Lateral jet interaction with a supersonic crossflow

dc.contributor.advisorMacManus, David G.
dc.contributor.authorChristie, Robert
dc.date.accessioned2011-12-15T15:47:37Z
dc.date.available2011-12-15T15:47:37Z
dc.date.issued2010-10
dc.description.abstractA lateral jet in a supersonic crossflow creates a highly complex three-dimensional flow field which is not easily predicted. The aim of this research was to assess the use of a RANS based CFD method to simulate a lateral jet in supersonic crossflow interaction by comparing the performance of available RANS turbulence models. Four turbulence models were trialled in increasingly complex configurations; a flat plate, a body of revolution and a body of revolution at incidence. The results of this numerical campaign were compared to existing experimental and numerical data. Overall the Spalart-Allmaras turbulence model provided the best fit to experimental data. The performance of the lateral jet as a reaction control system was assed by calculating the force and moment amplification factors. The predicted flowfield surrounding the interaction was analysed in detail and was shown to predict the accepted shock and vortical structures. The lateral jet interaction flowfield over a body of revolution was shown to be qualitatively the same as that over a flat plate. An experimental facility was designed and manufactured allowing the study of the lateral jet interaction in Cranfield University’s 2 ½” x 2 ½” supersonic windtunnel. The interaction was studied with a freestream Mach number of 1.8, 2.4 & 3.1 and over a range of pressure ratios (50≤PR≤200). Levels of unsteadiness in the interaction were measured using high bandwidth pressure transducers. The level of unsteadiness was quantified by calculating the OASPL of the pressure signal. OASPL was found to increase with increasing levels of PR or MPR and to decrease with increases of Mach number. The levels of unsteadiness found were low with the highest levels found downstream of the jet.en_UK
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/6815
dc.language.isoenen_UK
dc.publisherCranfield Universityen_UK
dc.rights© Cranfield University 2010. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright owner.en_UK
dc.subjectHigh speed aerodynamicsen_UK
dc.subjectsonicen_UK
dc.subjectunderexpanded jeten_UK
dc.subjectreaction control systemen_UK
dc.subjectside jeten_UK
dc.titleLateral jet interaction with a supersonic crossflowen_UK
dc.typeThesis or dissertationen_UK
dc.type.qualificationlevelMastersen_UK
dc.type.qualificationnameMSc by Researchen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Robert_Christie_Thesis_2010.pdf
Size:
14.08 MB
Format:
Adobe Portable Document Format
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.79 KB
Format:
Item-specific license agreed upon to submission
Description: