Theoretical modeling of vectoring dual synthetic jet based on regression analysis
Theoretical modeling of vectoring dual synthetic jet based on regression analysis
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DOI：
10.1016/j.cja.2020.07.020
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发表时间：
2020-08
影响因子：
5.7
通讯作者：
Zhijie Zhao;Zhen-bing Luo;Xiong Deng;Zhiyong Liu;Shiqing Li
中科院分区：
文献类型：
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作者：
Zhijie Zhao;Zhen-bing Luo;Xiong Deng;Zhiyong Liu;Shiqing Li
双合成射流(DSJ)优异的矢量特性为主动流动控制提供了新的控制策略，如推力矢量控制、大面积冷却、分离流动控制等。针对不可压缩流动，基于理论和回归分析，建立了作动器结构参数、驱动参数、压电振膜材料属性等源变量对矢量DSJ的影响关系和理论模型，并通过数值模拟进行了验证。两种合成射流可被视为具有较高射流速度的主流和具有较低射流速度的干扰流。结果表明,影响因素包括扰动流出口处形成的低压区对矢量偏转的促进作用、扰动流的冲击作用和主流对矢量偏转的抑制作用。矢量角是一个由所有源变量耦合的复杂参数。详细的理论模型误差控制在3.6度以内，可用于定量评估DSJ的矢量特性，从而为主动流量控制中的控制律设计提供指导。
The excellent vectoring characteristic of Dual Synthetic Jet (DSJ) provides a new control strategy for the active flow control, such as thrust vectoring control, large area cooling, separated flow control and so on. For incompressible flow, the influence relation of source variables, such as structure parameters of actuators, driving parameters and material attributes of piezoelectric vibrating diaphragm, on the vectoring DSJ and a theoretical model are established based on theoretical and regression analysis, which are all verified by numerical simulations. The two synthetic jets can be deemed as a main flow with a higher jet velocity and a disturbing flow with a lower jet velocity. The results indicate that the influence factors contain the low-pressure area formed at the exit of the disturbing flow, which could promote the vectoring deflection, and the impact effect of the disturbing flow and the suppressive effect of the main flow with the effect of restraining the vectoring deflection. The vectoring angle is a complex parameter coupled by all source variables. The detailed theoretical model, whose error is controlled within 3.6 degrees, can be used to quantitatively assess the vectoring feature of DSJ and thus to provide a guidance for designing the control law applied in the active flow control.