伝熱面との間に間げきのある乱れ促進体による強制対流熱伝達の促進に関する研究
1987 年 53 巻 487 号 p. 980-983
詳細
1987 年 53 巻 487 号 p. 980-983
This study is a part of a research program whose objective is to determine an optimum way of enhancing forced convection heat transfer using turbulence promoters. Effectiveness of turbulence promoters with clearance between the heat transfer surface is tested. Flow friction and heat transfer coefficients are measured at Reynolds numbers ranged from 1.5×104 to 9×104. Inclination of the rib plate used as a promoter is also varied in addition to the variation of clearance. The result of performance evaluation suggests that a turbulence promoter with clearance and inclination shows a slight improvement of performance in the case where the clearance is small. A possible reason that such a type of turbulence promoter does not show much improvement in its performance characateristics may be the considerable reduction of the local heat transfer rate around the region where the separated flow reattaches.
