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中文摘要：
对圆管内添加两种宽度的十字形扭带的强化传热进行了数值模拟,对传热与阻力特性和PEC值进行了比较分析,模拟结果表明：通过减小十字形扭带的宽度使换热管内流体核心区域扰动,在紊流区域能在换热强化减小不大的情况下有效减小流体阻力,从而能提高换热管的性能。
英文摘要：
Numerical simulation of heat transfer enhancement by adding cross twisted-tapes of two different widths in the circular tubes was performed. The character of heat transfer and flow resistant as well as the PEC value were analyzed with comparison. The results showed that the flow resistant was reduced considerably with slight reduction of the heat transfer in the turbulent flow when the cross twisted-tape width was reduced, accordingly, the thermal performance factor was augmented.
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