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Boundary Layer Ingestion: EN KONCEPTSTUDIE
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2015 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Jordens befolkning står inför en global katastrof om inte mängden växthusgaser iatmosfären reduceras till hållbara nivåer. I en alltmer globaliserad värld bidrarflygplansindustrin till en allt större andel utsläpp som endast kommer att öka ominga drastiska åtgärder vidtas.

Detta kandidatexamensarbete syftar till att studera vilken bränslereduktion manidealt kan erhålla genom att utnyttja så kallad Distributed Propulsion-konfigurering.Detta innebär att en rad eldrivna propellrar placeras längst med vingens bakkant medsyfte at fylla ut den bakom vingen uppkomna vaken. Tekniken med vakutfyllnad ärväletablerad inom marinteknologin och benämns som Boundary layer Ingestion.Resultatet framtas genom matematiska modeller och befintlig data för ett Cessna 172flygplan.

En möjlig bränslereduktion på 11% fastslås för ett helt idealiserat fall vilket tolkassom ett mycket gott resultat som indikerar på att BLI-tekniken är värd att studeranärmare och utveckla vidare.

Abstract [en]

The inhabitants of the earth are facing a global crisis unless the amount ofgreenhouse gases in the atmosphere is reduced to sustainable levels. In anincreasingly globalized world the aircraft industry contributes to an increasinglyamount of emissions that will only increase further if no drastic measures are taken.

This bachelor thesis aims to study the fuel reduction that in ideal cases can beobtained by utilizing the so-called distributed propulsion configuration. This meansthat a series of electrically driven propellers are placed at the trailing edge of the wingwith purpose to fill the arisen wake behind the wing. The method is well establishedin the marine technology and is referred as the Boundary Layer Ingestion. The resultin the paper is derived from mathematical models and existing data from a Cessna172 aircraft.

A possible fuel reduction of 11% is derived for a completely idealized situation whichis considered as a very good result which indicates that the BLI technology is worthstudying more closely and develop further.

Place, publisher, year, edition, pages
2015. , 50 p.
National Category
Aerospace Engineering
Identifiers
URN: urn:nbn:se:kth:diva-173391OAI: oai:DiVA.org:kth-173391DiVA: diva2:852972
Available from: 2015-09-10 Created: 2015-09-10 Last updated: 2015-09-10Bibliographically approved

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