Validation for Aerodynamic Performance on Over-Expanded State of Single Expansion Ramp Nozzle Configuration
The performance of a single expansion ramp nozzle (SERN) drastically declines on over-expanded conditions. A numerical code can accurately predict nozzle performance in the over-expanded state, which is crucial for the SERN configuration design. A Reynolds-averaged Navier–Stokes (RANS) simulation of...
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MDPI AG
2022-11-01
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| Series: | Aerospace |
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| Online Access: | https://www.mdpi.com/2226-4310/9/11/715 |
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| author | Ye Chen Zhongxi Hou Bingjie Zhu Zheng Guo Boting Xu |
| author_facet | Ye Chen Zhongxi Hou Bingjie Zhu Zheng Guo Boting Xu |
| author_sort | Ye Chen |
| collection | DOAJ |
| description | The performance of a single expansion ramp nozzle (SERN) drastically declines on over-expanded conditions. A numerical code can accurately predict nozzle performance in the over-expanded state, which is crucial for the SERN configuration design. A Reynolds-averaged Navier–Stokes (RANS) simulation of the SERN jet in an over-expanded state was performed to verify the numerical performance of the well-established commercial CFD solver (ANSYS Fluent<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mi>TM</mi></msup></semantics></math></inline-formula> v202) and rhoCentralFoam solver in OpenFOAM. The wall pressure distributions and flow field characteristics including the shock structures and the width of the jet were studied in detail with an inlet nozzle pressure ratio (NPR) of 1.5, 3, 4, and 8. The SERN aerodynamic performance with an inlet NPR ranging from 1.5 to 9 was then calculated. The results showed that the Fluent 3D simulation could qualitatively predict the characteristics of the internal and external flow of the nozzle, because it overestimated the wall pressure and shock wave position. Two-dimensional (2D) simulations made it difficult to capture the external flow structure due to the 3D effects. The simulation results of rhoCentralFoam for over-expanded SERN flow were not ideal. The Fluent can produce physical solutions, and it achieved limited success. The existing errors were mainly caused by the inlet boundary setting. |
| first_indexed | 2024-03-09T18:32:17Z |
| format | Article |
| id | doaj.art-75629ad2d38f4cbb8b597f2a0c045061 |
| institution | Directory Open Access Journal |
| issn | 2226-4310 |
| language | English |
| last_indexed | 2024-03-09T18:32:17Z |
| publishDate | 2022-11-01 |
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| series | Aerospace |
| spelling | doaj.art-75629ad2d38f4cbb8b597f2a0c0450612023-11-24T07:24:23ZengMDPI AGAerospace2226-43102022-11-0191171510.3390/aerospace9110715Validation for Aerodynamic Performance on Over-Expanded State of Single Expansion Ramp Nozzle ConfigurationYe Chen0Zhongxi Hou1Bingjie Zhu2Zheng Guo3Boting Xu4College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaCollege of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaCollege of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaCollege of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaConsulting Center for Strategic Assessments, Academy of Military Sciences, Beijing 100091, ChinaThe performance of a single expansion ramp nozzle (SERN) drastically declines on over-expanded conditions. A numerical code can accurately predict nozzle performance in the over-expanded state, which is crucial for the SERN configuration design. A Reynolds-averaged Navier–Stokes (RANS) simulation of the SERN jet in an over-expanded state was performed to verify the numerical performance of the well-established commercial CFD solver (ANSYS Fluent<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mi>TM</mi></msup></semantics></math></inline-formula> v202) and rhoCentralFoam solver in OpenFOAM. The wall pressure distributions and flow field characteristics including the shock structures and the width of the jet were studied in detail with an inlet nozzle pressure ratio (NPR) of 1.5, 3, 4, and 8. The SERN aerodynamic performance with an inlet NPR ranging from 1.5 to 9 was then calculated. The results showed that the Fluent 3D simulation could qualitatively predict the characteristics of the internal and external flow of the nozzle, because it overestimated the wall pressure and shock wave position. Two-dimensional (2D) simulations made it difficult to capture the external flow structure due to the 3D effects. The simulation results of rhoCentralFoam for over-expanded SERN flow were not ideal. The Fluent can produce physical solutions, and it achieved limited success. The existing errors were mainly caused by the inlet boundary setting.https://www.mdpi.com/2226-4310/9/11/715fluentrhoCentralFoamSERNoverexpandedRANS |
| spellingShingle | Ye Chen Zhongxi Hou Bingjie Zhu Zheng Guo Boting Xu Validation for Aerodynamic Performance on Over-Expanded State of Single Expansion Ramp Nozzle Configuration Aerospace fluent rhoCentralFoam SERN overexpanded RANS |
| title | Validation for Aerodynamic Performance on Over-Expanded State of Single Expansion Ramp Nozzle Configuration |
| title_full | Validation for Aerodynamic Performance on Over-Expanded State of Single Expansion Ramp Nozzle Configuration |
| title_fullStr | Validation for Aerodynamic Performance on Over-Expanded State of Single Expansion Ramp Nozzle Configuration |
| title_full_unstemmed | Validation for Aerodynamic Performance on Over-Expanded State of Single Expansion Ramp Nozzle Configuration |
| title_short | Validation for Aerodynamic Performance on Over-Expanded State of Single Expansion Ramp Nozzle Configuration |
| title_sort | validation for aerodynamic performance on over expanded state of single expansion ramp nozzle configuration |
| topic | fluent rhoCentralFoam SERN overexpanded RANS |
| url | https://www.mdpi.com/2226-4310/9/11/715 |
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