【摘要】 建立了烧结型表面多孔管多孔层的理论模型,应用Fluent软件对去离子水在烧结型表面多孔管和光滑管竖直管内的流动沸腾进行数值模拟,得到了不同流速下的气相体积分布云图和压力场云图,并利用场协同原理分析了管内的速度、温度场。结果表明,烧结型表面多孔管具有良好的强化沸腾传热性能,同时并未大幅度增加管内压力降。此外还分析了不同体积流速对沸腾汽化量的影响,研究表明,对于同一管型,管内流速越小,汽化量越大。更多还原

【Abstract】 A theoretical model for the porous layer of sintered porous surface tubing(SPST) was established to simulate the flow boiling performances of cooling water in SPST and smooth tube based on Fluent software;and the cloud figures of gas volume distribution and pressure were got under different fluid velocities,including analysis of the velocity and the temperature by field synergy principle.The results show that SPST can enhance the heat flux and influence the pressure drop not too much.Analyzing different pipe flow influences on the vaporization proves the smaller the pipe flow,the greater the vaporization.更多还原