垂直な平板に沿う乱流自然対流の伝熱促進に関する実験的研究 : 第1報,吹出し・吸込みの効果

抄録

To attain a high enhancement rate in convective heat transfer, deformation or destruction of the boundary layer is a necessary condition. For example, injection or suction is one of the most fundamental methods. Although several attempts of heat transfer enhancement have been made in forced convection, in turbulent natural convection, we have not discussed an effective technique sufficiently. Especially, when only natural convection is applicable to cooling, it is important to analyze its enhancement mechanism. In this paper (the 1st report), therefore, injection and suction were added to turbulent natural convection along a vertical flat plate, and the possibility of heat transfer enhancement was discussed at first. It was realized that local Nusselt numbers affected by injection and suction were 1.5∼1.6 times as much as those for pure turbulent natural convection.