Jet impingement cooling in rotating two-pass rectangular channels with smooth walls
1997 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. The objective of this investigation is to study the effects of rotation on jet impingement heat transfer in two-pass rectangular channels, orthogonally rotating with smooth target walls. The jets impinge in the opposite direction during forward rotation in the first channel and in the same direction during forward rotation in the second channel. The jets impinge orthogonally on the heated target walls and introduce crossflow at large radial locations and travel radially outward in the first channel and travel radially inward in the second channel. During experiments jet Reynold numbers was varied from 4000-10000 and rotation speed was varied from 0- 800 rpm. Jet rotation number was varied from 0.0-0.0133. Results show that the heat transfer distribution in both the channel is 22% lower (RCj = 4000) and 12% lower (Rej= 10000) than the corresponding non-rotating values. This is due to rotation induced Coriolis and centrifugal forces.