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Potential improvement of aerodynamic performance by morphing the nacelle inlet
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-2910-3770
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0002-9061-4174
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0003-0176-5358
2016 (English)In: Aerospace Science and Technology, ISSN 1270-9638, E-ISSN 1626-3219, Vol. 54, 122-131 p.Article in journal (Refereed) Published
Abstract [en]

In this work numerical investigations of the aerodynamic performance of an adaptive turbofan-engine inlet is performed. The adaptation is made on the inner front part of the symmetric inlet by changing the positions of two contour knots, which acts as a possible inlet struc- ture morphing. The contour knots are moved in the axisymmetric and radial directions of the inlet, respectively. The numerical calcula- tions are performed using Reynolds Averaged Navier-Stokes (RANS) simulations and are made for climb and cruise flight conditions. The evaluation of the aerodynamic performance is based on the absolute total pressure recovery at the fan plane. The results show that the adaptation of only a small part of the inlet contour gives benefits in the performance at different flight conditions. The radial position in- crease of the knot closer to the leading edge gives overall increase of the pressure recovery level for both flight conditions. The radial posi- tion change of the knot close to the throat diameter leads to the global maximum of absolute total pressure recovery almost independent of the axial position change of the same knot, for both flight conditions. These maximums are attained at different radial positions of the knot close to the throat diameter, for the two flight conditions.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 54, 122-131 p.
Keyword [en]
Aerodynamics, Nacelle inlet, Turbo-fan engine, Total pressure recovery, Morphing geometry
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-182666DOI: 10.1016/j.ast.2016.04.006ISI: 000378441000011ScopusID: 2-s2.0-84964786323OAI: oai:DiVA.org:kth-182666DiVA: diva2:905411
Note

QC 20160420

Available from: 2016-02-22 Created: 2016-02-22 Last updated: 2016-07-15Bibliographically approved

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Majić, FraneEfraimsson, GunillaO'Reilly, Ciarán J.
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