本文采用LES/FW-H的匹配方法,研究了开式轴流风扇内部旋涡流动特征及其与叶片表面干涉引起的气动噪声之间的联系,同时进行了远场噪声预测,探讨了叶轮不同表面辐射噪声时的频谱分布特征.研究结果表明,开式轴流风扇吸力面附近形成的叶尖涡和前缘分离涡在吸力面叶片表面相应位置形成大压力波动,形成主要噪声源;叶片吸力面的辐射噪声可以通过改善吸力面附近的旋涡流动来降低;低速轴流叶轮由叶轮壁面辐射的噪声以宽频成分为主.
参考文献
| [1] | Akaike S;Kitada M;Matsushima T et al.Noise Reduction of Automotive Cooling Fans(2nd Report)[J].JSME International Journal,1993,B59(558):447-452. |
| [2] | Shigeru AKAIKE;Koji KIKUYAMA;Motohiro KITADA;Kazutoshi KUWAYAMA .Study of Rotational Noise Reduction for Axial Flow Fan (Analysis and Estimation of Secondary Fan-Noise Component)[J].JSME International Journal, Series B. Fluids and Thermal Engineering,1996(3):590-596. |
| [3] | Zheng Zh M;Sato S;Kinoshita K.Experimental Study on Low Noise Propeller Fans (Noise Reduction by Caving Dimples on Suction Sides of Blades)[J].ASME Fluids Engineering Division Conference,1996(237):61-67. |
| [4] | Fleig O;Lida M;Arakawa C .Wind turbine blade tip flow and noise prediction by large-eddy simulation[J].Journal of Solar Energy Engineering,2004(4):1017-1024. |
| [5] | Young J. Moon;Yong Cho;Hyun-Sik Nam .Computation of unsteady viscous flow and aeroacoustic noise of cross flow fans[J].Computers & Fluids,2003(7):995-1015. |
| [6] | Yong Cho;Young J.Moon .Discrete Noise Prediction of Variable Pitch Cross-Flow Fans by Unsteady Navier-Stokes Computations[J].Journal of Fluids Engineering: Transactions of the ASME,2003(3):543-550. |
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