Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
Investigation of the flow structure and convective heat transfer in impinging swirling turbulent jets. / Sharaborin, D. K.; Dulin, V. M.; Nichik, M. Yu и др.
19th International Conference on the Methods of Aerophysical Research, ICMAR 2018. ред. / Fomin. Том 2027 American Institute of Physics Inc., 2018. 040063 (AIP Conference Proceedings; Том 2027).Результаты исследований: Публикации в книгах, отчётах, сборниках, трудах конференций › статья в сборнике материалов конференции › научная › Рецензирование
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TY - GEN
T1 - Investigation of the flow structure and convective heat transfer in impinging swirling turbulent jets
AU - Sharaborin, D. K.
AU - Dulin, V. M.
AU - Nichik, M. Yu
AU - Markovich, D. M.
N1 - Publisher Copyright: © 2018 Author(s).
PY - 2018/11/2
Y1 - 2018/11/2
N2 - The present paper reports on the measurements of flow structure and heat transfer in swirling jets, impinging normally on a flat heated wall. Velocity field is measured by using the stereoscopic particle image velocimetry technique, whereas the wall temperature is monitored by IR imaging. Two cases of distances between the jet nozzle and impingement surface are considered, namely, one and two nozzle diameters. The Reynolds number is fixed as Re = 5000. Flows of non-swirling, weakly and strongly swirling jets are investigated. Only for the latter case in free jet flow configuration, the swirl intensity exceeds a critical value for breakdown of the swirling jet's vortex core, corresponding to the formation of a central recirculation zone. For the confined jet conditions, the superimposed swirl in both cases results in presence of an extended recirculation zone between the nozzle and impingement wall, which is found to reduce heat transfer around the stagnation point for the separation distance of two nozzle diameters. However, for the separation distance of one nozzle diameter, the high-swirl jet is found to provide most effective overall cooling of the wall.
AB - The present paper reports on the measurements of flow structure and heat transfer in swirling jets, impinging normally on a flat heated wall. Velocity field is measured by using the stereoscopic particle image velocimetry technique, whereas the wall temperature is monitored by IR imaging. Two cases of distances between the jet nozzle and impingement surface are considered, namely, one and two nozzle diameters. The Reynolds number is fixed as Re = 5000. Flows of non-swirling, weakly and strongly swirling jets are investigated. Only for the latter case in free jet flow configuration, the swirl intensity exceeds a critical value for breakdown of the swirling jet's vortex core, corresponding to the formation of a central recirculation zone. For the confined jet conditions, the superimposed swirl in both cases results in presence of an extended recirculation zone between the nozzle and impingement wall, which is found to reduce heat transfer around the stagnation point for the separation distance of two nozzle diameters. However, for the separation distance of one nozzle diameter, the high-swirl jet is found to provide most effective overall cooling of the wall.
UR - http://www.scopus.com/inward/record.url?scp=85056358618&partnerID=8YFLogxK
U2 - 10.1063/1.5065337
DO - 10.1063/1.5065337
M3 - Conference contribution
AN - SCOPUS:85056358618
VL - 2027
T3 - AIP Conference Proceedings
BT - 19th International Conference on the Methods of Aerophysical Research, ICMAR 2018
A2 - Fomin, null
PB - American Institute of Physics Inc.
T2 - 19th International Conference on the Methods of Aerophysical Research, ICMAR 2018
Y2 - 13 August 2018 through 19 August 2018
ER -
ID: 17392198