Novel method for evaluating intake unsteady flow distortion

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dc.contributor.authorMigliorini, Matteo
dc.contributor.authorZachos, Pavlos K.
dc.contributor.authorMacManus, David G.
dc.date.accessioned2021-09-14T09:48:09Z
dc.date.available2021-09-14T09:48:09Z
dc.date.issued2021-09-13
dc.description.abstractCloser integration between the airframe and the propulsion system is expected for future aircraft to reduce fuel consumption, emissions, weight and drag. The use of embedded or partially embedded propulsion systems will require the use of complex intakes. However, this can result in unsteady flow distortion which can adversely affect the propulsion system efficiency and stability. Relative to conventional measurement systems, time-resolved Particle Image Velocimetry provides sufficient spatial and temporal resolution to enable the development of new methods to assess unsteady flow distortion. This work proposes a novel analysis approach to assess the unsteady flow distortion. For an S-duct configuration, the method was successfully used to evaluate the unsteady flow distortion in terms of idealized incidence angle perturbations. This example showed peaks up to ± 30° incidence and a duration equivalent to the passing time of 3 blades. The introduction of a non-uniform total pressure profile at the S-duct inlet increased the probability of peak distortion events with higher magnitude. The method provides an estimate of the likelihood, magnitude and duration of distortion events and is a new way to evaluate flow distortion that could induce instabilities for the propulsion system.en_UK
dc.identifier.citationMigliorini M, Zachos PK, MacManus DG. (2022) Novel method for evaluating intake unsteady flow distortion. Journal of Propulsion and Power, Volume 38, Number 1, January–February 2022, pp. 135-147en_UK
dc.identifier.issn0748-4658
dc.identifier.urihttps://doi.org/10.2514/1.B38127
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/17074
dc.language.isoenen_UK
dc.publisherAIAAen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectUnsteady aero-engine flow distortion
dc.subjectS-duct intake
dc.subjectParticle Image Velocimetry
dc.subjectInlet distortion
dc.subjectSwirl distortion
dc.subjectUnsteady incidence fluctuations
dc.titleNovel method for evaluating intake unsteady flow distortionen_UK
dc.typeArticleen_UK

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