A STUDY OF HEAT TRANSFER ASSOCIATED WITH THE COOLING OF A HORIZONTAL ROTATING CYLINDER USING AIR JET FLOW
The method of cooling a rotating cylinder with a large outside diameter creates engineering design problems as it cannot be put into a wind tunnel. Therefore, an experimental investigation and analysis of the heat transfer for cooling a horizontal rotating cylinder with air jet flow through a strip nozzle was proposed.
From the study we came to four conclusions.
these being that the influence of the rotating
Reynolds number (Rer) could be neglected if it were less than critical Reynolds number Rer,cri), that
the coefficient of heat transfer varies' only 5%
within region of the relative distance 1/D from
0.08 to 0.2, and that the Nusselt number (Nu) is
proportional to the 2/5 power of the relative width
of the nozzle (B/D) and the 2/3 power of the jet
flow Reynolds number (Rec). Finally, we obtained a
equation which can be recommended for calculating
the heat transfer from air jet flow to the rotating
cylinder, when Rer < Rer,cri and 0.06<1/D<0.35.