涂存祯,陆钟超,张建友,张高鹏,胡亚男,丁玉庭,吕飞.MRF模型分析流态冰蒸发器刮板类型的换热性能[J].包装工程,2022,43(23):268-276.
TU Cun-zhen,LU Zhong-chao,ZHANG Jian-you,ZHANG Gao-peng,HU Ya-nan,DING Yu-ting,LYU Fei.Analysis on Heat Transfer Performance of Scraper Type of Ice Slurry Evaporator by MRF Model[J].Packaging Engineering,2022,43(23):268-276. |
| MRF模型分析流态冰蒸发器刮板类型的换热性能 |
| Analysis on Heat Transfer Performance of Scraper Type of Ice Slurry Evaporator by MRF Model |
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| DOI：10.19554/j.cnki.1001-3563.2022.23.032 |
| 中文关键词: 流态冰蒸发器 刮板类型 换热 Fluent 多重参考系模型 |
| 英文关键词: ice slurry evaporator scraper type heat transfer Fluent multi-reference frame model |
| 基金项目:“十三五”国家重点研发计划重点专项 (2019YFD0901602) |
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| 中文摘要: |
| 目的 为提高刮削式流态冰机制冰效能，研究刮板结构对刮削式流态冰蒸发器换热性能的影响。方法 利用Fluent内MRF模型对SolidWorks软件建立的不同刮板类型(近椭圆形孔刮板、近菱形孔刮板、无孔刮板)的流态冰蒸发器模型进行换热性能的模拟分析。结果 通过对不同转速下各类型刮板换热性能及蒸发器近壁面、刮板表面、旋转流体域横截面的温度分布云图进行分析发现:相同转速下，无孔刮板的换热性能高于近菱形孔刮板和近椭圆形孔刮板，但无孔刮板的近壁面温度分布不均匀，呈现两级分化趋势，极易造成冰堵。有孔刮板蒸发器近壁面温度分布较均匀，且受转速影响较大，随着转速的增加其换热性能增强，转速大于200 r/min之后换热性能提升不显著。同时，双组刮板有利于提升蒸发器的换热性能。结论 近菱形孔刮板在200 r/min转速下，换热效果好且蒸发器内温度分布较均匀，有利于流态冰高效、稳定地制取。 |
| 英文摘要: |
| The work aims to improve the ice-making efficiency of scraping ice slurry machine and study the effect of scraper structure on the heat transfer performance of scraping ice slurry evaporator. The MRF model in Fluent was used to simulate and analyze the heat transfer performance of ice slurry evaporator models with different types of scrapers (near-oval hole scraper, near-rhombus hole scraper and non-hole scraper) established by SolidWorks software. Through the analysis on the heat transfer performance of various types of scrapers at different speed and the temperature distribution of the evaporator near the wall, the scraper surface and the cross section of the rotating fluid domain, it was found that the heat transfer performance of the non-hole scraper was higher than that of the near-rhombus hole scraper and the near-oval hole scraper at the same speed. However, the temperature distribution near the wall of the non-hole scraper was uneven, showing a two-stage differentiation trend, which was very easy to cause ice blockage. The temperature distribution near the wall surface of the evaporator with perforated scraper was relatively uniform, and it was greatly affected by the rotating speed. With the increase of rotating speed, the heat transfer performance was enhanced. However, the heat transfer performance was not significantly improved after the rotating speed was greater than 200 r/min. At the same time, double groups of scrapers were beneficial to improving the heat exchange performance of evaporator. Therefore, under the rotating speed of 200 r/min, the near-rhombus hole scraper has good heat exchange effect and the temperature distribution in the evaporator is more uniform, which is beneficial to the efficient and stable production of ice slurry. |
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