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首页> 外文期刊>Journal of Heat Transfer >Heat-Transfer Enhancement by Chaotic Advection in the Eccentric Helical Annular Flow
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Heat-Transfer Enhancement by Chaotic Advection in the Eccentric Helical Annular Flow

机译：偏心螺旋环形流中混沌对流增强传热

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摘要

Chaotic advection in the eccentric helical annular heat exchanger is investigated as a means to enhance its thermal efficiency. Chaotic streak lines are generated by steadily rotating one boundary while the other is counter-rotated with a time-periodic angular velocity. The effects of the eccentricity ratio and modulation frequency on the heat-transfer rate are analyzed by numerically solving the 3D convection-diffusion equation for a broad range of parameter values. For the frequency range over which chaotic advection can be effectively promoted, the efficiency of the heat exchanger is enhanced over that obtained for steady boundary rotation. Other tools, such as stretching field calculations and streak-line plots, applicable for dissipative dynamical systems, are implemented. These tools qualitatively confirm the quantitative heat-transfer results obtained.
机译：研究了偏心螺旋环形换热器中的混沌对流问题，以提高其热效率。稳定地旋转一个边界，而另一边界以时间周期角速度反向旋转，则产生了混沌条纹线。通过数值求解各种参数值的3D对流扩散方程，分析了偏心率和调制频率对传热速率的影响。对于可以有效地促进混沌对流的频率范围，热交换器的效率比稳定边界旋转获得的效率有所提高。实现了适用于耗散动力系统的其他工具，例如拉伸场计算和条痕线图。这些工具定性地确认了获得的定量传热结果。

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