TY - GEN
T1 - Experimental study on heat tranfer characteristics of an impinging axisymmetric butane/air flame jet
AU - Dong, L. L.
AU - Cheung, C. S.
AU - Leung, C. W.
PY - 2001
Y1 - 2001
N2 - A set of experiments were conducted to determine the heat transfer characteristics of a round, premixed butane/air flame jet impinging on a cold flat plate, normally and tiltedly. The effects of the jet exit Reynolds number, the nozzle-to-plate distance, and the incidence between the plate and the axis of the flame jet, on the thermal performance of the jet, were examined. The range of Reynolds numbers was selected to cover the fully laminar to the transitional flow conditions. The dimensionless nozzle-to-plate distance varied from 1 to 8, covering small and moderate distances. The inclination angles chosen were 57°, 67°, 80° and 90°, respectively. All the tests were carried out at the stoichiometric condition. Under normal impingement, a cool central core with low heat fluxes was found for all the tests. The highest Nusselt number was obtained at nozzle-to-plate distance of 6d. When the impingement plate was tilted, it was found that the location of the maximum heat flux point shifted away from the geometrical impingement point by reducing the angle of incidence. Decreasing the incidence angle also increased the maximum heat flux, while reducing the average heat transfer. The present work studied the butane/air flame jets, which was different from the previous studies concentrated on methane or natural gas flames.
AB - A set of experiments were conducted to determine the heat transfer characteristics of a round, premixed butane/air flame jet impinging on a cold flat plate, normally and tiltedly. The effects of the jet exit Reynolds number, the nozzle-to-plate distance, and the incidence between the plate and the axis of the flame jet, on the thermal performance of the jet, were examined. The range of Reynolds numbers was selected to cover the fully laminar to the transitional flow conditions. The dimensionless nozzle-to-plate distance varied from 1 to 8, covering small and moderate distances. The inclination angles chosen were 57°, 67°, 80° and 90°, respectively. All the tests were carried out at the stoichiometric condition. Under normal impingement, a cool central core with low heat fluxes was found for all the tests. The highest Nusselt number was obtained at nozzle-to-plate distance of 6d. When the impingement plate was tilted, it was found that the location of the maximum heat flux point shifted away from the geometrical impingement point by reducing the angle of incidence. Decreasing the incidence angle also increased the maximum heat flux, while reducing the average heat transfer. The present work studied the butane/air flame jets, which was different from the previous studies concentrated on methane or natural gas flames.
KW - Angle of incidence
KW - Butane/air combustion
KW - Flame impingement heat transfer
UR - https://www.scopus.com/pages/publications/0346905412
M3 - Conference contribution
AN - SCOPUS:0346905412
SN - 0791835332
SN - 9780791835333
T3 - Proceedings of the National Heat Transfer Conference
SP - 1577
EP - 1584
BT - Proceedings of the 2001 National Heat Transfer Conference Volume 2
T2 - 2001 National Heat Transfer Conference (NHTC2001)
Y2 - 10 June 2001 through 12 June 2001
ER -