温度和雷诺数对表面活性剂溶液传热的影响

对不同温度和雷诺数下阳性离子表面活性剂十六烷基三甲基氯化铵(CTAC)溶液在循环回路中的传热特性进行了实验研究。在水中加入表面活性剂后溶液的传热特性明显降低,在不同的温度工况下均存在一个临界雷诺数,随着溶液温度的改变而发生变化。在不同的实验浓度条件下均存在一个临界温度,在临界温度以下时,临界雷诺数随温度升高而增加;在临界温度以上时,临界雷诺数随温度升高而急剧下降。分析该表面活性剂溶液阻力减小和传热性能降低之间的关系,提出了通过对溶液温度的控制来改变减阻流体传热特性的方法。

Effects of Temperature and Reynolds Number on Heat Transfer of Surfactant Solution

Experiments were conducted to study the heat transfer characteristics of a cationic surfactant solution,Cetyltrimethyl ammonium chloride(CTAC) in a closed loop system.It was found that the heat transfer performance is deteriorated by adding surfactant into water,and there exists a critical Reynolds number which changes with changing solution temperature.There exists a critical temperature at different solution concentrations.The critical Reynolds number increases with increasing solution temperature when the solution temperature is lower than the critical temperature;whereas it decreases rapidly when the solution temperature exceeds the critical temperature.A method of changing heat transfer performance of surfactant drag-reducing flow by controlling temperature was proposed through analyzing the relationship between drag reduction and heat transfer reduction of surfactant solution.