• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Investigation on start-up and thermal performance of the single-loop pulsating heat pipe with variable diameter
【24h】

Investigation on start-up and thermal performance of the single-loop pulsating heat pipe with variable diameter

机译：具有可变直径的单环脉动热管的启动和热性能的研究

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 start-up performance and heat transfer performance of three-dimensional single-loop pulsating heat pipes (PHP) with three diameter ratios are numerically probed in present work. The various heating power (20W-50W) and inclination angle (0°-90°) are employed in present numerical simulation. The results show that the start-up and heat transfer performance of the uniform PHP are significantly affected by inclination angle. When PHP is placed vertically, two start-up processes are observed for the PHP with three diameter ratios and the heating power of 20W. The start-up of PHP with variable diameter has a sharp decline in temperature, while the temperature variation of uniform PHP in start-up is continuous and stable. By comparing three PHPs with different diameters, it can be found that the variable diameter structure can increase additional pressure difference to reduce the sensitivity of PHP to gravity, and even the start-up phenomenon can be observed with horizontal arrangement. In addition, under the condition of the heating power of 20W, the PHP with diameter ratio of 4:2 has the greatest thermal resistance, while the PHP with diameter ratio of 4:3 has the least thermal resistance, among which the thermal resistance of PHP with diameter ratio of 4:3 reduces by 3.37% under the inclination angle of 10°. Besides, the larger the diameter ratio is, the easier the PHP is to dry-out due to less liquid mass and greater flow resistance with the same filling ratio.
机译：三维单环脉动热管（PHP）的启动性能和传热性能具有三维直径比在现有工作中进行了数控探测。在本数值模拟中采用各种加热功率（20W-50W）和倾斜角（0°-90°）。结果表明，均匀PHP的启动和传热性能受到倾斜角度的显着影响。当PHP垂直放置时，针对具有三个直径比的PHP和20W的加热功率观察到两个启动过程。 PHP具有可变直径的PHP的启动在温度下急剧下降，而启动中均匀PHP的温度变化是连续且稳定的。通过比较具有不同直径的三个PHP，可以发现可变直径结构可以增加额外的压力差，以降低PHP对重力的敏感性，并且甚至可以用水平布置观察到启动现象。另外，在20W的加热功率的条件下，具有直径为4：2的PHP具有最大的热阻，而具有直径为4：3的PHP具有最小的耐热性，其中耐热性直径为4：3的PHP在10°的倾斜角下减少3.37％。此外，直径比的越大，由于较少的液体质量和具有相同填充率的更大的流动性，PHP更容易干燥。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第12期|121811.1-121811.10|共10页
  • 作者

    Jiansheng Wang; Yu Pan; Xueling Liu;

  • 作者单位

    Key Laboratory of Efficient Utilization of Low and Medium Grade Energy MOE School of Mechanical Engineering Tianjin University Tianjin 300350 P. R. China;

    Key Laboratory of Efficient Utilization of Low and Medium Grade Energy MOE School of Mechanical Engineering Tianjin University Tianjin 300350 P. R. China;

    Key Laboratory of Efficient Utilization of Low and Medium Grade Energy MOE School of Mechanical Engineering Tianjin University Tianjin 300350 P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    PHP; Diameter ratio; Inclination angle; Start-up process; Thermal resistance;

    机译：PHP;直径比;倾斜角度;启动过程;热阻;

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