甲醇在改进型机加工多孔管上池核沸腾换热特性的研究

测度了甲醇在９根第二代机械加工表面多孔管（ＪＫ－２管）、１根第一代机械加工表面多孔管（ＪＫ－１管）和１根光滑管上的单管饱和池沸腾传热系数，结果表明，ＪＫ－２管比ＪＫ－１管能更有效地强化甲醇的池沸腾传热。提出了一个简化的池核沸腾强化传热机理，并导出了相应的池核沸腾强化的传热关联式，该关联式与实验数据吻合良好。

Nucleate Pool Boiling Heat Transfer of Methanol on an Improved Type of Mechanically Processed Tubes with Porous Surface

JK-2 tube is the second generation of mechanically processed tube with porous surface, which is higher in boiling heat transfer performance than the first generation of mechanically processed tube with porous surface tube, ie, the JK-l tube. Therefore, the nucleate pool boiling heat transfer coefficients of methanol have been tested for 9 JK-2 tubes, a JK-1 tube and a smooth tube. The results indicate that the JK2 tubes can enhance the nucleate pool boiling heat transfer of methanol than the JK-l tube. A new mechanism of enhanced nucleate pool boiling heat transfer has been proposed, and a corresponding correlation equation for enhanced nucleate pool boiling heat transfer has been developed. The correlation is in good agreement with the experimental data.