The Proceedings of the International Conference on Jets, Wakes and Separated Flows (ICJWSF)
Online ISSN : 2424-2888
2005
Conference information
THE EFFECT OF STREAMWISE INJECTION ON THE FLOW STRUCTURE AND SKIN FRICTION DISTRIBUTION OF A ROW OF MULTIPLE JETS-IN-CROSSFLOW : Invited Paper(Multiple Jet)
Sean D. PetersonMichael W. Plesniak
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CONFERENCE PROCEEDINGS FREE ACCESS

Pages 261-266

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Abstract
The velocity field and skin friction distribution around a row of five jets issuing into a cross flow via short (L/D≈1) holes inclined by 35° in the streamwise direction are presented. The flow features are compared with previously published data for jets issuing through holes oriented normal to the cross flow. Streamwise injection eliminated the recirculation region and consequent downstream spiral separation node vortices observed in the 90° case. The jetting processes caused by in-hole separations were also found to differ, with the bulk of the jet issuing from the leading half of the streamwise injected hole. The skin friction distribution around the injection holes was very similar to that of the normal holes, particularly in the wake of the hole, despite a much lower trajectory and increased spreading. This may have implications on the understanding of the degree to which the counter-rotating vortex pair impacts the wall shear stress.
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© 2005 The Japan Society of Mechanical Engineers
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