Erscheint 4 Ausgaben pro Jahr
ISSN Druckformat: 1065-3090
ISSN Online: 1940-4336
Indexed in
EXPERIMENTAL STUDY OF IMPINGING HEAT TRANSFER OF INLINE AND STAGGERED JET ARRAYS BY TRANSIENT LIQUID CRYSTAL TECHNIQUE
ABSTRAKT
The objective of the present experimental work is the study of local heat transfer performance over a target plate under impingement of inline and staggered jet arrays by a liquid crystal thermograph technique. Three jet-to-target spacings Z (= z/d) of 3, 6, and 9 with inline and staggered jet arrays were considered at jet Reynolds numbers Re = 1500, 3000, and 4500 in three different exit-flow orientations. The results show that the local heat transfer rates are characterized by obvious periodic-type variation of Nusselt number distributions. The downstream peaks are diminished with increasing cross-flow effect. The best heat transfer performance is obtained with the cross flow exiting from both ends of the impingement channel. The inline jet array produces relatively higher local and overall heat transfer rates than those of the staggered jet array. Additionally, in the present results of 3 Ј Z Ј 9, higher heat transfer rates are found for the system with a smaller jet-to-plate spacing.
-
Yan W.M., Mei S.C., Measurement of detailed heat transfer along rib-roughened surface under arrays of impinging elliptic jets, International Journal of Heat and Mass Transfer, 49, 1-2, 2006. Crossref
-
Yan W.M., Mei S.C., Liu H.C., Soong C.Y., Yang W.-J., Measurement of detailed heat transfer on a surface under arrays of impinging elliptic jets by a transient liquid crystal technique, International Journal of Heat and Mass Transfer, 47, 24, 2004. Crossref
-
Yan W.M., Liu H.C., Soong C.Y., Yang W.-J., Experimental study of impinging heat transfer along rib-roughened walls by using transient liquid crystal technique, International Journal of Heat and Mass Transfer, 48, 12, 2005. Crossref
-
Caliskan S., Baskaya S., Experimental investigation of impinging jet array heat transfer from a surface with V-shaped and convergent-divergent ribs, International Journal of Thermal Sciences, 59, 2012. Crossref
-
Huang M., Yang Z., Wang B. X., Mei S. C., Yan W. M., Experimental study of impinging heat transfer along smooth or rib-roughened surfaces, 2011 IEEE 3rd International Conference on Communication Software and Networks, 2011. Crossref