Analysis of the aerodynamic characteristics of an ejection seat system using computational fluid dynamics
In the present work, an investigation of the aerodynamic characteristics of an ejection seat occupant is carried out using the commercially available computational fluid dynamics software ANSYS Fluent. 3D Reynolds-averaged Navier–Stokes equations are solved to obtain the aerodynamic coefficients of...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-10-01
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| Series: | Frontiers in Mechanical Engineering |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmech.2023.1255051/full |
| _version_ | 1827800969023324160 |
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| author | Md. Mahbubur Rahman Ved Prakash Sunil Chandel D. G. Thakur Robert Čep Nitin Khedkar Sachin Salunkhe Emad S. Abouel Nasr |
| author_facet | Md. Mahbubur Rahman Ved Prakash Sunil Chandel D. G. Thakur Robert Čep Nitin Khedkar Sachin Salunkhe Emad S. Abouel Nasr |
| author_sort | Md. Mahbubur Rahman |
| collection | DOAJ |
| description | In the present work, an investigation of the aerodynamic characteristics of an ejection seat occupant is carried out using the commercially available computational fluid dynamics software ANSYS Fluent. 3D Reynolds-averaged Navier–Stokes equations are solved to obtain the aerodynamic coefficients of the ejection seat system. For this analysis, an unstructured grid is generated for the ejection seat occupant using ANSYS meshing. Validation is carried out and the performance of three different turbulence models is analyzed at Mach 0.6. Based on the most suitable turbulence model, further analysis of the aerodynamic coefficients of the ejection seat occupant is calculated at Mach numbers of 0.35, 0.45, 0.55, 0.65, and 0.75. For all values of Mach, the angle of attack is varied from −15° to 15° in 5° increments and the yaw angle is varied from 0° to 60° in 10° increments. Based on the results, it is observed that the magnitude of the axial force decreases with increasing angle of attack and yaw angle. Similarly, the normal force coefficient and pitching moment coefficient decrease with increasing angle of attack. Finally, the side force coefficient, yawing moment, and rolling moment coefficients increase with increasing yaw angle. |
| first_indexed | 2024-03-11T20:19:26Z |
| format | Article |
| id | doaj.art-69dc7b0330b14627b2fc06b79f2083ed |
| institution | Directory Open Access Journal |
| issn | 2297-3079 |
| language | English |
| last_indexed | 2024-03-11T20:19:26Z |
| publishDate | 2023-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Mechanical Engineering |
| spelling | doaj.art-69dc7b0330b14627b2fc06b79f2083ed2023-10-03T08:56:49ZengFrontiers Media S.A.Frontiers in Mechanical Engineering2297-30792023-10-01910.3389/fmech.2023.12550511255051Analysis of the aerodynamic characteristics of an ejection seat system using computational fluid dynamicsMd. Mahbubur Rahman0Ved Prakash1Sunil Chandel2D. G. Thakur3Robert Čep4Nitin Khedkar5Sachin Salunkhe6Emad S. Abouel Nasr7Department of Mechanical Engineering, Defence Institute of Advanced Technology (DU), Pune, IndiaDepartment of Mechanical Engineering, Defence Institute of Advanced Technology (DU), Pune, IndiaDepartment of Mechanical Engineering, Defence Institute of Advanced Technology (DU), Pune, IndiaDepartment of Mechanical Engineering, Defence Institute of Advanced Technology (DU), Pune, IndiaDepartment of Machining, Assembly and Engineering Metrology, Faculty of Mechanical Engineering, VSB-Technical University of Ostrava, Ostrava, CzechiaDepartment of Mechanical Engineering, Symbiosis International University, Pune, Maharashtra, IndiaDepartment of Mechanical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, IndiaDepartment of Industrial Engineering, College of Engineering, King Saud University, Riyadh, Saudi ArabiaIn the present work, an investigation of the aerodynamic characteristics of an ejection seat occupant is carried out using the commercially available computational fluid dynamics software ANSYS Fluent. 3D Reynolds-averaged Navier–Stokes equations are solved to obtain the aerodynamic coefficients of the ejection seat system. For this analysis, an unstructured grid is generated for the ejection seat occupant using ANSYS meshing. Validation is carried out and the performance of three different turbulence models is analyzed at Mach 0.6. Based on the most suitable turbulence model, further analysis of the aerodynamic coefficients of the ejection seat occupant is calculated at Mach numbers of 0.35, 0.45, 0.55, 0.65, and 0.75. For all values of Mach, the angle of attack is varied from −15° to 15° in 5° increments and the yaw angle is varied from 0° to 60° in 10° increments. Based on the results, it is observed that the magnitude of the axial force decreases with increasing angle of attack and yaw angle. Similarly, the normal force coefficient and pitching moment coefficient decrease with increasing angle of attack. Finally, the side force coefficient, yawing moment, and rolling moment coefficients increase with increasing yaw angle.https://www.frontiersin.org/articles/10.3389/fmech.2023.1255051/fullaerodynamic coefficientejection seat systemmach numberangle of attackyaw anglespecific dissipation rate |
| spellingShingle | Md. Mahbubur Rahman Ved Prakash Sunil Chandel D. G. Thakur Robert Čep Nitin Khedkar Sachin Salunkhe Emad S. Abouel Nasr Analysis of the aerodynamic characteristics of an ejection seat system using computational fluid dynamics Frontiers in Mechanical Engineering aerodynamic coefficient ejection seat system mach number angle of attack yaw angle specific dissipation rate |
| title | Analysis of the aerodynamic characteristics of an ejection seat system using computational fluid dynamics |
| title_full | Analysis of the aerodynamic characteristics of an ejection seat system using computational fluid dynamics |
| title_fullStr | Analysis of the aerodynamic characteristics of an ejection seat system using computational fluid dynamics |
| title_full_unstemmed | Analysis of the aerodynamic characteristics of an ejection seat system using computational fluid dynamics |
| title_short | Analysis of the aerodynamic characteristics of an ejection seat system using computational fluid dynamics |
| title_sort | analysis of the aerodynamic characteristics of an ejection seat system using computational fluid dynamics |
| topic | aerodynamic coefficient ejection seat system mach number angle of attack yaw angle specific dissipation rate |
| url | https://www.frontiersin.org/articles/10.3389/fmech.2023.1255051/full |
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