压电式合成射流致动器的设计与实验研究

Design and Experimental Research on Piezoelectric Synthetic Jet Actuator

采用两种不同的压电陶瓷片制作了压电振子,基于压电振子设计了不同喷口形式和压电振子布局形式的合成射流致动器。实验中利用热线风速仪对致动器喷口中心的速度进行了测量。结果表明,所设计的合成射流致动器喷口峰值速度达22.55m/s,致动器典型布局时方形缝倾斜角对喷口峰值速度影响较大,90°法向射流比45°倾斜射流能获得更大的喷口动能,射流法向喷出时致动器典型布局比侧面布局能获得更多的喷口动能。

Synthetic jet actuator was designed by different form of the vents and layout of the piezoelectric vibrators,which was designed by two different piezoelectric ceramics. The hot wire anemometry was used to measure the velocity in the vent center flow from the actuator. Results showed that the peak-value velocity of designed synthetic jet actuator was 22.55 m/s. The jet angle of inclination was an important factor to the peak-value velocity of synthetic jet actuator designed by the piezoelectric vibrators typical layout. More kinetic energy was acquired at 900 jet angle than 450 jet angle. The layout form of the piezoelectric vibrators was another important factor of the peak-value velocity of synthetic jet actuator;more kinetic energy was acquired by typical layout than side layout.