Experimental Investigation of Heat Transfer of Plane Heat-Removing Surfaces with Plate Finning

Heat transfer of promising heat-removing surfaces with plate-slit finning intended for use in the case of air cooling of heat loaded radio- and microelectronic facilities in forced convection regime has been investigated experimentally. The influence of the depth of slitting fins and of the turning angle of their slit parts relative to the cooling flow direction on the intensity of heat transfer of the finned surface is shown. It has been established that the greatest intensifying effect is observed at the relative depth of the slitting of fins equal to 0.6, which leads to an increase in the intensity of heat release by 20–25%. The turning of the slit parts of the fins leads to heat transfer growth by 50–60% compared with traditional plate-finned surfaces. Improved dimensionless equations are suggested for calculating average heat transfer of surfaces with plate-slit finning under the conditions of forced convection in the range of the Reynolds number values from 2000 to 10,000. The results of investigation can be used in designing new systems of cooling radio- and microelectronic facilities.