Author : Bramhadev Bachute and D. S. Watvisave

Enhancement of heat transfer using the jets impingement on a surface and related fluid flow phenomenon developed due to turbulence is still an active area of research. In present study effect of different nozzle shapes on heat transfer with a plane surface is experimentally investigated. In this the Reynolds number is range in from 5000 to 15000 based on jet exit velocity and nozzle hydraulic diameter and nozzle to plate spacing (H/D) from 2-10 nozzle hydraulic diameter. The size of nozzle exit area is selected based on nozzle hydraulic diameter 7mm. It is found that heat transfer with square nozzle jet is more than other nozzle configuration and maximum heat transfer rate with square jet at H/D=6 are obtained.

Keywords: Heat transfer, Force convection, Fluid flow, Jet impingement