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CONCEPTS FOR UNSTEADY CONVECTIVE HEAT TRANSFER USING DEVICES WITHOUT MOVING PARTS

DOI: 10.1615/ICHMT.1996.TransientConvHeatTransf.40

Heinz Herwig
Institute of Thermodynamics, Hamburg University of Technology, Hamburg, D-21073, Germany

I. Friedrich
Technische Thermodynamik, TU Chemnitz-Zwickau, Chemnitz, Germany

Abstrakt

Three different concepts of unsteady heat and mass transfer based on unsteadily impinging jets are proposed. The physics of unsteady heat transfer is discussed with special emphasize on its heat transfer augmentation potential. A common feature of all three devices (precessing jet, flip-flop jet and Karman vortex jet) is the absence of moving parts and external energy sources. Experimental results are shown and discussed for the precessing jet arrangement.

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