尾缘锯齿对斜流叶轮气动噪声的影响
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摘要
针对某型斜流叶轮的气动噪声问题,利用FLUENT软件对尾缘锯齿斜流叶轮的气动噪声进行数值模拟,获得尾缘锯齿斜流叶轮气动噪声的分布特性,并对比分析尾缘锯齿结构对气动噪声的影响规律。结果表明,尾缘锯齿结构可显著降低斜流叶轮整体噪声水平,并且形状越尖锐的锯齿降噪效果越明显,但同时存在叶轮气动性能的损失。研究结果可为斜流叶轮的降噪设计提供理论依据。
According to the aerodynamic noise issue of one type mixed-flow impeller,the aerodynamic noise of one mixed-flow impeller with serrated trailing-edges is numerically simulated using the FLUENT software.The distribution characteristics of aerodynamic noise of mixed-flow impeller with serrated trailing edges are obtained,and the influence regulations of serrated trailing-edges structure on aerodynamic noise are compared and analyzed.The results show that the serrated trailing-edge structure can significantly reduce the overall noise level of the mixed-flow impeller.The sharper the shape of serrated is,the more obvious the noise reduction effect is,but accompanied by loss of aerodynamic performance of the impeller.The research results will provide a theoretical basis for the design of the noise reduction of the mixed-flow impeller.
According to the aerodynamic noise issue of one type mixed-flow impeller,the aerodynamic noise of one mixed-flow impeller with serrated trailing-edges is numerically simulated using the FLUENT software.The distribution characteristics of aerodynamic noise of mixed-flow impeller with serrated trailing edges are obtained,and the influence regulations of serrated trailing-edges structure on aerodynamic noise are compared and analyzed.The results show that the serrated trailing-edge structure can significantly reduce the overall noise level of the mixed-flow impeller.The sharper the shape of serrated is,the more obvious the noise reduction effect is,but accompanied by loss of aerodynamic performance of the impeller.The research results will provide a theoretical basis for the design of the noise reduction of the mixed-flow impeller.
引文
[1] LYU B,AZARPEYVAND M,SINAYOKO S.Prediction of noise from serrated trailing edges[J].Journal of Fluid Mechanics,2016,793:556-588.
[2] HOWE M S.Aerodynamic noise of a serrated trailing edge[J].Journal of Fluids&Structures,1991,5(1):33-45.
[3] Dassen T,Parchen R,Bruggeman J,et al.Results of a wind tunnel study on the reduction of airfoil self-noise by the application of serrated blade trailing edges[C]//Proceeding of the European Union Wind Energy Conference and Exhibition.Gothenburg:National Aerospace Laboratory NLR,1996:800-803.
[4] GRUBER M,AZARPEYVAND M,JOSEPH P F.Airfoil trailing edge noise reduction by the introduction of sawtooth and slitted trailing edge geometries[J].Drug Metabolism&Disposition,2010,32(3):576-579.
[5]仝帆,乔渭阳,王良锋,等.仿生学翼型尾缘锯齿降噪机理[J].航空学报,2015,36(9):2911-2922.
[6]李福新,石秀华,张宇文.转捩区长度对回转体流噪声的影响[J].应用声学,2000,19(3):28-32.
[7] LARDEAU S,LESCHZINER M,ZAKI T.Large eddy simulation of transitional separated flow over a flat plate and a compressor blade[J].Flow Turbulence&Combustion,2012,88(1-2):19-44.
[8]刘飞,胡亚涛,刘敏,等.平板前缘分离抑制的周期性激励研究[J].工程热物理学报,2010,31(1):36-39.
[2] HOWE M S.Aerodynamic noise of a serrated trailing edge[J].Journal of Fluids&Structures,1991,5(1):33-45.
[3] Dassen T,Parchen R,Bruggeman J,et al.Results of a wind tunnel study on the reduction of airfoil self-noise by the application of serrated blade trailing edges[C]//Proceeding of the European Union Wind Energy Conference and Exhibition.Gothenburg:National Aerospace Laboratory NLR,1996:800-803.
[4] GRUBER M,AZARPEYVAND M,JOSEPH P F.Airfoil trailing edge noise reduction by the introduction of sawtooth and slitted trailing edge geometries[J].Drug Metabolism&Disposition,2010,32(3):576-579.
[5]仝帆,乔渭阳,王良锋,等.仿生学翼型尾缘锯齿降噪机理[J].航空学报,2015,36(9):2911-2922.
[6]李福新,石秀华,张宇文.转捩区长度对回转体流噪声的影响[J].应用声学,2000,19(3):28-32.
[7] LARDEAU S,LESCHZINER M,ZAKI T.Large eddy simulation of transitional separated flow over a flat plate and a compressor blade[J].Flow Turbulence&Combustion,2012,88(1-2):19-44.
[8]刘飞,胡亚涛,刘敏,等.平板前缘分离抑制的周期性激励研究[J].工程热物理学报,2010,31(1):36-39.