Numerical simulation of spray cooling for extruded plastic pipe

LI Jing; ZENG Cheng; LIU Yeming; ZHANG Ding

doi:10.3969/j.issn.0438-1157.2014.06.015

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Numerical simulation of spray cooling for extruded plastic pipe

更新时间：2025-12-10

- Numerical simulation of spray cooling for extruded plastic pipe
- CIESC Journal Issue 6, Pages: 2056-2062(2014)
- 作者机构：
  
  1. 华南理工大学化学与化工学院,广东,广州,510640
  2. 广东省光电工程技术研究中心,广东,中山,528400
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.06.015
  CLC： K124
- Online First：05 June 2014，
  
  Published：05 June 2014
- 稿件说明：
移动端阅览
LI Jing, ZENG Cheng, LIU Yeming, et al. Numerical simulation of spray cooling for extruded plastic pipe[J]. CIESC Journal, 2014, (6): 2056-2062.
DOI：

LI Jing, ZENG Cheng, LIU Yeming, et al. Numerical simulation of spray cooling for extruded plastic pipe[J]. CIESC Journal, 2014, (6): 2056-2062. DOI： 10.3969/j.issn.0438-1157.2014.06.015.

摘要

冷却系统是塑料挤出管道生产工艺中的关键设备，其冷却的均匀性和效率直接影响管道产品的质量及生产速度。首先基于ANSYS对喷淋冷却瞬态传热进行模拟，结果表明：对流传热系数小于180 W·m-2·K-1时，冷却至目标温度（47℃）所需的时间随传热系数的变化明显；传热系数大于180 W·m-2·K-1时，冷却至目标温度所需的时间随传热系数的变化不大。然后基于FLUENT软件对喷淋喷嘴进行模拟，研究了喷淋入口速度、喷嘴高度对喷淋传热系数的影响，结果表明：随着喷淋入口速度的增加（6～15 m·s-1的范围内），总体对流传热系数增大，驻点处的传热系数由217 W·m-2·K-1增加到386 W·m-2·K-1；随喷淋高度的减小（68～128 mm范围内），壁面传热系数呈增加趋势，驻点处传热系数由227 W·m-2·K-1增加到311 W·m-2·K-1。基于以上研究，为真空定径喷淋冷却水槽的整体优化提出合理建议。

Abstract

Cooling system is essential in the production process of extruded plastic pipe

which determines the length of production line and product quality. This study simulates the transient heat transfer of spray cooling based on ANSYS. The result shows that for the convective heat transfer coefficient less than 180 W·m-2·K-1

the time for cooling to 47℃ changes obviously with the convective heat transfer coefficient

while it does not change much for higher convective heat transfer coefficient. Then we simulate the spray nozzle based on FLUENT software

investigating the effect of entrance velocity and nozzle height on distribution of convective heat transfer coefficient. We have found that with other parameters constant

the total convective heat transfer coefficient increases with entrance velocity (within 6-15 m·s-1)

and the heat transfer coefficient of stagnation point increases from 217 W·m-2·K-1 to 386 W·m-2·K-1. Wall convective heat transfer coefficient increases as the nozzle height decreases (within 68-128 mm)

and heat transfer coefficient of stagnation point increases from 227 W·m-2·K-1 to 311 W·m-2·K-1. Finally we put forward a proposal on global optimization for spray cooling baths based on above study.

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