中文摘要：

合成射流器的设计与仿真是优化其性能参数的关键。针对目前合成射流器的计算模型在建立物理模型时存在简化误差而导致仿真精度降低的问题，提出了一种基于多域耦合分析的全流场计算模型。该模型采用通用有限元分析软件ANSYS中的压电耦合单元实现电场一结构场的直接耦合分析，并通过ANSYS与流体仿真软件CFX间的耦合接口完成流场一结构场的同步双向耦合，最终实现了压电式合成射流器真实物理过程的数值模拟。基于此模型对合成射流器的工作过程进行了模拟，并研究了驱动电压和腔体结构参数对喷口速度的影响。结果表明：多域耦合模型能准确模拟合成射流的形成过程，数值模拟与实验结果的变化趋势一致，且相对误差不超过8％，为合成射流器的优化设计及控制提供了理论依据。

英文摘要：

The design and simulation of a synthetic jet actuator play a crucial role in the optimization of its performance parameters. Due to the fact that there exist simplification errors in current analysis models of the synthetic jet actuator in establishing a physical model, which leads to decreasing of the accuracy in simulation, a multiple-domain coupling analysis model is proposed for the synthetic jet actuator. With the piezoelectric coupied elements in the finite element analysis software ANSYS, the piezoelectric vibrator involved in the direct coupling of the structural and electric fields is analyzed. Through the interface between ANSYS and CFX, the synchronized bidirectional coupling of the structural and flow fields is achieved, and the simulation of the real working process of the piezoelectric synthetic jet actuator is realized. Based on this model, the formation of the synthetic jet is simulated and the influences of voltage amplitude and geometrical parameters on synthetic velocity are investigated. The results show that the multiple-domain coupling analysis model can simulate the formation of synthetic jet accurately, and the simulation results agree well with experiment data, with an relative error of less than 8~. This multiple-domain coupling analysis model may provide theoretical foundations for the experimental parameter determination and the optimal design of synthetic jet actuators.