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Nonmodal stability analysis of the HIFiRE-5 elliptic cone model flow in different flight altitudes
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control. KTH, Centres, SeRC - Swedish e-Science Research Centre. KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0002-5913-5431
2018 (English)In: 58th Israel Annual Conference on Aerospace Sciences, IACAS 2018, Israel Annual Conference on Aerospace Sciences , 2018, p. 1543-1555Conference paper, Published paper (Refereed)
Abstract [en]

Nonmodal instability analysis is carried out for a 2:1 elliptic cone with base flow conditions selected for a Ma=7 and two different ight altitudes, namely 33km and 21km with unit Reynolds number Re′ = 1.89 x 106 m-1 and Re′ = 1.015 x 107 m-1, respectively. The aim is to analyze the effects of transiently growing optimal disturbances and their possible relation to instability mechanisms that have been confirmed to exist in previous modal crossow. Local linear stability results obtained at several streamwise locations on the cone surface indicate that transient growth in the crossow region may be correlated to streamwise oriented structures having spanwise spacing of the same order of magnitude as which have long been known to exist in this flow.

Place, publisher, year, edition, pages
Israel Annual Conference on Aerospace Sciences , 2018. p. 1543-1555
Keywords [en]
Aerospace engineering, Cones, Reynolds equation, Reynolds number, Flight altitudes, Instability analysis, Instability mechanisms, Optimal disturbances, Oriented structure, Stability analysis, Streamwise locations, Transient growth, Stability
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-236404Scopus ID: 2-s2.0-85048983459OAI: oai:DiVA.org:kth-236404DiVA, id: diva2:1259889
Conference
58th Israel Annual Conference on Aerospace Sciences, IACAS 2018, 14 March 2018 through 15 March 2018
Note

QC 20181031

Available from: 2018-10-31 Created: 2018-10-31 Last updated: 2018-10-31Bibliographically approved

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Hanifi, Ardeshir

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Linné Flow Center, FLOWStability, Transition and ControlSeRC - Swedish e-Science Research CentreMarcus Wallenberg Laboratory MWL
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  • fi-FI
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