...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >A study of frost build-up on hydrophilic and hydrophobic surfaces under forced convection conditions
【24h】

A study of frost build-up on hydrophilic and hydrophobic surfaces under forced convection conditions

机译：强制对流条件下亲水性和疏水表面的霜冻累积研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The present study is aimed at investigating, by means of an experimental approach, the effect of surface wett-ability on the frost accretion over horizontal flat surfaces under forced convection conditions. A purpose-built closed-loop wind-tunnel facility was especially designed and constructed to provide a strict control of the psychrometric conditions at the entrance of the test section, and also of the plate surface temperature. An image acquisition system was used to measure the thickness of the frost layer over time. A dataset comprised of 800 experimental data points spanning different surface temperatures (from -20 to -10 degrees C), air temperatures (from 5 to 16 degrees C), modified Jakob numbers (from 1.05 to 2.10), and static contact angles (from 60 degrees to 123 degrees) was gathered and used to investigate both the individual and simultaneous effects of key heat and mass transfer parameters on the frost growth rate. A first-principles modelling approach was used together with the experimental data obtained in-house to come up with a semi-empirical fully-algebraic expression for the frost thickness as a function of the time, the supercooling degree, and the surface contact angle. It was found that the proposed correlation was able to predict most of the experimental data points ( 90%) for the frost thickness within +/- 15% error bounds. Insights on early and delayed nucleation were also obtained from the analysis of the experimental data.
机译：本研究旨在通过实验方法调查表面Wett-engity对强制对流条件下水平平坦表面的霜冻吸收的影响。专门设计的闭环风隧道设施特别设计和构造，以便在测试部分入口处的心理测量条件下进行严格控制，以及板表面温度。图像采集系统用于测量霜层随时间的厚度。一个数据集由＆gt组成; 800实验数据点跨越不同的表面温度（从-20到-10℃），空气温度（从5到16摄氏度），改进的Jakob号（从1.05到2.10），静态接触角（从60度到123聚集在一起并用于研究关键热量和传质参数对霜冻生长速率的个体和同时效果。与在房屋内部获得的实验数据一起使用第一原理建模方法，以提出作为时间，过冷度和表面接触角的末端的半经验完全代数表达。发现提出的相关性能够预测+/- 15％误差范围内的霜厚度的大部分实验数据点（＆ 90％）。早期和延迟成核的见解也从实验数据的分析中获得。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号