【摘要】 利用热线风速仪,测量了某受激扬声器产生的合成射流的速度大小。详细测量了频率、功率、波形、空间距离等对合成射流平均速度、最大速度的影响。测量结果表明,所研究的合成射流激励器能够产生很大的射流速度:平均速度与最大速度分别达到42.5m/s和117m/s。合成射流速度强烈依赖于激励频率,测得3个共振频率分别为750Hz,1600Hz和2700Hz,在偏离共振频率时合成射流速度迅速减弱。更多还原

【Abstract】 Measurements of the velocity field in a synthetic jet emanating from a special excited speaker are conducted by hot-wire anemometer.The effect of excitation frequency,power,waveforms(sine wave,triangle wave,square wave),and spatial locations are examined in detail.The results show that time-averaged velocity and maximum velocity are up to 42.5m/s and 117m/s,respectively.The velocity of synthetic jet depends on excitation frequency strongly.There are three resonance frequencies(750Hz,1600Hz,2700Hz) and the velocity diminishes sharply when the excitation frequency is deviated from the resonance frequencies.更多还原