Couette 流れと干渉する衝突噴流の熱伝達に関する研究

（Hagen-Poiseuille 流れとの比較）

抄録

An impinging jet has good heat and mass transfer characteristics, and thus is widely used in industries for thermal management of heating devices and jet washing. To improve these characteristics, numerous numerical and experimental studies have been conducted on interfering flows between a main stream or a Hagen–Poiseuille flow and an impinging jet. These interfering flows occur at locations where flows merge in a T-shaped pipe and during film cooling on turbine blades. However, very few studies focus on the heat transfer field between an impinging jet and a Couette flow despite its occurrence in important processes, such as cooling of rotary bearings, cooling of rolled steel in the production process, and carrier gas flow in additive manufacturing. Thus, we studied the heat transfer of an impinging jet interfering with a Couette flow through numerical simulations. To obtain unsteady flow and temperature fields, we used direct numerical simulations which include Boussinesq approximation for the buoyancy effect term. Using this numerical simulation, we compared an impinging jet interfering with a Couette flow and that with a Hagen–Poiseuille flow.