Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/5173
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dc.contributor.advisorGratton, GB-
dc.contributor.advisorMares, C-
dc.contributor.authorSaeed, Burhan-
dc.date.accessioned2011-05-31T12:41:54Z-
dc.date.available2011-05-31T12:41:54Z-
dc.date.issued2010-
dc.identifier.urihttp://bura.brunel.ac.uk/handle/2438/5173-
dc.descriptionThis thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University on 17/12/2010.en_US
dc.description.abstractThis research programme explores, theoretically and experimentally, a new liftsystem for Vertical/Short Take-off and Landing (V/STOL) Aircraft. It is based upon an annular wing wrapped around a centrifugal flow generator, potentially creating a vehicle with no external moving parts, reduced vehicle aerodynamic losses compared to previous V/STOL technologies and substantially eliminating induced drag. It is shown that such a wing works best with a thick aerofoil section, and appears to offer greatest potential at a micro-aerial vehicle scale with regard to fundamental performance parameter “lift to weight ratio”. Certain efficiency losses are encountered mainly occurring from annular flow expansion and problems with achieving acceptable blower slot heights. Experimental methods are described along with results, and a comparison shows that the experimental values remain below theoretical values, partly due to flow asymmetry but possibly also other factors. Symmetrical blowing, as initially hypothesised, was found to be impracticable; this suggested use of pure upper surface blowing with Coanda effect. The modified approach was further explored and proved viable. The ultimate goal of this work was to develop an understanding and the facility to integrate the annular-wing into a vehicle to achieve controlled powered flight. To serve the purpose, issues encountered on current and past V/STOL aircraft are being investigated to set a path for further research/development and to validate/justify the design of future V/STOL aircraft. Also, presented is a feasibility study where different physical scales and propulsion systems are considered, and a turbofan has shown to achieve the best performance in terms of Range and Endurance. This privilege allows one to accurately study the V/STOL technologies around.en_US
dc.description.sponsorshipProject was funded by the EPSRC CASE programme.en_US
dc.language.isoenen_US
dc.publisherBrunel University School of Engineering and Design PhD Theses-
dc.relation.urihttp://bura.brunel.ac.uk/bitstream/2438/5173/1/FulltextThesis.pdf-
dc.subjectCoanda effecten_US
dc.subjectUpper surface blowingen_US
dc.subjectFlying carsen_US
dc.subjectFlow attachmenten_US
dc.subjectAnnular wingen_US
dc.subjectBlown wingen_US
dc.subjectV/STOLen_US
dc.titleExploring the aerodynamic characteristics of a blown-annular wing for V/STOL aircraften_US
dc.typeThesisen_US
Appears in Collections:Mechanical and Aerospace Engineering
Dept of Mechanical and Aerospace Engineering Theses

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