Characteristics of unsteady total pressure distortion for a complex aero-engine intake duct

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dc.contributor.authorTanguy, Geoffrey
dc.contributor.authorMacManus, David G.
dc.contributor.authorGarnier, Eric
dc.contributor.authorMartin, Peter G.
dc.date.accessioned2018-05-08T10:31:34Z
dc.date.available2018-05-08T10:31:34Z
dc.date.issued2018-04-24
dc.description.abstractSome types of aero-engine intake systems are susceptible to the generation of secondary flows with high levels of total pressure fluctuations. The resulting peak distortion events may exceed the tolerance level of a given engine, leading to handling problems or to compressor surge. Previous work used distortion descriptors for the assessment of intake-engine compatibility to characterise modestly curved intakes where most of the self-generated time-dependent distortion was typically found to be dominated by stochastic events. This work investigates the time-dependent total pressure distortion at the exit of two high off-set diffusing S-duct intakes with the aim of establishing whether this classical approach, or similar, could be applied in these instances. The assessment of joint probability maps for time dependent radial and circumferential distortion metrics demonstrated that local ring-based distortion descriptors are more appropriate to characterise peak events. Extreme Value Theory (EVT) was applied to predict the peak distortion levels that could occur for a test time beyond the experimental data set available. Systematic assessments of model sensitivities to the de-clustering frequency, the number of exceedances and sample time length were used to extend the EVT application to local distortion descriptors and to provide guidelines on its usage.en_UK
dc.identifier.citationTanguy G, MacManus DG, Garnier E, Martin PG. (2018) Characteristics of unsteady total pressure distortion for a complex aero-engine intake duct. Aerospace Science and Technology, Volume 78, July 2018, pp. 297-311en_UK
dc.identifier.cris20309549
dc.identifier.issn1270-9638
dc.identifier.urihttps://doi.org/10.1016/j.ast.2018.04.031
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13190
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectUnsteady total pressure distortion;en_UK
dc.subjectS-duct intakeen_UK
dc.subjectExtreme value theoryen_UK
dc.titleCharacteristics of unsteady total pressure distortion for a complex aero-engine intake ducten_UK
dc.typeArticleen_UK

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