华婷婷,陈永东,徐双庆,李雪

• 1:浙江工业大学化工机械设计研究所
• 2:合肥通用机械研究院有限公司

摘要(Abstract)：

螺旋板式换热器的螺旋板间焊有定距柱,用于增强换热器的结构强度及增加流体扰动。为了研究定距柱排列密度对螺旋板式换热器传热特性的影响,建立螺旋板式换热器周期结构模型,利用计算流体动力学(CFD)软件对其传热过程进行数值模拟。结果表明:周期结构模型适用于螺旋板式换热器传热过程的模拟;弯曲可强化通道的对流换热过程;增大定距柱排列密度可提高换热器的传热性能。湍流状态下螺旋流的努塞尔数准则方程未充分考虑定距柱的影响,根据数值模拟得到的定距柱排列密度与努塞尔数的变化关系对准则方程进行修正。与原准则方程相比,修正后的方程将努塞尔数预测值与试验值的误差从-40%～-20%降低至-9%～20%。

关键词(KeyWords)： 螺旋板式换热器;定距柱;数值模拟;湍流;努塞尔数

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2017YFF0209800)

作者(Author): 华婷婷,陈永东,徐双庆,李雪

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