实验和计算都发现高Re数(自模化区)风机的宽频噪声占有大部分频域，而低Re数(非自模化区)下离散噪声占主导地位。优化设计结果表明对低Re数的动叶必须进行修正，低Re数弯掠动叶与高Re数相比，需要更大的弯角和掠角才能达到气动—声学性能的最佳值
Experimental and computational results ofaerodynamic--aeroacoustic performance in an axial-flow fan show that thebroadband noise exists in most part frequency domain in self-stimulateddomain (high Re). The interaction noise appears almost frequency spectrumin low Re condition. The design optimization is analyzed. In order to obtainthe optimum value of aerodynamic--aeroacoustic property, a larger skew angleand a larger sweep angle are obtained in a small-scale fan of low Re
参考文献
| [1] | Hah C;Wennerstorm A J .Three-Dimensional Flow Fields Inside aTransonic Compressor with Sweep Blades[R].ASME Paper 90-GT-359,1990. |
| [2] | T. Sasaki;F. Breugelmans .Comparison of sweep and dihedral effects on compressor cascade performance[J].Journal of turbomachinery,1998(3):454-464. |
| [3] | Weingold H D;Neubert R J;Behlke R F .Bowed Stator: An Example ofCFD Applied to Improved Multistage Compressor Efficiency[J].Journal of Turbomachinery,Transactions of the ASME,1997,119(02):161-168. |
| [4] | 蔡娜;钟芳源 .轴流式弯掠动叶变工况气动—声学性能的实验研究[J].工程热物理学报,1996,17(03):280-285. |
| [5] | 蔡娜;李地;陈康民 .非自模化和自模化区域内轴流动叶气动－声学性能的实验研究[J].工程热物理学报,1998,19(04):454-458. |
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