基于主动流动控制的射流矢量偏转技术

On the Jet Vector Deflection based on Active Flow Control Technique

本文介绍了一种基于主动流动控制技术的射流矢量偏转新方法和控制思路。通过在主射流出口两侧加装斜置扩张固壁板来降低射流两侧与固壁边界间的流体压力,将射流偏转由"不敏感-难控"转变成"敏感-易控",再在固壁板布置自行研制的斜出口合成射流激励器对主射流进行比例偏转控制。实验结果表明,射流最大偏转角可达15°。此外还研究了激励位置角度、激励频率、激励电压不同工作参数对射流矢量偏转控制的影响,实现了主射流偏转角的比例控制。当合成射流与主射流动量比为1∶43时,主射流偏转角可达13°,合成射流激励器消耗的能量为1.5W,初步实现了以小的能量消耗获取高的控制效益。

This paper presents a new method and control consideration of jet vector deflection based on active flow control technique. The idea that to change jet flow from ＂insensitive and difficult to control＂ into ＂sensitive and easy to control＂ was implemented by using side wall. Specifically, obliqueexpending solid wall plates are mounted on both sides of primary jet nozzle to reduce the fluid pressure between jet and solid boundary, the jet vector control is realized. Then, the primary jet proportional deflection is controlled by the home-made beveled synthetic jet actuators flush mounted on solid wall.Test results show that maximum jet deflection angle has reached 15° and the primary jet proportionaldeflection control has achieved. In addition, the different actuator position angle, the excitation frequency, the effect of working parameters of excitation voltage on excitation effect were studied as well. In the case of momentum ratio between synthetic jet and primary jet flow is 1：43, the primaryjet deflection angle may achieve 13°, but synthetic jet actuators consume energy power is only 1.5W. Thus, the high efficient controlling of jet deflection realized with small energy consumption.