We report an experimental study on the flow and heat transfer for a single microhole of water spray impingement on an indium tin oxide (ITO) heating plate using a piezoelectric atomizer. A microhole of d_j = 35 µm was used and tested with a volumetric flow rate of 0.22 cm³/min for three different spray heights of 10, 20 and 30 mm and five heater initial temperatures of 25 °C, 50 °C, 100 °C, 150 °C, and 200 °C. Through the optical measuring techniques of the microparticle image velocimetry (μPIV) as well as interferometric particle imaging (IPI) and micro laser-induced fluorescence (μLIF), the velocity field, such as spray centerline velocity, droplet impact velocity and impact crater diameter, including impinged liquid film thickness and heat transfer performance (CHF) can be measured and calculated. The effects of the spray height and initial heater temperature on the flow and thermal characteristics are presented and discussed herein. The experimental results show that both the spray centerline velocity and spray droplet impact velocity were significantly influenced by the initial surface temperature as well as by the spray height. As a result, the cooling performance would be, in turn, affected by the aforesaid two parameters.

我们报告了使用压电雾化器对铟锡氧化物（ITO）加热板上的水喷雾撞击的单个微孔进行流动和传热的实验研究。的d甲微孔_Ĵ使用，并用0.22厘米的体积流率测试= 35微米³/ min，三种不同的喷雾高度分别为10、20和30 mm，以及五个加热器初始温度分别为25°C，50°C，100°C，150°C和200°C。通过微粒图像测速仪（μPIV）的光学测量技术以及干涉式颗粒成像（IPI）和微激光诱导的荧光（μLIF），速度场，例如喷雾中心线速度，液滴撞击速度和撞击坑直径，包括撞击液体膜厚度和传热性能（CHF）在内的所有参数都可以测量和计算。本文介绍并讨论了喷雾高度和初始加热器温度对流量和热特性的影响。实验结果表明，喷雾中心线速度和喷雾液滴撞击速度均受初始表面温度以及喷雾高度的影响。结果，冷却性能将继而受到上述两个参数的影响。