Wake integration for three-dimensional flowfield computations: Theoretical development
This paper examines the analytical, experimental, and computational aspects of the determination of the drag acting on an aircraft in flight, with or without powered engines, for subsonic/transonic flow. Using a momentum balance approach, the drag is represented by an integral over a crossflow plane...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
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1999
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| _version_ | 1797077692805283840 |
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| author | Giles, M Cummings, R |
| author_facet | Giles, M Cummings, R |
| author_sort | Giles, M |
| collection | OXFORD |
| description | This paper examines the analytical, experimental, and computational aspects of the determination of the drag acting on an aircraft in flight, with or without powered engines, for subsonic/transonic flow. Using a momentum balance approach, the drag is represented by an integral over a crossflow plane at an arbitrary distance behind the aircraft. Asymptotic evaluation of the integral shows the drag can be decomposed into three components corresponding to streamwise vorticity and variations in entropy and stagnation enthalpy, These are related to the established engineering concepts of induced drag, wave drag, profile drag, and engine power and efficiency. This decomposition of the components of drag is useful in formulating techniques for accurately evaluating drag using computational fluid dynamics calculations or experimental data. |
| first_indexed | 2024-03-07T00:21:38Z |
| format | Journal article |
| id | oxford-uuid:7cc0dee6-4d4c-4c75-95cd-a8d20dcdbb7a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:21:38Z |
| publishDate | 1999 |
| record_format | dspace |
| spelling | oxford-uuid:7cc0dee6-4d4c-4c75-95cd-a8d20dcdbb7a2022-03-26T20:59:01ZWake integration for three-dimensional flowfield computations: Theoretical developmentJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7cc0dee6-4d4c-4c75-95cd-a8d20dcdbb7aEnglishSymplectic Elements at Oxford1999Giles, MCummings, RThis paper examines the analytical, experimental, and computational aspects of the determination of the drag acting on an aircraft in flight, with or without powered engines, for subsonic/transonic flow. Using a momentum balance approach, the drag is represented by an integral over a crossflow plane at an arbitrary distance behind the aircraft. Asymptotic evaluation of the integral shows the drag can be decomposed into three components corresponding to streamwise vorticity and variations in entropy and stagnation enthalpy, These are related to the established engineering concepts of induced drag, wave drag, profile drag, and engine power and efficiency. This decomposition of the components of drag is useful in formulating techniques for accurately evaluating drag using computational fluid dynamics calculations or experimental data. |
| spellingShingle | Giles, M Cummings, R Wake integration for three-dimensional flowfield computations: Theoretical development |
| title | Wake integration for three-dimensional flowfield computations: Theoretical development |
| title_full | Wake integration for three-dimensional flowfield computations: Theoretical development |
| title_fullStr | Wake integration for three-dimensional flowfield computations: Theoretical development |
| title_full_unstemmed | Wake integration for three-dimensional flowfield computations: Theoretical development |
| title_short | Wake integration for three-dimensional flowfield computations: Theoretical development |
| title_sort | wake integration for three dimensional flowfield computations theoretical development |
| work_keys_str_mv | AT gilesm wakeintegrationforthreedimensionalflowfieldcomputationstheoreticaldevelopment AT cummingsr wakeintegrationforthreedimensionalflowfieldcomputationstheoreticaldevelopment |