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Intermediate case with integrated outlet guide vanes: a concept study of the mechanical behaviour of integrated outlet guide vanes in aluminium
2002 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

As a masters thesis in mechanical design at Luleå University of Technology an intermediate case with integrated outlet guide vanes has been studied. The main focus of the thesis is to develop and investigate the mechanical behaviour of the outer part of the intermediate case structure. The overall aim is to determine how different design criteria’s affect the behaviour of an intermediate case with integrated outlet guide vanes in aluminium. The problem has been studied using different techniques. The main analysis work has been performed using a whole engine model to simulate different flight conditions and how these affect the intermediate case. These analyses were preformed with stiffness as the main dimensioning criteria. Stress analysis, using a cut-boundary methodology, was used to analyse if the stresses in the intermediate case would supersede the materials yield or ultimate tensile strength. Analyses show that there are many difficulties when replacing structural by-pass struts with aerodynamically shaped guide vanes in a load carrying structure like the intermediate case. Of most concern is the non-uniform bending of the outlet guide vane due to its airfoil shape. Because of the strict weight requirements of the intermediate case it is important to design for geometrical stiffness rather than adding material. However, geometrical stiffness can inflict on the build dimensions of the outlet guide vane. This, in turn compromising the aerodynamic performance.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Intermediate case, outlet guide vanes, IMC, OGV, mellanhus, integrated, jet engine, mechanical, konstruktion
Keyword [sv]
URN: urn:nbn:se:ltu:diva-47743ISRN: LTU-EX--02/351--SELocal ID: 541b195c-e09b-4d2b-8c50-57680cecc69bOAI: diva2:1021071
Subject / course
Student thesis, at least 30 credits
Educational program
Mechanical Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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