论文部分内容阅读
制备了分别具有亲水和疏水特性的2种纳米特性表面,对具有不同固液接触角的传热面上圆柱型高速水喷流沸腾的沸腾临界热流密度(CHF)进行了系统的稳态实验研究,重点考察了喷流速度,过冷度和传热面固液接触角对CHF的影响。通过研究整理了传热面固液接触角和CHF之间的实验关系。对作者过去提出的饱和液与过冷液圆柱喷流沸腾CHF的半理论关系式进行了扩展和改进,使公式扩展到高流速范围和广泛的固液接触角范围。改进的关系式与实验数据符合得很好.
Two kinds of nano-feature surfaces with hydrophilic and hydrophobic properties were prepared respectively. The steady-state experiments were carried out on the critical boiling heat flux (CHF) of cylindrical high-speed water jet boiling on the heat transfer surfaces with different solid-liquid contact angles Research, focused on the jet velocity, supercooling and heat transfer surface solid-liquid contact angle on CHF. The experimental relationship between the solid-liquid contact angle of heat transfer surface and CHF was studied. In the past, the semi-theoretical relationship between the saturated liquid and the bubbling boiling CHF of subcooled liquid was extended and improved, and the formula was extended to the range of high flow velocity and the range of solid-liquid contact angle. The improved relationship is in good agreement with the experimental data.