| 振动扰流片旋涡脱落和时均压力实验研究 |
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| 引用本文： | 刘谋佶,刘德沛.振动扰流片旋涡脱落和时均压力实验研究[J].北京航空航天大学学报,1990(2):50-55. |
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| 作者姓名： | 刘谋佶 刘德沛 |
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| 作者单位： | 北京航空航天大学飞行器设计与应用力学系
(刘谋佶)，北京航空航天大学飞行器设计与应用力学系(刘德沛) |
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| 摘 要： | 本文叙述了低速风洞中静止和振动扰流片振频,振幅与流速等对其后的压力频谱、旋涡脱落、共振与时均压力等的影响。静止时有一个明显自然脱落主频。振动时有两个旋涡脱落频率,有时两者合一。旋涡脱落主频有三种类型:它们分别等于自然脱落主频与振频,以自然脱落主频振动时,上述三种频率相等,产生强共振,此时,其负压值比静止时还大。相位平均压力波动比扰流片振动在相位上有滞后。
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| 关 键 词： | 低速风洞 扰流片 旋涡 压力实验 |
VORTEX SHEDDING AND TIME MEAN PRESSURE BEHIND OSCILLATING SPOILERS |
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| Liu Mouji Liu Depei.VORTEX SHEDDING AND TIME MEAN PRESSURE BEHIND OSCILLATING SPOILERS[J].Journal of Beijing University of Aeronautics and Astronautics,1990(2):50-55. |
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| Authors: | Liu Mouji Liu Depei |
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| Institution: | Department of Flight Vehile Design and Applied Mechanics |
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| Abstract: | Pressure spectra,vortex shedding resonance and pressure measurements behind spoilers at rest and oscillation were studied in low-speed wind tunnel at Beijin University of Aeronautics and Astronautics.A well defined main frequency and its harmonics exists behind spoiler at rest.Two frequencies with different amplitudes and their harmonics appear at high or low oscillating frequencies.They are approached and merged together at medium oscillating frequencies.Three types of main vortex shedding frequencies are suggested.Time mean suction peak induced by oscillating spoiler at resonance is higher than that of spoiler at rest.Phase mean pressure is discussed. |
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| Keywords: | driven separated flow oscillating spoiler vortex shedding pressure measurement |
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