新型双出口合成射流激励器的流场特征研究

设计了一种新型双出口合成射流激励器,应用非接触粒子图像激光测速技术（PIV）,测试了激励器出口的流场特性,包括瞬态和时均流动结构。结果表明,相比常规合成射流激励器,新型激励器一侧出口呈现为明显抽吸作用,另一侧出口流动带有合成射流流场特征,在出口下游得到一股放大了的单方向射流。新型合成射流激励器单侧出口的抽吸作用,在常规激励器基础上形成新的流体＂微泵＂工作机制,不仅放大了合成射流能量大小,同时实现了不同区域内流体的＂定向输运＂,其外流场特性更加有利于边界层分离、射流矢量偏转等主动流动控制。

The flow field characteristics of novel synthetic jet actuator with double outlet

Designed a novel synthetic jet actuator with double outlets,and tested the flow field characteristics of the actuator exits,including both phase-locked instantaneous and ensemble-averaging flow field structure,applying non-contact particle image velocimetry（PIV）.The results show that there is an obvious suction effect in one of the actuator outlets,and a centralized jet is formed downstream the other outlet,with the characteristics of synthetic jet flow field.The suction effect of novel synthetic jet actuator formed a new ＂micro-pump＂ working mechanism on the basis of conventional actuator,not only amplifying the energy of synthetic jet,but also realizing the directional fluid transportation in different regions.These characteristics of external flow-field will be more conducive to the flow control such as jet vector control or boundary layer separation control.