论文部分内容阅读
通过搭建基于制冷循环的喷雾冷却实验台,实验研究了润滑油对喷雾冷却流动性能和换热性能的影响。冷却液中含油量的增加会使得冷却液流经喷嘴时的阻力增加,流量减小;随着含油量的增加,热源表面温度呈微小下降趋势,这一现象在热流密度越高时越明显,系统换热系数随含油量增加呈增大趋势,在含油量达到7.2%时,系统换热系数增加了3000W/m2K,表明润滑油的存在使得流动沸腾得到强化,有利于喷雾冷却换热能力的提高。
By setting up a spray cooling experimental bench based on refrigeration cycle, the influence of lubricating oil on spray cooling flow and heat transfer performance was experimentally studied. The increase of oil content in the coolant leads to the increase of the resistance of the coolant flowing through the nozzle and the decrease of the flow rate. With the increase of the oil content, the surface temperature of the heat source decreases slightly, which becomes more obvious when the heat flux density is higher. The system heat transfer coefficient increases with the increase of oil content. When the oil content reaches 7.2%, the heat transfer coefficient of the system increases by 3000W / m2K, which indicates that the existence of lubricating oil enhances the flow boiling and is conducive to the ability of spray cooling heat exchange improve.