同轴径向热管传热特性实验研究

摘要

为了解热管径、轴向外壁温度的分布情况及不同充液率条件下热管的换热系数,对新型碳钢-水同轴径向热管在5种不同充液率下的传热性能进行实验研究,分析不同热流密度下热管管壁的温度分布情况;并根据最小二乘法原理,推导热管传热系数与充液率及热流密度的实验关联式.研究结果表明:在实验条件下,50%充液率的热管传热性能最佳;在不同充液率条件下,热管的换热系数相对误差不超过7.92%.%In order to find out the distribution of temperature on the outer wall and the heat transfer coefficient of heat pipe with different filling rates, the experimental investigation was conducted to study the heat transfer characteristics of five different filling rates of carbon steel-water heat pipe which was radial and coaxial.The temperature on the outer wall during different heat fluxes was collected.According to the principle of the least square method, an experimental correlation was established to reveal the relationship among heat transfer coefficient, working fluid rate and heat flux.The results show that, on the basis of experimental condition, the heat transfer performance of 50％ filling rate of the heat pipe is the best.The errors of the heat transfer coefficient of different heat pipes are within 7.92％.