脉动热管运行可视化及传热与流动特性的实验研究  

Experimental Investigation of the Visualization of Pulsating Heat-pipe Operation as well as Heat Transfer and Flow Characteristics

作　　者：曹小林[1] 席战利[1] 周晋[2] 晏刚[2] 

机构地区：[1]中南大学能源与动力工程学院,湖南长沙410083 [2]西安交通大学制冷与低温工程系,陕西西安710049

出　　处：《热能动力工程》2004年第4期411-415,共5页Journal of Engineering for Thermal Energy and Power

摘　　要：对脉动热管的运行进行了可视化实验 ,在不同的充灌率、倾角、截面形状、加热量条件下对脉动热管的运行进行了测试 ,实验结果表明 :脉动热管是一种十分有效的散热技术 ;脉动热管存在传热极限 ;在最佳充灌率 (5 0 % )和最佳倾角 (5 0°)下运行的脉动热管传热极限最高 ,高热流密度下的传热热阻最低 ;当热流密度较小时 ,三角形通道的脉动热管要优于正方形通道的脉动热管 ,但当热流密度较大时 ,通道形状对热阻和单位截面传热极限影响不大 ;A visualization experiment is conducted with respect to the operation of pulsating heat pipes. Under different conditions of filling rate, inclination angles, section shape and heating rate, tests are conducted on the operation of the pulsating heat pipes. The results of the tests indicate that the pulsating heat pipes represent a kind of very effective heat dissipation technology. There exists a heat transfer limit for the pulsating heat pipes. During operations at an optimum filling rate (50%) and an optimum inclination angle (50°), the pulsating heat pipes have a maximum heat transfer limit with a minimum heat transfer resistance under a high heat flux density. In the case of a relatively small heat flux density the pulsating heat pipe with a triangular channel will be superior to that with a square-shaped channel. However, when the heat flux density is relatively great, the shape of the channel will not have any significant influence on heat resistance and unit section heat-transfer limit. The size of the channel exercises a very small influence on the thermal performance of the heat pipes.

关 键 词：脉动热管 可视化 运行机理 

分 类 号：TK124[动力工程及工程热物理—工程热物理]