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合成射流激励器射流矢量控制具有对吸气式发动机进气道出流和发动机喷管流动进行矢量控制的潜力。通过对四种不同出口构型合成射流激励器控制主流矢量偏转的数值模拟和分析,对合成射流控制主流矢量的发展过程进行了研究。结果表明:合成射流控制主流矢量的发展过程可分为三个不同阶段,第一阶段,在主流通道内,激励器工作引起的主流通道压强梯度形成的侧向力致偏主流,在出口处主流矢量偏转Ⅰ;第二阶段,在主流出口附近,合成射流对主流的卷吸作用和引射作用,致偏主流Ⅱ;第三阶段,在出口下游,合成射流与主流自由剪切层发生相互耦合作用,致偏Ⅲ。因此,主射流最终偏转角度是其在经历三个不同阶段时受到的合成射流致偏作用之和,即=Ⅰ+Ⅱ+Ⅲ。
The synthetic jet actuator jet vector control has the potential to vector control the aspirated engine inlet flow and the engine nozzle flow. Through the numerical simulation and analysis of the main vector deflections controlled by four kinds of jet actuators with different outlet configuration, the development of the mainstream vector of synthetic jet control is studied. The results show that the development process of synthetic jet control mainstream vector can be divided into three different phases. In the first phase, the lateral flow induced by the pressure gradient of the main channel caused by the actuator working in the main channel leads to the main flow, The second stage, near the main outlet, the synthetic jet on the mainstream of the entrainment effect and the role of injection, the main partial flow Ⅱ; the third stage, downstream of the exit, synthetic jet and the mainstream of free shear layer occurs Mutual coupling effect, caused partial Ⅲ. Therefore, the final deflection angle of the main jet is the sum of the biased effects of the synthetic jet when it is subjected to three different phases, ie = Ⅰ + Ⅱ + Ⅲ.