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...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Online Access: | https://hdl.handle.net/10356/107565 http://hdl.handle.net/10220/50317 |
| _version_ | 1826130071195222016 |
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| author | Lim, Desmond Haoxiang Wei, Xiaofeng New, Tze How Zang, B. US, Vevek |
| 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 |
| author_sort | Lim, Desmond Haoxiang |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T07:50:33Z |
| format | Journal Article |
| id | ntu-10356/107565 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:50:33Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-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 |
| 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 |
| title | 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_short | 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 |
| topic | Supersonic Jets Engineering::Aeronautical engineering |
| url | https://hdl.handle.net/10356/107565 http://hdl.handle.net/10220/50317 |
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