A test facility was built to investigate the cooling effects of a piezoelectric fan on a heated flat plate in a quiescent atmosphere. The facility consists of a heat source of a thin Ni-Cr foil and a piezoelectric fan for cooling the foil, where the surface temperature on the foil was measured by an IR camera. 3D unsteady numerical simulations were then conducted to analyze the relationship between the jet flow from the piezoelectric fan and the temperature distribution on the heated plate. The measured temperature data was used for validation of the numerical results. Without the fan, the temperature is highest at the center of the plate and lowers toward the plate edge. With the operation of the fan, the temperature at the center of the plate is locally reduced by 28 °C. Based on the experiments and simulations, it is confirmed that the piezoelectric fan is very effective to cool the plate locally. In addition, it was found that the local convective heat transfer coefficient is closely related to the movement of the vortices generated by the fan.

建立了一个测试设施，以研究在静态气氛中压电风扇在加热平板上的冷却效果。该设备由一个薄薄的Ni-Cr箔片的热源和一个用于冷却箔片的压电风扇组成，在那里用IR摄像机测量箔片上的表面温度。然后进行了3D非稳态数值模拟，以分析压电风扇的射流与加热板上温度分布之间的关系。测得的温度数据用于数值结果的验证。如果没有风扇，则温度在印版中心最高，并朝印版边缘降低。随着风扇的运行，板中心的温度局部降低了28°C。根据实验和模拟，可以确定的是，压电风扇非常有效地局部冷却板。另外，发现局部对流传热系数与风扇产生的涡流的运动密切相关。