| FREQUENCY LOCK—IN PHENOMENON OF FLAPPING MOTION WITH SURFACE WATER WAVE |
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| 作者姓名： | HsuChintsau KuangJun SunJianhong |
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| 作者单位： | [1]DepartmentofErgonomicsandEnvironmentalEngineering,NUAA29YudaoStereet,Nanjing210016,P.R.China [2]DepartmentofMechanicalandAerospaceEngineering,USC,LA,California,USA [3]DepartmentofMechanicalEngineering,HKUST,ClearWaterBay,HongKong,P.R.China |
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| 摘 要： | To study the effect of a progressive surface wave on the flapping motion of a vertical turbulent plane jet in shallow water,the laser visualizations and measurements were carried out in a water tank.The images of visualization by laser-induced fluorescence(LIF)technique show that the jet flapping motion occurs in the wave environ-ment.Using the wave height gauge and laser Doppler velocimetry(LDV) ,experimental results show that the jet flapping motions indeed lock-in to the wave oscillations if the wave frequency is close to but lower than the nature frequency of jet flapping motion.The phenomenon does not occur when the wave frequency is above the nature frequency of jet flapping motion.
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| 关 键 词： | turbulent plane jet surface water wave LDV flapping motion lock－in phenomenon 湍流 表面波 激光测量 频率锁定 平面射流 振翅运动 |
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