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Numerical investigation and feasibility study of a PZT-driven micro-valve pulsed-jet actuator

机译：PZT驱动微阀脉冲喷射执行器的数值研究和可行性研究

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A micro-valve pulsed-jet vortex-generator driven by piezoelectric actuation was successfully modelled numerically to determine the feasibility of such a design. This includes: modelling the dynamic motion of a unimorph cantilever and the fluid-structure interaction occurring between the unimorph and the fluid flowing over such a structure; the unsteady developing channel flow that would occur through the outlet orifice was also modelled. The initial design was found to have several fundamental flaws that were shown to be easily remedied. The fluid-structure interaction was found to have a strong effect on the motion of the piezoelectric beam and therefore the performance of the pulsed-jet actuator. The response time of the actuator was found to be governed by the micro-valve opening rather than the time taken to establish the jet. However, the resistance of the pulsed-jet actuator was shown to be governed by the outlet orifice; it was an order of magnitude larger than the resistance of the micro-valve.
机译：成功地对由压电致动驱动的微阀脉冲喷射涡流发生器进行了数值建模，以确定这种设计的可行性。这包括：对单压电晶片悬臂的动态运动以及在单压电晶片和在这种结构上流动的流体之间发生的流固耦合进行建模;还对通过出口孔会发生的不稳定的显影通道流动进行了建模。发现最初的设计存在一些基本缺陷，这些缺陷很容易纠正。发现流体-结构相互作用对压电束的运动有很大影响，因此对脉冲喷射致动器的性能有很大的影响。发现执行器的响应时间取决于微型阀的打开，而不是取决于建立喷嘴的时间。但是，脉冲喷射执行器的电阻显示为受出口孔的控制。它比微型阀的阻力大一个数量级。

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