Heat Transfer Characteristics of Rotating Cylinder with Water Impinging Jet

Abstract

Heat transfer in spray cooling has been studied extensively in various industrial operations such as metal
quenching, hot rolling and atomization etc. The landing of liquid on metal efficiently is important part of study. Spray
technology cools the hot metal by improving ability of liquid to be absorbed. Nozzles are used to distribute liquid
droplets onto heated surfaces. Spray cooling occurs when liquid forced through a small orifice into dispersion of fine
droplets which impact on heated surface. The droplets spread on the surface and absorb the heat there by cooling the
surface.
Most machinery reaches power conversion in the form of rotation, such as mechanical processing machine, textile
machine, gas turbine, and power electronic equipment, with a wide application range. The operating temperature of
rotating machinery is constantly increased due to the generation of friction heat, combustion or power output. Thus,
effective cooling technology should be used for heat dissipation, in order to protect normal operation of the machine
parts. The heat transfer in spray cooling is studied experimentally and validated with the CFD analysis of spray cooling.