提高表面活性剂减阻溶液传热研究进展

Enhancing heat transfer ability of drag reducing surfactant solution

分析总结了表面活性剂减阻溶液的传热特性和提高传热特性的方法,介绍了各种方法提高传热的机理。对各种方法取得最佳效果作了比较,分析了各种方法的影响因素及优缺点。分析表明,表面活性剂溶液与水的温度分布不同,存在双热边界层,热阻不在近壁层,是在10<y+<100的过渡层;提高传热的方法可概括为破坏胶束结构、制造湍流和强化传热的过程。同时,对今后改善传热提出了自己的看法。

Heat transfer characteristics and enhanced heat transfer methods were summarized. Mechanism of enhancing heat transfer was analyzed. The most effective results, influence factors, and merits and drawbacks of each method were compared. The results showed that the mean temperature distribution of surfactant solution was completely different from that of water. In the surfactant solution there were two thermal boundary layers. The largest heat resistance was not in the near wall region but in the buffer layer region where y＋ ranged from 10 to 100. The method of enhancing heat transfer ability of the drag reducing surfactant solution was summarized as a general process, in which the microstructure of the surfactant solution was broken to yield turbulent flow, and thus enhancing heat transfer. Some views and suggestions on enhancing heat transfer ability of drag-reducing flow were presented.