双向弯曲波浪形微通道的传热与流动特性
Heat Transfer and Flow Characteristics of Bidirectional Curved Wavy Microchannels
摘要: 在圆柱形锂离子电池的热管理系统中，蛇形板散热器因其散热效果好而被广泛应用。为进一步提升传热性能，提出了一种双向弯曲波浪形微通道散热器，通过数值模拟研究了通道结构、振幅和波长对其传热和流动特性的影响。结果表明，缩放结构和平行结构的双向弯曲波浪形微通道有利于改善壁面温度均匀性，其中缩放结构的微通道由于流通截面变化剧烈，局部流体速度显著提高，压降上升，二次流强度增大，传热性能得到强化的同时摩擦阻力也显著增加；当通道振幅为2 mm，波长为8 mm时，摩擦系数的最大增幅为169%，努塞尔数的最大增幅为28%，壁面最高温度降低0.03 K，最大温差减小7.9%。在等泵功耗条件下，平行结构双向弯曲波浪形微通道的综合热工性能优于缩放结构。研究结果揭示了不同通道结构双向弯曲波浪形微通道的性能，可为电池散热系统的优化设计提供参考。
Abstract: In the thermal management system of cylindrical lithium-ion batteries, serpentine cold plates are widely utilized due to their excellent heat dissipation performance. To further enhance heat transfer efficiency, a bidirectional curved wavy microchannel heat sink is proposed. The effects of channel configuration, amplitude, and wavelength on its thermal and flow characteristics were investigated through numerical simulations. Results indicate that bidirectional curved wavy microchannels with converging-diverging and parallel structures contribute to improved wall temperature uniformity. Specifically, the converging-diverging microchannel exhibits significant variations in cross-sectional area, leading to markedly increased local fluid velocity, elevated pressure drop, and enhanced secondary flow intensity. While heat transfer performance is improved, the frictional resistance also increases substantially. At a channel amplitude of 2 mm and wavelength of 8 mm, the maximum increase in friction factor reaches 169%, and the maximum increase in Nusselt number is 28%, accompanied by a reduction in the maximum wall temperature of 0.03 K and a decrease in the maximum temperature difference of 7.9%. Under equal pumping power conditions, the comprehensive thermal-hydraulic performance of the parallel bidirectional curved wavy microchannel surpasses that of the converging-diverging structure. The findings elucidate the performance characteristics of bidirectional curved wavy microchannels with different configurations, providing valuable insights for the optimized design of battery thermal management systems.
文章引用：邵光逸, 王波. 双向弯曲波浪形微通道的传热与流动特性[J]. 建模与仿真, 2025, 14(10): 131-142. https://doi.org/10.12677/mos.2025.1410612

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