管翅换热器换热与流动的三维定常特性分析Flowing and heat transfer characteristics for three-dimensional steady flows of plate-fin tube heat exchangers with one row tube
姬长发;傅明星;王美;邱泓;
摘要(Abstract)：
为了深入了解单排管翅式换热器换热和流动特性,在雷诺数为100~600之间,翅片间空气为定常层流条件下,利用复合坐标网格系统及对流、导热相结合的数值分析方法,对5种不同几何参数平板翅紧凑管翅式换热器的流场、温度场、换热系数、传热量、压降、翅片效率进行了模拟计算和分析。结果表明:翅片越薄,单位体积、单位质量的传热量越大;在一定雷诺数条件下,存在一个最佳的翅片间距,并使得换热量最大;对所讨论的5种情况来说,当雷诺数为400时,翅片宽度较小的?热器的总传热量比其他4类高10%左右,但压力损失的降低变化不大。无论在哪种条件下,翅片后半部的传热量占全部传热量的25%以下,并且当雷诺数较低时,该比例会更低。
关键词(KeyWords)： 紧凑式换热器;节能;强化换热;数值模拟
基金项目(Foundation): 陕西省自然科学基金项目(2006E130)
作者(Author): 姬长发;傅明星;王美;邱泓;
Email:
DOI: 10.13800/j.cnki.xakjdxxb.2007.02.004
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