Hypersonic Drop-Tests of a Sphere: CFD Comparison to Experimental Results

Paper


Choudhury, R., Doig, G., Neely, A. and Barber, T.. 2010. "Hypersonic Drop-Tests of a Sphere: CFD Comparison to Experimental Results." 17th Australasian Fluid Mechanics Conference (AFMC 2010). Auckland, New Zealand 05 - 09 Dec 2010 New Zealand. pp. 465-468
Paper/Presentation Title

Hypersonic Drop-Tests of a Sphere: CFD Comparison to Experimental Results

Presentation TypePaper
AuthorsChoudhury, R., Doig, G., Neely, A. and Barber, T.
Journal or Proceedings TitleProceedings of the 17th Australasian Fluid Mechanics Conference (AFMC 2010)
Journal Citationpp. 465 - 468
Page Range465-468
Number of Pages4
Year2010
Place of PublicationNew Zealand
ISBN9781617829130
Conference/Event17th Australasian Fluid Mechanics Conference (AFMC 2010)
Event Details
17th Australasian Fluid Mechanics Conference (AFMC 2010)
Parent
Australasian Fluid Mechanics Conference
Delivery
In person
Event Date
05 to end of 09 Dec 2010
Event Location
Auckland, New Zealand
Abstract

Drop tests were performed in the T-ADFA Shock Tunnel in Canberra to determine the aerodynamic coefficients of a 37.5mm diameter polystyrene sphere experiencing short-duration (approx. 1 millisecond) Mach 10 flow. The aerodynamic forces acting on the sphere were determined from a trajectory analysis based on high-speed schlieren video footage. In order to gain a clearer understanding of the flow-field generated around the models during the tests, transient, moving-mesh computational fluid dynamics (CFD) has been used to perform simulations which approximate the conditions experienced in the shock tunnel as closely as possible. For the assumption of steady free-stream conditions the simulations predicted a sphere displacement of 13mm during the nominal 1ms of test time. The numerical displacement predictions were in good agreement with those obtained from the experiment.

KeywordsAerodynamics; Computational fluid dynamics; Computer simulation; Drops; Polystyrenes
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Byline AffiliationsUniversity of New South Wales
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