An assessment of OpenFOAM solver on RANS simulations of round supersonic free jets

Numerical performance of rhoCentralFoam, a compressible solver in OpenFOAM, was studied by modeling round supersonic free jets with varying nozzle exit conditions through Reynolds-Averaged Navier-Stokes approach. To understand the behavior and accuracy of the solver, simulations were conducted at fo...

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Main Authors: Lim, Desmond Haoxiang, Wei, Xiaofeng, New, Tze How, Zang, B., US, Vevek
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/107565
http://hdl.handle.net/10220/50317
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1075652023-03-04T17:22:18Z An assessment of OpenFOAM solver on RANS simulations of round supersonic free jets Lim, Desmond Haoxiang Wei, Xiaofeng New, Tze How Zang, B. US, Vevek School of Mechanical and Aerospace Engineering Singapore National Supercomputing Center (NSCC) Temasek Laboratory at National University of Singapore Supersonic Jets Engineering::Aeronautical engineering Numerical performance of rhoCentralFoam, a compressible solver in OpenFOAM, was studied by modeling round supersonic free jets with varying nozzle exit conditions through Reynolds-Averaged Navier-Stokes approach. To understand the behavior and accuracy of the solver, simulations were conducted at four different nozzle pressure ratios (i.e. NPR = 2.8, 3.4, 4 and 5), corresponding to over-, perfectly-, moderately under- and highly under-expanded exit conditions, respectively. The simulated results were subsequently validated against qualitative and quantitative experimental results and good overall agreements can be observed, in terms of the shock structures along the jet core as well as the mixing characteristics through velocity decay and shear layer growth. In particular, the predicted lengths of the first shock cell were within 4% of those measured from experiments. However, the jet shear layers determined from k-ω SST model showed wider spread and hence over-estimating the jet mixing behavior. Nevertheless, the discrepancies were still deemed to be within acceptable range (<10%). In addition, results obtained from comparisons with commercial CFD solver also demonstrate certain advantages in numerical accuracy for rhoCentralFoam solver, under the present simulation conditions. MOE (Min. of Education, S’pore) Accepted version 2019-11-04T02:56:07Z 2019-12-06T22:34:12Z 2019-11-04T02:56:07Z 2019-12-06T22:34:12Z 2018 Journal Article Zang, B., US, V., Lim, D. H., Wei, X., & New, T. H. (2018). An assessment of OpenFOAM solver on RANS simulations of round supersonic free jets. Journal of Computational Science, 28, 18-31. doi:10.1016/j.jocs.2018.07.002 1877-7503 https://hdl.handle.net/10356/107565 http://hdl.handle.net/10220/50317 10.1016/j.jocs.2018.07.002 en Journal of Computational Science © 2018 Elsevier B.V. All rights reserved. This paper was published in Journal of Computational Science and is made available with permission of Elsevier B.V. 41 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Supersonic
Jets
Engineering::Aeronautical engineering
spellingShingle Supersonic
Jets
Engineering::Aeronautical engineering
Lim, Desmond Haoxiang
Wei, Xiaofeng
New, Tze How
Zang, B.
US, Vevek
An assessment of OpenFOAM solver on RANS simulations of round supersonic free jets
description Numerical performance of rhoCentralFoam, a compressible solver in OpenFOAM, was studied by modeling round supersonic free jets with varying nozzle exit conditions through Reynolds-Averaged Navier-Stokes approach. To understand the behavior and accuracy of the solver, simulations were conducted at four different nozzle pressure ratios (i.e. NPR = 2.8, 3.4, 4 and 5), corresponding to over-, perfectly-, moderately under- and highly under-expanded exit conditions, respectively. The simulated results were subsequently validated against qualitative and quantitative experimental results and good overall agreements can be observed, in terms of the shock structures along the jet core as well as the mixing characteristics through velocity decay and shear layer growth. In particular, the predicted lengths of the first shock cell were within 4% of those measured from experiments. However, the jet shear layers determined from k-ω SST model showed wider spread and hence over-estimating the jet mixing behavior. Nevertheless, the discrepancies were still deemed to be within acceptable range (<10%). In addition, results obtained from comparisons with commercial CFD solver also demonstrate certain advantages in numerical accuracy for rhoCentralFoam solver, under the present simulation conditions.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Lim, Desmond Haoxiang
Wei, Xiaofeng
New, Tze How
Zang, B.
US, Vevek
format Article
author Lim, Desmond Haoxiang
Wei, Xiaofeng
New, Tze How
Zang, B.
US, Vevek
author_sort Lim, Desmond Haoxiang
title An assessment of OpenFOAM solver on RANS simulations of round supersonic free jets
title_short An assessment of OpenFOAM solver on RANS simulations of round supersonic free jets
title_full An assessment of OpenFOAM solver on RANS simulations of round supersonic free jets
title_fullStr An assessment of OpenFOAM solver on RANS simulations of round supersonic free jets
title_full_unstemmed An assessment of OpenFOAM solver on RANS simulations of round supersonic free jets
title_sort assessment of openfoam solver on rans simulations of round supersonic free jets
publishDate 2019
url https://hdl.handle.net/10356/107565
http://hdl.handle.net/10220/50317
_version_ 1759857516693422080