ディンプルが流れと熱伝達特性に及ぼす影響に関する研究

抄録

In recent years, with the influence of global warming, high-performance of Double Tube Heat Exchanger constituting car air conditioner is required. As a way to do that, a technique of laying dimples on the inner pipe wall surface of the heat exchanger attracts attention. In this study, numerical analysis was carried out by in-house code for the case where one dimple was laid on the bottom of the rectangular tube to clarify the characteristics of one dimple. As a result, from the viewpoint of the vortex structure in the dimple, teardrop shaped dimple had the best heat transfer characteristics compared to other shapes.