风力发电机液冷冷却器的性能分析及优化
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TK83

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江苏省自然科学基金(BK20180960)


Analysis and Optimization of liquid cooler for wind generator
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    摘要:

    为了研究大功率风力发电机液冷冷却器中翅片结构形式对冷却器整体性能的影响,本文采用数值计算的手段,建立了平直、打孔、凸台三类翅片的数学模型,分析了不同雷诺数Re下翅片结构尺寸对换热系数h及阻力损失△P的影响,并利用综合性能评价因子h/△P1/3对其评价,研究表明:随着长宽比a/b的增加,打孔翅片h呈先上升后下降趋势,△P则呈逐渐上升趋势,而凸台翅片h呈先下降再上升的趋势,△P变化与打孔翅片类似;通过综合性能评价因子h/△P1/3评价比较可得,打孔翅片相对平直翅片整体提升12.7%,凸台翅片相对平直翅片降低50%。

    Abstract:

    In order to study the fin structure on the overall performance of liquid cooling cooler for high power wind generator, CFD was used to build the mathematical model of fat fin, hole fin and boss fin. Under different Reynolds number Re, the influence of fin structure size on heat transfer coefficient h and pressure drop △P was analyzed, and the comprehensive performance evaluation factor h/△P1/3 is used to evaluate the cooler. The research showed that: with the increase of length to width ratio a/b, the h of hole fin, and the change of △P showed a gradual upward trend; but the h of boss fin decreased first and then raised, and the△P was similar to the hole fin. Also, through the comparison of h/△P1/3, it could be concluded that the overall improvement of hole fin is 12.7% compared with flat fins, and the reduction of boss fin is 50% compared with flat fins.

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周年勇,段锋,王庆荣,等. 风力发电机液冷冷却器的性能分析及优化[J]. 科学技术与工程, 2020, 20(21): 8517-8522.
zhou nian yong, duan feng, wang qing rong, et al. Analysis and Optimization of liquid cooler for wind generator[J]. Science Technology and Engineering,2020,20(21):8517-8522.

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  • 收稿日期:2020-01-13
  • 最后修改日期:2020-05-29
  • 录用日期:2020-03-10
  • 在线发布日期: 2020-08-18
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