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dc.contributor.advisorBosman, J J
dc.contributor.authorVan Rooyen, Anrich
dc.date.accessioned2017-04-06T14:15:58Z
dc.date.available2017-04-06T14:15:58Z
dc.date.issued2015
dc.identifier.urihttp://hdl.handle.net/10394/21159
dc.descriptionMIng (Mechanical Engineering), North-West University, Potchefstroom Campus, 2016en_US
dc.description.abstractA new horizontal tailplane for a high performance sailplane was developed through multi-point aerodynamic optimisation. This was achieved through the use of logged flight data, from which the operating spectrum of the horizontal tailplane of a specific sailplane was obtained. With the operating spectrum, a modified lifting line model implementing Xfoil and the Generalised Reduced Gradient optimisation algorithm were used to optimise the aerodynamic performance of the JS1-C 21m horizontal tailplane. Verification of the planform calculations was conducted with the commercial CFD software package Star-CCM+. The k - w SST turbulence and y - Reθ transition models were used for aerodynamic analysis in the verification process. The design of new horizontal tailplane tip sections was also performed with the use of CFD. Firstly the elevator span to horizontal tailplane span ratio best suited to the operating spectrum of the horizontal tailplane was evaluated. Secondly a wingtip shape proposed by Hoerner (1965) was implemented. The flight data-based multipoint optimisation of the planform of the horizontal tailplane shows appreciable performance increases compared to a baseline tailplane. Calculations show a 14% drag reduction for the tailplane over a sample flight. The tip design also shows a drag decrease of 1.1% at 150km/h and 3.3% drag decrease at 250km/h compared to the baseline tip section shape.en_US
dc.language.isoenen_US
dc.publisherNorth-West University (South Africa) , Potchefstroom Campusen_US
dc.subjectSailplaneen_US
dc.subjectHorizontal tailplaneen_US
dc.subjectAerodynamic optimisationen_US
dc.subjectPlanform shapeen_US
dc.subjectInduced dragen_US
dc.subjectProfile dragen_US
dc.titleMulti-point aerodynamic optimisation of sailplane horizontal tailplanesen_US
dc.typeThesisen_US
dc.description.thesistypeMastersen_US


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