Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/82308
Title: An investigation on supersonic bevelled nozzle jets
Authors: Wu, Jie
New, Tze How
Keywords: Supersonic jet
Shock cell structure
Issue Date: 2017
Source: Wu, J., & New, T. H. (2017). An investigation on supersonic bevelled nozzle jets. Aerospace Science and Technology, 63, 278-293.
Series/Report no.: Aerospace Science and Technology
Abstract: This paper reports upon a numerical and experimental study on supersonic jets exhausting from bevelled nozzles with 30° and 60° exit inclination angles. To begin with, a simple but effective method to design a shock-free convergent–divergent circular jet nozzle to produce a well-conditioned supersonic Ma = 1.5 jet based on simple circular fillets is presented. Subsequently Reynolds-Averaged Navier–Stokes simulations of circular non-bevelled and bevelled nozzle jets were performed at over-expanded, perfectly expanded and under-expanded conditions. Lastly, these supersonic jets were visualized experimentally using a modified Z-type Schlieren system. Results show that the shock cell structure within the jet potential core changes from a diamond pattern to triangular and rectangular patterns as the nozzle pressure ratio and inclination angle are varied. Furthermore, jet plumes are deflected differently when the bevelled nozzles were operated at off-design conditions, with changes to the supersonic jet potential core length. Finally, quantitative analysis of the results reveals that bevelled nozzles are able to reduce the intensity of the supersonic jet shock cell structure considerably, which is potentially useful for broadband shock-associated noise mitigation purposes.
URI: https://hdl.handle.net/10356/82308
http://hdl.handle.net/10220/43506
ISSN: 1270-9638
DOI: 10.1016/j.ast.2017.01.003
Rights: © 2017 Elsevier Masson SAS. This is the author created version of a work that has been peer reviewed and accepted for publication by Aerospace Science and Technology, Elsevier Masson SAS. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.ast.2017.01.003].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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