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A discrete vortex model for the calculation of aerodynamic loads on a blade of a N-bladed helicopter rotor in rectilinear flight
Thesis (M. Ing.) -- University of Stellenbosch, 1992.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613810459672576 |
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| access_status_str | Open Access |
| author | Arnold, Jacob |
| author2 | Thiart, G. D. |
| author_browse | Arnold, Jacob Thiart, G. D. |
| author_facet | Thiart, G. D. Arnold, Jacob |
| author_sort | Arnold, Jacob |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (M. Ing.) -- University of Stellenbosch, 1992. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/69490 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:42:03.173Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/69490 A discrete vortex model for the calculation of aerodynamic loads on a blade of a N-bladed helicopter rotor in rectilinear flight Arnold, Jacob Thiart, G. D. Stellenbosch University. Faculty of Engineering. Department of Mechanical and Mechatronic Engineering. Rotors (Helicopters) -- Mathematical models Blades -- Mathematical models Aerodynamics Dissertations -- Mechanical engineering UCTD Thesis (M. Ing.) -- University of Stellenbosch, 1992. ENGLISH ABSTRACT: A model for the calculation of aerodynamic loads on a blade of a n-bladed helicopter rotor in rectilinear flight was developed and computerized. The model is based on a lifting line blade representation and a vortex lattice wake representation. Both a rigid and a semi-rigid wake geometry are available as options, while lifting line options include a classical and an extended lifting line representation. Viscous, unsteady and compressibility effects are also included as modelling options. Blade dynamics is restricted to rigid body flapping motion. A literature survey is presented, fundamental theoretical concepts are discussed, a mathematical model is derived and a discretized model is presented, including empirical modelling of blade profile aerodynamic characteristics. Calculated results are presented and compared with published experimental and calculated data, using different types of configurations and modelling options. AFRIKAANSE OPSOMMING: 'n Model vir die berekening van die lugdinamiese belading op die lem van 'n n-lem helikopterrotor is ontwikkel en gerekenariseer. Die model is gebaseer op 'n heflyn lemvoorstelling en 'n werwelrooster naloopvoorstelling. Beide 'n starre en 'n semi-starre naloopgeometriee is beskikbaar as opsies, terwyl heflyn modelleringsopsies 'n klassieke en 'n verlengde heflynvoorstelling behels. Die effekte van viskositeit, onbestendige vloei en samedrukbaarheid is ook as modelleringsopsies ingesluit. Lemdinamika is beperk tot starliggaam flapbeweging. 'n Literatuuroorsig word gelewer, fundamentele teoretiese konsepte word bespreek, en 'n wiskundige model word afgelei, gediskretiseer en geprogrammeer, insluitend empiriese modellering van die lugdinamiese karakteristieke van die lemprofiel. Berekende resultate word aangebied en vergelyk met gepubliseerde eksperimentele en berekende data, deur verskillende rotorkonfigurasies en modelleringsopsies te beskou. 2012-08-27T12:27:07Z 2012-08-27T12:27:07Z 1992 Thesis http://hdl.handle.net/10019.1/69490 en_ZA Stellenbosch University 269 pages : illustrations. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Rotors (Helicopters) -- Mathematical models Blades -- Mathematical models Aerodynamics Dissertations -- Mechanical engineering UCTD Arnold, Jacob A discrete vortex model for the calculation of aerodynamic loads on a blade of a N-bladed helicopter rotor in rectilinear flight |
| title | A discrete vortex model for the calculation of aerodynamic loads on a blade of a N-bladed helicopter rotor in rectilinear flight |
| title_full | A discrete vortex model for the calculation of aerodynamic loads on a blade of a N-bladed helicopter rotor in rectilinear flight |
| title_fullStr | A discrete vortex model for the calculation of aerodynamic loads on a blade of a N-bladed helicopter rotor in rectilinear flight |
| title_full_unstemmed | A discrete vortex model for the calculation of aerodynamic loads on a blade of a N-bladed helicopter rotor in rectilinear flight |
| title_short | A discrete vortex model for the calculation of aerodynamic loads on a blade of a N-bladed helicopter rotor in rectilinear flight |
| title_sort | discrete vortex model for the calculation of aerodynamic loads on a blade of a n bladed helicopter rotor in rectilinear flight |
| topic | Rotors (Helicopters) -- Mathematical models Blades -- Mathematical models Aerodynamics Dissertations -- Mechanical engineering UCTD |
| url | http://hdl.handle.net/10019.1/69490 |
| work_keys_str_mv | AT arnoldjacob adiscretevortexmodelforthecalculationofaerodynamicloadsonabladeofanbladedhelicopterrotorinrectilinearflight AT arnoldjacob discretevortexmodelforthecalculationofaerodynamicloadsonabladeofanbladedhelicopterrotorinrectilinearflight |