On the validation of a hypersonic flow solver using measurements of shock detachment distance

Gollan, Rowan J. and Jacobs, Peter A. (2012). On the validation of a hypersonic flow solver using measurements of shock detachment distance. In: Konstantinos Kontis, 28th International Symposium on Shock Waves Vol 1 and 2. International Symposium on Shock Waves (28th, ISSW28), Manchester, U.K., (). 17-22 July 2011.

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
UQ253347_fulltext.pdf HERDC evidence - not publicly available application/pdf 93.02KB 0
UQ253347_other.pdf HERDC evidence - not publicly available application/pdf 10.57MB 0
UQ253347_peer_review.pdf HERDC evidence - not publicly available application/pdf 27.41KB 0
UQ253347_program.pdf UQ253347_program.pdf application/pdf 862.83KB 0
Author Gollan, Rowan J.
Jacobs, Peter A.
Title of paper On the validation of a hypersonic flow solver using measurements of shock detachment distance
Conference name International Symposium on Shock Waves (28th, ISSW28)
Conference location Manchester, U.K.
Conference dates 17-22 July 2011
Proceedings title 28th International Symposium on Shock Waves Vol 1 and 2
Place of Publication Heidelberg, Germany
Publisher Springer
Publication Year 2012
Year available 2011
Sub-type Fully published paper
ISBN 9783642256875
3642256872
9783642256844
3642256848
Editor Konstantinos Kontis
Volume In Press
Total pages 6
Collection year 2013
Language eng
Formatted Abstract/Summary
When using computational fluid dynamics (CFD) codes for computing quantities for engineering purposes, it is important to have confidence in the accuracy and quality of the code. Hence, it has become important to verify and validate CFD codes. Verification refers to ensuring that the numerics of the flow solver are correctly solving the chosen set of governing equations.Validation, on the other hand, is used to check that the governing equations and associated models are appropriate to capture the physics of interest in the flow. In this paper, we undertake a validation exercies for a hypersonic flow solver for chemically reacting flows by comparing computations of shock detachment distance on spheres to experimental measurements. The particular flow solver validated is Eilmer, which has been developed (and continues to be developed) by researchers at the Centre for Hypersonics at The University of Queensland.

At certain conditions, the shock detachment distance on a sphere fired into air is sensitive to the rate of chemical reactions in the shocked flow. The experiments performed by Lobb covered some of these conditions where chemical reactions are important in the flow. Therefore, this experimental data is useful for validating a hypersonic flow solver that treats chemical nonequilibrium. Indeed, the use of Lobb’s data has been used by other researchers as a test case: Candler and Gnoffo.

An original aspect of the work presented in this paper is that a large number of conditions (186 in total) that cover the complete range of the experimental conditions used by Lobb were simulated. This large number of computations was performed in an “embarrassingly parallel” on a cluster supercomputer. An important conclusion is that the Lobb data points cannot be used in isolation as a means of validation; the value of the Lobb data for validation is in considering the trends over the range of conditions.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Publication date: April 30, 2012. Presented during the Session "Hypersonic Flows III" as Paper 2725.

 
Versions
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Created: Tue, 27 Sep 2011, 20:05:59 EST by Katie Gollschewski on behalf of School of Mechanical and Mining Engineering