Trajectory and entrainment of a round jet in crossflow
作者:
Lester L. Yuan,
Robert L. Street,
期刊:
Physics of Fluids
(AIP Available online 1998)
卷期:
Volume 10,
issue 9
页码: 2323-2335
ISSN:1070-6631
年代: 1998
DOI:10.1063/1.869751
出版商: AIP
数据来源: AIP
摘要:
This paper examines the trajectory and entrainment characteristics of a round jet in crossflow. A series of large eddy simulations was performed at Reynolds numbers of 1050 and 2100 and at jet to crossflow velocity ratios of 2.0 and 3.3. Trajectories, which are defined based on the mean streamlines on the centerplane, all collapse to a single curve far from the jet exit, and this curve can be represented with a power law fit. Within this power law region, entrainment of crossflow fluid is shown to be the primary mechanism by which the jet trajectory is determined. Upstream of the power law region, near the jet exit, jet trajectory varies from changes in pressure drag and from differences in the turbulence intensities in the incoming pipe flow. ©1998 American Institute of Physics.
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