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采用等效比热法对功能流体在光滑直圆管和三种内嵌同轴圆柱的圆管内的流动和传热特性进行了数值模拟,并利用场协同理论对流场进行了分析.结果表明,在内嵌同轴圆柱的圆管中,功能流体的传热效果随着Ste数的减小而增大,这与功能流体在光滑直圆管中流动的情况类似,但是与光滑直圆管相比,功能流体在内嵌同轴圆柱的圆管内流动可以明显的提高换热能力,且换热强化随着内嵌圆柱的直径增加而增加,但功耗也明显增加.
The equivalent heat method was used to simulate the flow and heat transfer characteristics of the functional fluid in a smooth straight tube and three kinds of coaxial cylinders with circular cylinders. The flow field was also analyzed by using the field synergy theory. In a coaxial cylinder, the heat transfer efficiency of the functional fluid increases with the decrease of Ste, which is similar to the case of the functional fluid flowing in a smooth straight tube but with a smooth straight tube In contrast, the flow of the functional fluid in the circular tube embedded in the coaxial cylinder can obviously improve the heat exchange capacity, and the heat transfer enhancement increases as the diameter of the embedded cylinder increases, but the power consumption also increases obviously.