摘要
研制了适用于产生空气超声相位光栅的大功率高频超声换能器,采用位移灵敏接收器,在换能器发射面前方适当位置加声匹配器以加强声场干涉提高发射方向性,获得了明显的激光空气超声声光偏转效应。可应用于风洞试验中测量空气旋涡流场参量.
A high power, high frequency air ultrasonic transducer used to generste air ultrasonic Phase grating is fabricated. The laser ultrasonic acousto-optic deflection has been observed clearly by using a displacement-sensitive detector and a particularly ptepated acoustic coupler setting at a proper place in front of the acoustic radiating surface of the transducer to increase the interference of acoustic field and to decrease the divergence angle of acoustic radiation. It can be applied to measure the parameters of the air vortex flow field in wind tunnel test.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1995年第9期691-694,共4页
Chinese Journal of Lasers
关键词
流场
测量
声光偏转效应
超声波
激光
laser acousto-optic deflection in air, air ultrasonic traneducer with high frequency, flow field measurement