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dc.contributor.authorMcDonald, Melea E.en_US
dc.date.accessioned2014-03-14T20:41:49Z
dc.date.available2014-03-14T20:41:49Z
dc.date.issued2010-06-25en_US
dc.identifier.otheretd-07232010-011052en_US
dc.identifier.urihttp://hdl.handle.net/10919/34124
dc.description.abstractIn recent years, research has been conducted for alternative commercial transonic aircraft design configurations, such as the strut- braced wing and the truss-braced wing aircraft designs, in order to improve aircraft performance and reduce the impact of aircraft emissions as compared to a typical cantilever wing design. Research performed by Virginia Tech in conjunction with NASA Langley Research Center shows that these alternative configurations result in 20% or more reduction in fuel consumption, and thus emissions. Another option to reduce the impact of emissions on the environment is to reduce the aircraft cruise altitude, where less nitrous oxides are released into the atmosphere and contrail formation is less likely. The following study was performed using multidisciplinary design optimization (MDO) in ModelCenterTM for cantilever wing, strut-braced wing, and truss-braced wing designs and optimized for minimum takeoff gross weight at 7730 NM range and minimum fuel weight for 7730 and 4000 NM range at the following cruise altitudes: 25,000; 30,000; and 35,000 ft. For the longer range, both objective functions exhibit a large penalty in fuel weight and takeoff gross weight due to the increased drag from the fixed fuselage when reducing cruise altitude. For the shorter range, there was a slight increase in takeoff gross weight even though there was a large increase in fuel weight for decreased cruise altitudes. Thus, the benefits of reducing cruise altitude were offset by increased fuel weight. Either a two-jury truss-braced wing or telescopic strut could be studied to reduce the fuel penalty.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartMcDonald_ME_T_2010.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectMultidisciplinary Design Optimizationen_US
dc.subjectAircraft Designen_US
dc.subjectStrut-Braced Wingen_US
dc.subjectTruss-Braced Wingen_US
dc.subjectTransonic Transporten_US
dc.titleThe Effect of Reducing Cruise Altitude on the Topology and Emissions of a Commercial Transport Aircraften_US
dc.typeThesisen_US
dc.contributor.departmentAerospace and Ocean Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineAerospace and Ocean Engineeringen_US
dc.contributor.committeechairSchetz, Joseph A.en_US
dc.contributor.committeememberKapania, Rabesh K.en_US
dc.contributor.committeememberGur, Ohaden_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07232010-011052/en_US
dc.date.sdate2010-07-23en_US
dc.date.rdate2010-09-02
dc.date.adate2010-09-02en_US


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