This paper addresses the experimental study of hot jets impingement on a concave wall. Both low and high Mach number conditions have been investigated. The results highlight the influence of the settling conditions: at low Mach number the heat transfer is maximum for a nozzle to wall distance corresponding to the end of the potential core whereas at high Mach number the heat transfer increases with this parameter. Infrared thermography is used to measure the wall temperature evolution during the heating. This temperature mapping provides the boundary condition necessary to solve the transient heat equation in the wall. From this, heat transfer and Nusselt number are derived and their behaviour compared to literature on the subject when possible. Finally, a correlation of Nusseit versus Reynolds, Prandtl and the nozzle to wall distance is proposed.
Infrared measurements of heat transfer in jet impingement on concave wall applied to anti-icing
2003
6 Seiten, 6 Bilder, 11 Quellen
Conference paper
English
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