高强化活塞内冷油腔振荡传热特性的场协同分析
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国家自然科学基金(51706058); 河北省高等学校科学技术研究项目(ZD2019101)


Field synergy analysis of the heat transfer characteristics of cooling oil gallery in highly-intensified piston
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    摘要:

    为研究高强化活塞内冷油腔振荡强化传热机理,应用场协同理论对活塞内冷油腔中机油的振荡流动与传热过程进行分析。采用CFD软件Fluent模拟椭圆形油腔和水滴形油腔内机油的速度场、温度场的分布,得到2种结构油腔的平均场协同数和协同角余弦值在不同工况下的变化规律。结果表明,场协同理论能够很好地解释活塞内冷油腔的振荡强化传热性能,水滴形油腔内、外壁面处的协同角要小于椭圆形油腔,平均场协同数和协同角余弦值都大于椭圆形油腔,说明水滴形油腔的协同程度更好,其强化传热效果也更佳。采用场协同理论可以满足活塞内冷油腔的结构优化设计,为提高活塞内冷油腔的强化传热能力提供了理论参考。

    Abstract:

    In order to study the oscillating heat transfer enhancement mechanism of the cooling oil gallery of highly-enhanced piston,the oscillatory flow and heat transfer process of engine-oil in the cooling oil gallery of piston were analyzed by the field synergy theory.CFD software FLUENT was used to simulate the velocity field and temperature field distribution of the fluid in the elliptic and the variations of mean field synergy number and cosine value of synergy angle in both two gallery structures under different conditions were obtained.The results reveal that the field synergy principle could well explain the oscillating heat transfer enhancement performance of cooling oil gallery in highly-intensified piston efficiently.The synergy angles at the inner and outer walls of the water droplet oil gallery are smaller than that of elliptic oil gallery,and the mean field synergy number and cosine value of synergy angles of water droplet oil gallery are larger than that of elliptic oil gallery,which indicates that the synergy degree of water droplet oil gallery and its effect of heat transfer enhancement are much better.Using the field synergy theory to guide the structure design of cooling oil gallery of piston will open up a new way to improve the heat transfer enhancement ability of cooling oil chamber gallery.

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朱海荣,彭培英,陈晓萌,吴亚辉,王建华.高强化活塞内冷油腔振荡传热特性的场协同分析[J].河北科技大学学报,2022,43(2):119-126

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  • 收稿日期:2021-09-28
  • 最后修改日期:2022-01-27
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  • 在线发布日期: 2022-05-03
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