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Title: On the use of notched collars on an axisymmetric jet
Authors: Zeng, Y. 
New, T.H.
Tsai, H.M. 
Keywords: Collared-jets
Hot-wire measurements
Notched collars
Issue Date: Sep-2009
Citation: Zeng, Y., New, T.H., Tsai, H.M. (2009-09). On the use of notched collars on an axisymmetric jet. Experimental Thermal and Fluid Science 33 (6) : 1029-1034. ScholarBank@NUS Repository.
Abstract: This paper reports an experimental study conducted on the use of circular, V- and A-notched collars with the expansion-ratio of 3 for a Re = 20,000 axisymmetric jet by using hot-wire anemometry. Results show that limited specific differences in the centerline velocity decay and turbulent intensity levels arise from the use of notched collars. The overall flow field of the collared-jets and their self-excitation mechanisms are also not significantly influenced by modifications to the axial distance distribution of the collars, at least for the notch configurations used in the present study. Observations gathered in the present study suggest that altering the collar cross-sectional geometry, length and expansion-ratio remains to be more effective control techniques for collared-jets. © 2009 Elsevier Inc.
Source Title: Experimental Thermal and Fluid Science
ISSN: 08941777
DOI: 10.1016/j.expthermflusci.2009.04.006
Appears in Collections:Staff Publications

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