非均布轴流风扇叶片力特性及其尖峰噪声特性预测
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摘要
采用数值模拟方法对汽车用冷却风扇的均布和非均布叶片分布的模型进行了研究.通过对叶片采用片条化处理,分析了叶片力与非均布角度之间的关系,建立了叶片力与叶片相位角之间的叶片力模型.基于非均布风扇叶片力的特性,通过Lowson点力发声模型提出了非均布风扇的噪声预测方法,并建立了基于风扇叶片力模型的低速轴流非均布风扇尖峰噪声预测模型.通过与基于计算流体力学(CFD)的Lowson模型预测结果、实验数据以及其他非均布叶片噪声预测模型的对比,验证了该预测模型的有效性.
In this paper, the numerical simulation method is used to investigate the even-spaced and uneven-spaced automotive cooling fans. The relationship between blade force and uneven-spaced blade distribution angle is analyzed through blade striping treatment, and the model between blade force and blade phase angle of uneven-spaced fan is established. Based on the characteristics of uneven-spaced fan blade force, a noise prediction method for uneven-spaced fan is proposed by using Lowson point force model, and a peak noise prediction model for low-speed non-uniformly distributed fan based on fan blade force model is established. The prediction model is verified by comparing with the prediction results of Lowson model based on computational fluid dynamics(CFD), experimental data and other uneven-spaced fan blade noise prediction models.
In this paper, the numerical simulation method is used to investigate the even-spaced and uneven-spaced automotive cooling fans. The relationship between blade force and uneven-spaced blade distribution angle is analyzed through blade striping treatment, and the model between blade force and blade phase angle of uneven-spaced fan is established. Based on the characteristics of uneven-spaced fan blade force, a noise prediction method for uneven-spaced fan is proposed by using Lowson point force model, and a peak noise prediction model for low-speed non-uniformly distributed fan based on fan blade force model is established. The prediction model is verified by comparing with the prediction results of Lowson model based on computational fluid dynamics(CFD), experimental data and other uneven-spaced fan blade noise prediction models.
引文
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[3] KIM T Y.Reduction of tonal propeller noise by means of uneven blade spacing[D].California:University of California,Irvine,2016.
[4] 上海博泽电机有限公司.一种低旋转噪声的汽车发动机冷却风扇:CN105508015A [P].2016-04-20[2017-09-26].Shanghai Brose Electric Motors Co.,Ltd..A low rotating noise cooling fan for automotive engine:CN105508015A [P],2016-04-20[2017-09-26].
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[6] CATTANEI A,GHIO R,BONGIOVI A.Reduction of the tonal noise annoyance of axial flow fans by means of optimal blade spacing[J].Applied Acoustics,2007,68(11/12):1323-1345.
[7] MELLIN R C,SOVRAN G.Controlling the tonal characteristics of the aerodynamic noise generated by fan rotors[J].Journal of Basic Engineering,1970,92(1):143-154.
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[9] DUNCAN P E,DAWSON B.Reduction of interaction tones from axial flow fans by suitable design of rotor configuration[J].Journal of Sound and Vibration,1974,33(2):143-154.
[10] 孙晓峰.不等节距叶片风机气动声学特性的研究[J].北京航空学院学报,1986(4):137-145.SUN Xiaofeng.The aeroacoustic nature of unequally spaced fan[J].Journal of Beijing Institute of Aeronautics and Astronautics,1986(4):137-145.
[11] WRIGHT S E.Sound radiation from a lifting rotor generated by asymmetric disc loading[J].Journal of Sound and Vibration,1969,9(2):223-240.
[12] LEWY S.Theoretical study of the acoustic benefit of an open rotor with uneven blade spacings[J].Journal of the Acoustical Society of America,1992,92(4):2181-2185.
[13] DOBRZYNSKI W.Propeller noise reduction by means of unsymmetrical blade spacing[J].Journal of Sound and Vibration,1993,163(1):123-136.
[14] ANGHINOLFI D,CANEPA E,CATTANEI A.Psychoacoustic optimization of the spacing of pro-pellers,helicopter rotors,and axial fans[J].Journal of Propulsion and Power,2016,32(6):1-11.
[15] LOWSON M V.Theoretical analysis of compressor noise[J].Journal of the Acoustical Society of America,1970,42(5):371-385.
[2] BECHER M,BECKER S.Investigation of the applicability of numerical noise prediction of an axial vehicle cooling fan [C]//SAE 2014 World Congress & Exhibition.Detroit,USA:SAE,2016.
[3] KIM T Y.Reduction of tonal propeller noise by means of uneven blade spacing[D].California:University of California,Irvine,2016.
[4] 上海博泽电机有限公司.一种低旋转噪声的汽车发动机冷却风扇:CN105508015A [P].2016-04-20[2017-09-26].Shanghai Brose Electric Motors Co.,Ltd..A low rotating noise cooling fan for automotive engine:CN105508015A [P],2016-04-20[2017-09-26].
[5] GIDON N,FRANK K,NILS S.Numerical simulations of unsteady aerodynamic effects in the blade tip region of cooling fans[C]//ASME Turbo Expo 2016.Seoul,South Korea:ASME,2016:Paper No.GT2016-57786.
[6] CATTANEI A,GHIO R,BONGIOVI A.Reduction of the tonal noise annoyance of axial flow fans by means of optimal blade spacing[J].Applied Acoustics,2007,68(11/12):1323-1345.
[7] MELLIN R C,SOVRAN G.Controlling the tonal characteristics of the aerodynamic noise generated by fan rotors[J].Journal of Basic Engineering,1970,92(1):143-154.
[8] EWALD D,PAVLOVIC A,BOLLINGER J G.Noise reduction by applying modulation principle[J].Journal of the Acoustical Society of America,1971,49(5):1381-1385.
[9] DUNCAN P E,DAWSON B.Reduction of interaction tones from axial flow fans by suitable design of rotor configuration[J].Journal of Sound and Vibration,1974,33(2):143-154.
[10] 孙晓峰.不等节距叶片风机气动声学特性的研究[J].北京航空学院学报,1986(4):137-145.SUN Xiaofeng.The aeroacoustic nature of unequally spaced fan[J].Journal of Beijing Institute of Aeronautics and Astronautics,1986(4):137-145.
[11] WRIGHT S E.Sound radiation from a lifting rotor generated by asymmetric disc loading[J].Journal of Sound and Vibration,1969,9(2):223-240.
[12] LEWY S.Theoretical study of the acoustic benefit of an open rotor with uneven blade spacings[J].Journal of the Acoustical Society of America,1992,92(4):2181-2185.
[13] DOBRZYNSKI W.Propeller noise reduction by means of unsymmetrical blade spacing[J].Journal of Sound and Vibration,1993,163(1):123-136.
[14] ANGHINOLFI D,CANEPA E,CATTANEI A.Psychoacoustic optimization of the spacing of pro-pellers,helicopter rotors,and axial fans[J].Journal of Propulsion and Power,2016,32(6):1-11.
[15] LOWSON M V.Theoretical analysis of compressor noise[J].Journal of the Acoustical Society of America,1970,42(5):371-385.