SURFACE SHAPE OF FLOW PASSAGE FOR HEAT TRANSFER ENHANCEMENT AND REDUCTION OF PRESSURE LOSS

摘要

PURPOSE: A surface shape of a flow path for heat transfer enhancement and reduction of pressure loss is provided to improve the heat transfer performance by forming riblet on a dimple according to the flow direction of the fluid. CONSTITUTION: A surface shape of a flow path for heat transfer enhancement and reduction of pressure loss comprises a dimple(2) and a riblet(3). The dimple is formed on the surface(1) of a flow path of the fluid in concave arc. The riblet is formed on the dimple according to the flow direction of the fluid. The riblet has the cross-sectional shape of the spire form. The riblet is selectively formed on the downstream side, the upstream or the central part of the dimple.