybrid zonal RANS-LES[J]. Computers & Fluids,2008,37(7)：836-843.
[13] ROGER M,MOREAU S. Back-scattering correction and further extensions of Amiet’s trailing-edge noise model. Part 1：theory[J]. Journal of Sound and Vibration,2005,286(3)：477-506.
[14] 宋保维,马骥,胡海豹,等. 水下航行器流噪声特性分析[J]. 鱼雷技术,2009,17(2)：5-9.
SONG Baowei,MA Ji,HU Haibao,et al. Numerical analysis of flow noise for underwater vehicle[J]. Tropedo Technology,2009,17(2)：5-9.
[15] 杨燕丽,杨爱玲,董锐,等. 安装角对压气机叶栅气动噪声特性的影响[J]. 航空学报,2012,33(4)：588-596.
YANG Yanli,YANG Ailing,DONG Rui,et al. Influence of stagger angle on aerodynamic noise performance of compressor cascade[J]. Acta Aeronautica et Astronautica Sinica,2012,33(4)：588-596.
[16] 伍文华,杜平安,陈燕,等. 大涡模拟在轴流风扇气动噪声仿真中的应用[J]. 机械设计与制造,2013(1)：63-65.
WU Wenhua,DU Pingan,CHEN Yan,et al. The application of LES in aerodynamic noise simulation for axial fan[J]. Machinery Design & Manufacture,2013(1)：63-65.
[17] 陈曦,王国栋,胡婧,等. 舵翼压力脉动及流噪声特性数值分析[C]//第十一届全国水动力学学术会议,8月25-29,2012,无锡. 海洋出版社,2012：370-375.
CHEN Xi,WANG Guodong,HU Jing,et al. Numerical analysis of pressure fluctuation and flow induced noise characteristics of rudder[C]//The 11th National Academic Conference on Hydrodynamic,August 25-29,2012,Wuxi. China Ocean Press,2012：370-375.
[18] 王益有,吴敏,刘敦绿. 基于 CFD 的发动机冷却风扇噪声计算[J]. 机械工程师,2009(11)：11-13.
WANG Yiyou,WU Min,LIU Dunlu. Noise calculation of engine cooling fan based on CFD[J]. Mechanical Engineer,2009(11)：11-13.
[19] 毛义军,祁大同,刘秋洪. 基于非定常流场的离心风机气动噪声分析[J]. 西安交通大学学报,2005,39(9)：989-993.
MAO Yijun,QI Datong,LIU Qiuhong. Analysis of the aeroacoustics in centrifugal fan based on numerical simulation of unsteady viscous flow[J]. Journal of Xi’an Jiaotong University,2005,39(9)：989-993.
[20] 李嵩,朱之墀. 离心风机BPF噪声数值预估方法及其应用[J]. 现代振动与噪声技术,2011(9)：113-116.
LI Song,ZHU Zhichi. Numerical predicting method for BPF noise of centrifugal fan noise and its application[J]. Modern Vibration and Noise Technology,2011(9)：113-116.
[21] WU T. Hydromechanics of swimming propulsion. Part 1. Swimming of a two-dimensional flexible plate at variable forward speeds in an inviscid fluid[J]. Journal of Fluid Mechanics,1971,46(2)：337-355.
[22] 童秉纲,庄礼贤. 描述鱼类波状游动的流体力学模型及其应用[J]. 自然杂志,1998,20(1)：1-7.
TONG Binggang,ZHUANG Lixian. Hydrodynamic model for fish’s undulatory motion and its applications[J]. Chinese Journal of Nature,1998,20(1)：1-7.
[23] 童秉纲. 鱼类波状游动的推进机制[J]. 力学与实践,2000,22(3)：69-74.
TONG Binggang. Promoting mechanism of fish’s undulatory motion[J]. Mechanics in Engineering,2000,22(3)：69-74.
[24] 夏全新,鲁传敬,吴磊. 鱼类波状摆动推进的数值模拟[J]. 水动力学研究与进展：A辑,2005,20(增刊1)：921-928.
XIA Quanxin,LU Chuanjing,WU Lei. Numerical simulation about fish undulating advancing[J]. Journal of Hydrodynamics,Ser. A,2005,20(Suppl.1)：921-928.
[25] 韩路辉. 机器鱼被动推进的理论分析与仿真研究[D]. 哈尔滨：哈尔滨工业大学,2009.
HAN Luhui. Theory analysis and simulation research on passive-dynamic robot fish[D]. Harbin：Harbin Institute of Technology,2009.
[26] 刘芳芳,杨灿军,苏琦,等. 仿生鱼鳍运动仿真分析及试验研究[J]. 机械工程学报,2010,46(19)：24-29.
LIU Fangfang,YANG Canjun,SU Qi,et al. Simulation analysis and experimental research on the movements of biomimetic fin[J]. Journal of Mechanical Engineering,2010,46(19)：24-29.
[27] 王振龙,杭观荣,李健,等. 面向水下无声推进的形状记忆合计丝驱动柔性鳍单元[J]. 机械工程学报,2009,45(2)：126-131.
WANG Zhenlong,HANG Guanrong,LI Jian,et al. Shape memory alloy wire actuated flexible biomimetic fin for quiet underwater propulsion[J]. Journal of Mechanical Engineering,2009,45(2)：126-131.
[28] 崔祚,姜洪洲,何景峰,等. BCF仿生鱼游动机理的研究进展及关键技术分析[J]. 机械工程学报,2015,51(16)：177-184.
CUI Zuo,JIANG Hongzhou,HE Jingfeng,et al. Research development and key techniques of BCF robotic fish in locomotion mechanism[J]. Journal of Mechanical Engineering,2015,51(16)：177-184.
[29] CHRISTOPHE J,MOREAU S. LES of the trailing-edge flow and noise of a controlled-diffusion airfoil at high angle of attack[C]//Center for Turbulence Research. Proceedings of the Summer Program 2008,Stanford,California：2008：305-316.
[30] OBERAI A A,ROKNALDIN F R,HUGHES T J. Computation of trailing-edge noise due to turbulent flow over an airfoil[J]. AIAA Journal,2002,40(11)：2206-2216.
[31] 孟堃宇. 基于大涡模拟的潜艇脉动压力与流噪声性能数值计算[D]. 上海：上海交通大学,2011.
MENG Kunyu. Numerical simulation of wall pressure fluctuations and flow-induced noise performance with submarine based on the large eddy simulation method[D]. Shanghai：Shanghai Jiao Tong University,2011.
[32] BRENTNER K S,FARASSAT F. Analytical comparison of the acoustic analogy and Kirchhoff formulation for moving surfaces[J]. AIAA Journal,1998,36(8)：1379-1386.
[33] KIM H J,LEE S,FUJISAWA N. Computation of unsteady flow and aerodynamic noise of NACA0018 airfoil using large-eddy simulation[J]. International Journal of Heat and Fluid Flow,2006,27(2)：229-242.
[34] TOMIMATSU S,FUJISAWA N. Measurement of aerodynamic noise and unsteady flow field around a symmetrical airfoil[J]. Journal of Visualization,2002,5(4)：381-388.
[35] CURLE N. The influence of solid boundaries upon aerodynamic sound[J]. Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences,1955,231(1187)：505-514.
[36] LIGHTHILL M J. On sound generated aerodynamically. I. general theory[J]. Proceedings of the Royal Society of London,Series A,Mathematical and Physical Sciences,1952,211(1107)：564-587.