梯形硅基微通道热沉流体流动与传热特性研究  

Flow and Heat Transfer Characteristics for Water in a Trapezoidal Silicon Microchannel Heat Sink

作　　者：夏国栋[1] 柴磊[1] 齐景智[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124

出　　处：《北京工业大学学报》2011年第7期1079-1084,共6页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(50876003);北京市自然科学基金项目(3092009);北京市属高等学校人才强教计划项目(PHR200906104)

摘　　要：以去离子水为流动工质,对梯形截面的硅基微通道热沉进行了流体流动与传热的实验研究.通过测量流体的流量、进出口压降与温度、热沉底面加热膜温度,获得了梯形硅基微通道热沉在不同体积流量、不同加热功率条件下流体流动与传热特性参数.实验得出,梯形微通道的流体传热特性值与经验公式预测值相比存在明显的差异,梯形微通道角区对流体流动与传热有重要影响.最后,在实验基础上根据经验公式修正得出层流条件下的梯形硅基微通道的对流换热关联式.Experiments on friction factor and heat transfer performances are conducted in a trapezoidal silicon microchannel heat sink with deionized water as working fluid. The flow and heat transfer parameters are obtained in different volume flowrate and different heat flux, along with simultaneous measurement of the pressure and temperature. It is found that the heat transfer characteristics in trapezoidal silicon microchannels deviated from theoretical predictions for conventional channels. The corner between the side wall and the bottom wall has an significant influence on the flow and heat transfer performances. Based on the test results, a modified relation for the heat transfer characteristics of trapezoidal silicon microchannel heat sink is obtained.

关 键 词：梯形硅基微通道 摩擦阻力系数 传热特性 

分 类 号：TK124[动力工程及工程热物理—工程热物理]