非对称出口合成双射流激励器矢量特性实验研究

doi:10.7527/S1000-6893.2014.0063

Abstract

Abstract:

The unique vectoring characteristic of dual synthetic jets (DSJ) actuator provides a new way for the synthetic jet technology applied to active flow control. The paper employs a new method to evaluate the vectoring angle of dual synthetic jets based on the velocity vectors in the potential core. The effects of driving parameters (driving voltage and frequency) of piezoelectric dual synthetic jets actuator with asymmetric exits are studied using schlieren and particle image velocimetry (PIV) experiments. The results indicate that dual synthetic jets deflects towards the side of slot with larger sectional area. The vectoring angle gradually increases and then rapidly decreases with the variation of the driving voltage. There is an optimal driving voltage at which the vectoring angle reaches a maximum. The effect of the driving frequency on the vectoring angle is remarkable and complicated. The vectoring angle can be adjusted from 1.53°to 36.65°. There are two peaks of the vectoring angle with the variation of the driving frequency. The minimum vectoring angle is attained when the driving frequency approximates the resonance frequency of the vibrating diaphragm.

Key words: dual synthetic jets, vectoring characteristic, vectoring angle, schlieren, PIV experiment

CLC Number:

V211
O358

DENG Xiong, XIA Zhixun, LUO Zhenbing, LI Yujie. Experimental investigation on the vectoring characteristic of dual synthetic jets actuator with asymmetric exits[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015, 36(2): 510-517.

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Experimental investigation on the vectoring characteristic of dual synthetic jets actuator with asymmetric exits

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