Assessment of unsteady-RANS approach against steady-RANS approach for predicting twin impinging jets in a cross-flow

Hdl Handle:
http://hdl.handle.net/10545/620636
Title:
Assessment of unsteady-RANS approach against steady-RANS approach for predicting twin impinging jets in a cross-flow
Authors:
Yang, Zhiyin ( 0000-0002-6629-1360 )
Abstract:
A complex flow field is created when a vertical/short take-off and landing aircraft is operating near ground. One major concern for this kind of aircraft in ground effect is the possibility of ingestion of hot gases from the jet engine exhausts back into the engine, known as hot gas ingestion, which can increase the intake air temperature and also reduce the oxygen content in the intake air, potentially leading to compressor stall, low combustion efficiency and causing a dramatic loss of lift. This flow field can be represented by the configuration of twin impinging jets in a cross-flow. Accurate prediction of this complicated flow field under the Reynolds averaged Navier–Stokes (RANS) approach (current practise in industry) is a great challenge as previous studies suggest that some important flow features cannot be captured by the Steady-RANS (SRANS) approach even with a second-order Reynolds stress model (RSM). This paper presents a numerical study of this flow using the Unsteady-RANS (URANS) approach with a RSM and the results clearly indicate that the URANS approach is superior than the SRANS approach but still the predictions of Reynolds stress are not accurate enough.
Affiliation:
University of Derby
Citation:
Yang, Z. (2014) 'Assessment of unsteady-RANS approach against steady-RANS approach for predicting twin impinging jets in a cross-flow', Cogent Engineering, 1 (1) DOI: 10.1080/23311916.2014.936995
Publisher:
Cogent OA
Journal:
Cogent Engineering
Issue Date:
31-Jul-2014
URI:
http://hdl.handle.net/10545/620636
DOI:
10.1080/23311916.2014.936995
Additional Links:
https://www.cogentoa.com/article/10.1080/23311916.2014.936995
Type:
Article
Language:
en
ISSN:
2331-1916
Appears in Collections:
Department of Mechanical Engineering & the Built Environment

Full metadata record

DC FieldValue Language
dc.contributor.authorYang, Zhiyinen
dc.date.accessioned2016-10-17T19:09:20Z-
dc.date.available2016-10-17T19:09:20Z-
dc.date.issued2014-07-31-
dc.identifier.citationYang, Z. (2014) 'Assessment of unsteady-RANS approach against steady-RANS approach for predicting twin impinging jets in a cross-flow', Cogent Engineering, 1 (1) DOI: 10.1080/23311916.2014.936995en
dc.identifier.issn2331-1916-
dc.identifier.doi10.1080/23311916.2014.936995-
dc.identifier.urihttp://hdl.handle.net/10545/620636-
dc.description.abstractA complex flow field is created when a vertical/short take-off and landing aircraft is operating near ground. One major concern for this kind of aircraft in ground effect is the possibility of ingestion of hot gases from the jet engine exhausts back into the engine, known as hot gas ingestion, which can increase the intake air temperature and also reduce the oxygen content in the intake air, potentially leading to compressor stall, low combustion efficiency and causing a dramatic loss of lift. This flow field can be represented by the configuration of twin impinging jets in a cross-flow. Accurate prediction of this complicated flow field under the Reynolds averaged Navier–Stokes (RANS) approach (current practise in industry) is a great challenge as previous studies suggest that some important flow features cannot be captured by the Steady-RANS (SRANS) approach even with a second-order Reynolds stress model (RSM). This paper presents a numerical study of this flow using the Unsteady-RANS (URANS) approach with a RSM and the results clearly indicate that the URANS approach is superior than the SRANS approach but still the predictions of Reynolds stress are not accurate enough.en
dc.language.isoenen
dc.publisherCogent OAen
dc.relation.urlhttps://www.cogentoa.com/article/10.1080/23311916.2014.936995en
dc.rightsArchived with thanks to Cogent Engineeringen
dc.subjectTwin impinging jetsen
dc.subjectURANSen
dc.subjectHGIen
dc.subjectSRANSen
dc.titleAssessment of unsteady-RANS approach against steady-RANS approach for predicting twin impinging jets in a cross-flowen
dc.typeArticleen
dc.contributor.departmentUniversity of Derbyen
dc.identifier.journalCogent Engineeringen
dc.contributor.institutionDepartment of Engineering and Design, University of Sussex Brighton BN1 9RH UK-
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