Notice of RetractionRotation effect on jet impingement heat transfer in a narrow cavity with film extraction flow

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

An experimental investigation was carried out to examine rotation effect on jet impingement heat transfer in a narrow cavity with film extraction flow. A single confined cavity with a fixed jet-to-wall spacing of H/d=6.0 was studied for the rotational speed of 0 and 800rpm. The Reynolds number based on the inlet velocity of the jet air and the diameter of jet hole was varied from 2000 to 8000. The local and averaged heat transfer coefficients on the target surface were measured by a transient method with thermochromic liquid crystal. Experimental result reveals that the jet flow could be bent over by the Coriolis force and consequently the heat transfer would be weakened by rotation. Compared to the stationary results, the stagnation point has an offset of 1.5d at Re=2000, furthermore, the peak value of local heat transfer coefficient and averaged heat transfer coefficient are reduced 38.3% and 44.5%, respectively. But with the increasing of jet Re number, the rotation effect would be inconspicuous.