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Energy Absorption & Improvement Of 1/3 Disc Fragment Model For Turbofan Fan Stage In The Rotor Burst Analysis
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Flight Dynamics.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The 1/3 disc fragment model for fan disc burst shall allow aircraft manufacturers to minimize the hazards to the aeroplane without unnecessarily constraining its design. This paper presents a finite energy approach, along with its benefit assessment on the electrical segregation height and rapid decompression rotor burst design constraints. The fan case energy absorption is estimated through the AGARD impact mechanics formula, considering its capability to withstand fan blade-off events. The results for a standardized single-aisle engine suggest 34% energy absorption, 95mm minimum electrical segregation height decrease and 83% rapid decompression maximum opening decrease. The first estimation of energy absorption shows that it is unlikely that the fan retention belt would retain the 1/3 disc fragment. Assumptions regarding material failure, ring shape effect, and blade deformation energy absorption could be refined.

Place, publisher, year, edition, pages
2015. , 11 p.
TRITA-AVE, ISSN 1651-7660 ; 2015:77
Keyword [en]
Fan, Disc, Fragment, Agard, Absorption
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-185216OAI: diva2:919306
Available from: 2016-04-13 Created: 2016-04-13 Last updated: 2016-04-13Bibliographically approved

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