Experimental Research on Impinging Slot Jet on a Concave Surface - Effects of Impinging Height and Reynolds Number
Main Article Content
Abstract
Experimental research of single slot impinging jet upon a concave surface were conducted by classical Particle Image Velocimetry (PIV) and infrared thermography. Main parameters of this research were nozzle exit Reynolds number $(Re_{b}=1400-6400)$, dimensionless impinging height $(H/b=3-7)$, relative curvature of wall $(D_{c}/b=5)$ and little dissymmetric outlet flow $(e/b=0.8)$. Results indicated that impinging jet oscillated at three semi-stable different point at high impinging height while it stabilized at a position at small impinging height. Therefore, oscillation of impinging jet generated a uniform heat transfer at high impinging height while stabilized impinging jet caused an asymmetric heat transfer at low impinging height.
Keywords
Impinging jet, concave surface, PIV, infrared thermography
Article Details
References
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[3] Y.K. Suh, J.H. Park, E.C. Jeon, J.W. Kim, A numerical study on the oscillatory impinging jet, SAE 2004 Word Congress & Exhibition, 2004.
[4] G. Yang et al.. An experimental study of slot jet impingement cooling on concave surface: effects of nozzle configuration and curvature, International Journal of Heat and Mass Transfer, 42 (1999) 2199-2209.
[5] T.K.D. Hoang, L.E. Brizzi, E. Dorignac, influence des conditions d'entrée/sortie pour un jet plan impactant une surface concave en milieu confiné, $18^{th}$ Congrès Français de Mécanique, Grenoble, French, 2007.
[6] T.K.D. Hoang, M. Fenot, L.E. Brizzi, E. Dorignac, Etude des transferts thermiques d'une paroi concave soumise à l'impact d'un jet plan en milieu confiné pour différentes conditions de sortie du jet, Société Français de Thermique, Toulouse, French, 2008.
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