Heat Transfer in Dispersed Two-Phase Swirl Flow

换热强化技术和装置可用于在广泛的应用中优化换热效率。该研究计划的目标是在不显著改变发生对流沸腾的装置中所需的泵浦功率的情况下，提高传热速率。该研究将为制冷和发电领域的换热器设计提供参考。这项工作中所涉及的特定研究主题涉及通过扭曲的胶带来增强液滴流动。与单相流和其他两相流流型相比，该流型具有较差的换热特性。因此，强化换热可以对这种流动状态做出重要贡献。本研究将利用现有的实验装置，对分散旋流中的换热进行实验研究。对于这种液滴流动状态，将建立一个唯象关联和综合模型。

Heat transfer augmentation techniques and devices can be used to optimize the heat transfer efficiency in a wide range of applications. The objective of this research program is to increase the heat transfer rate without significantly altering the required pumping power in devices where convective boiling occurs. This research will benefit heat exchanger designs in the refrigeration and power generation areas. The particular research topic addressed in this work deals with droplet flow augmentation by twisted tapes. This flow regime has poor heat transfer characteristics compared to single-phase flows as well as other two-phase flow regimes. Therefore, heat transfer enhancement can make important contributions to this flow regime. This investigation will experimentally determine the heat transfer in dispersed swirl flow with an existing facility. A phenomenological correlation and comprehensive model will be developed for this droplet flow regime.