Performance and wake analysis of rotors in axial flight using computational fluid dynamics
Flow field around rotors in axial flight is known to be complex especially in steep descent where the rotor is operating inside its own wake. It is often reported that, in this flight condition, the rotor is susceptible to severe wake interactions causing unsteady blade load, severe vibration, loss...
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| Format: | Article |
| Language: | English |
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Journal of Aerospace Technology and Management
2017
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| Online Access: | http://eprints.utm.my/76405/1/NikAhmadRidhwan2017_PerformanceandWakeAnalysisofRotors.pdf |
| _version_ | 1796862500482842624 |
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| author | Mohd., N. A. R. N. Barakos, G. |
| author_facet | Mohd., N. A. R. N. Barakos, G. |
| author_sort | Mohd., N. A. R. N. |
| collection | ePrints |
| description | Flow field around rotors in axial flight is known to be complex especially in steep descent where the rotor is operating inside its own wake. It is often reported that, in this flight condition, the rotor is susceptible to severe wake interactions causing unsteady blade load, severe vibration, loss of performance, as well as poor control and handling. So far, there is little data from experimental and numerical analysis available for rotors in axial flight. In this paper, the steady Reynolds-Averaged Navier-Stokes Computational Fluid Dynamics solver Helicopter Multi-Block was used to predict the performance of rotors in axial flight. The main objective of this study was to improve the basic knowledge about the subject and to validate the flow solver used. The results obtained are presented in the form of surface pressure, rotor performance parameters, and vortex wake trajectories. The detailed velocity field of the tip vortex for a rotor in hover was also investigated, and a strong self-similarity of the swirl velocity profile was found. The predicted results obtained when compared with available experimental data showed a reasonably agreement for hover and descent rate, suggesting unsteady solution for rotors in vortex-ring state. |
| first_indexed | 2024-03-05T20:12:33Z |
| format | Article |
| id | utm.eprints-76405 |
| institution | Universiti Teknologi Malaysia - ePrints |
| language | English |
| last_indexed | 2024-03-05T20:12:33Z |
| publishDate | 2017 |
| publisher | Journal of Aerospace Technology and Management |
| record_format | dspace |
| spelling | utm.eprints-764052018-04-30T13:26:12Z http://eprints.utm.my/76405/ Performance and wake analysis of rotors in axial flight using computational fluid dynamics Mohd., N. A. R. N. Barakos, G. TJ Mechanical engineering and machinery Flow field around rotors in axial flight is known to be complex especially in steep descent where the rotor is operating inside its own wake. It is often reported that, in this flight condition, the rotor is susceptible to severe wake interactions causing unsteady blade load, severe vibration, loss of performance, as well as poor control and handling. So far, there is little data from experimental and numerical analysis available for rotors in axial flight. In this paper, the steady Reynolds-Averaged Navier-Stokes Computational Fluid Dynamics solver Helicopter Multi-Block was used to predict the performance of rotors in axial flight. The main objective of this study was to improve the basic knowledge about the subject and to validate the flow solver used. The results obtained are presented in the form of surface pressure, rotor performance parameters, and vortex wake trajectories. The detailed velocity field of the tip vortex for a rotor in hover was also investigated, and a strong self-similarity of the swirl velocity profile was found. The predicted results obtained when compared with available experimental data showed a reasonably agreement for hover and descent rate, suggesting unsteady solution for rotors in vortex-ring state. Journal of Aerospace Technology and Management 2017 Article PeerReviewed application/pdf en http://eprints.utm.my/76405/1/NikAhmadRidhwan2017_PerformanceandWakeAnalysisofRotors.pdf Mohd., N. A. R. N. and Barakos, G. (2017) Performance and wake analysis of rotors in axial flight using computational fluid dynamics. Journal of Aerospace Technology and Management, 9 (2). pp. 184-193. ISSN 1984-9648 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85018820003&doi=10.5028%2fjatm.v9i2.623&partnerID=40&md5=657069706a5a724e52134672518b55b0 DOI:10.5028/jatm.v9i2.623 |
| spellingShingle | TJ Mechanical engineering and machinery Mohd., N. A. R. N. Barakos, G. Performance and wake analysis of rotors in axial flight using computational fluid dynamics |
| title | Performance and wake analysis of rotors in axial flight using computational fluid dynamics |
| title_full | Performance and wake analysis of rotors in axial flight using computational fluid dynamics |
| title_fullStr | Performance and wake analysis of rotors in axial flight using computational fluid dynamics |
| title_full_unstemmed | Performance and wake analysis of rotors in axial flight using computational fluid dynamics |
| title_short | Performance and wake analysis of rotors in axial flight using computational fluid dynamics |
| title_sort | performance and wake analysis of rotors in axial flight using computational fluid dynamics |
| topic | TJ Mechanical engineering and machinery |
| url | http://eprints.utm.my/76405/1/NikAhmadRidhwan2017_PerformanceandWakeAnalysisofRotors.pdf |
| work_keys_str_mv | AT mohdnarn performanceandwakeanalysisofrotorsinaxialflightusingcomputationalfluiddynamics AT barakosg performanceandwakeanalysisofrotorsinaxialflightusingcomputationalfluiddynamics |