对不同工况下不同浓度和配比的CTAC减阻流体在二维流道中的减阻性能和传热性能进行了试验测试。结果表明,在减阻流体流动达到临界雷诺数之前,传热性能下降率随雷诺数的增大逐渐增大,在达到临界雷诺数之后,传热性能急剧增强;传热性能下降率与减阻率变化趋势相同;减阻流体的温度梯度在过渡层比水大,在湍流核心区比水小。
Experimentally investigates the drag-reducing and heat transfer performances of cetyltrimethyl ammonium chloride(CTAC)surfactant solution with different concentrations and mixture ratios under different conditions in a two-dimensional channel.The results indicate that the heat transfer reduction rate of the CTAC drag-reducing fluid increases with Reynolds number when Reynolds number is below the critical value and decreases rapidly when Reynolds number exceeds the critical value,the trends of heat transfer reduction rate and drag reduction rate are similar,and the temperature gradient of the CTAC drag-reducing fluid is larger than that of water in buffer layer and smaller than that of water in turbulent core area.