航空电子设备集成度和封装密度的增加给电子元器件的热控制问题带来了严峻的挑战 ,微槽散热器是解决航空电子元器件散热的一条有效途径。本文设计制作了 6种不同结构尺寸微矩形槽道 ,采用航空电子设备上最常用的乙醇溶液作为冷却工质 ,进行了微槽道内单相强迫对流换热性能实验 ,分析了流体流速、过冷度和微槽结构等对传热特性的影响 The increase of avionics integration and packaging density poses a serious challenge to the thermal control of electronic components. Micro-slot radiator is an effective way to solve the heat dissipation of avionics. In this paper, we design and manufacture six kinds of micro-rectangular channels with different structure sizes. Using the most commonly used ethanol solution on avionics as a cooling medium, experiments were carried out on single-phase forced convection in microchannels. The effects of fluid velocity, Degree and micro-groove structure on the heat transfer characteristics