Dynamic flow distortion investigation in an S-duct using DDES and SPIV data

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dc.contributor.authorGil-Prieto, Daniel
dc.contributor.authorMacManus, David G.
dc.contributor.authorZachos, Pavlos K.
dc.contributor.authorTanguy, Geoffrey
dc.contributor.authorWilson, Francois
dc.contributor.authorChiereghin, Nicola
dc.date.accessioned2016-09-14T15:57:38Z
dc.date.available2016-09-14T15:57:38Z
dc.date.issued2016-06-30
dc.description.abstractThe dynamic flow distortion generated within convoluted aero-engine intakes can affect the performance and operability of the engine. There is a need for a better understanding of the main flow mechanisms which promote flow distortion at the exit of S-shaped intakes. This paper presents a detailed analysis of the main coherent structures in an S-duct flow field based on a Delayed Detached Eddy Simulation (DDES). The DDES capability to capture the characteristics of the highly unsteady flow field is demonstrated against high resolution, synchronous Stereoscopic Particle Image Velocimetry (SPIV) measurements at the Aerodynamic Interface Plane (AIP). The flow field mechanisms responsible for the main AIP perturbations are identified. Clockwise and counter-clockwise stream-wise vortices are alternately generated around the separation region at a frequency of St=0.53, which promotes the swirl switching at the AIP. Spanwise vortices are also shed from the separation region at a frequency of St=1.06, and convect downstream along the separated centreline shear layer. This results in a vertical modulation of the main loss region and a fluctuation of the velocity gradient between the high and low velocity flow at the AIP.en_UK
dc.identifier.citationDaniel Gil-Prieto, David G. MacManus, Pavlos Zachos, Geoffrey Tanguy, François Wilson, and Nicola Chiereghin. Dynamic Flow Distortion Investigation in an S-duct using DDES and SPIV data. 34th AIAA Applied Aerodynamics Conference, AIAA AVIATION Forum, 13-17 June, Washington DC, USA. Paper number AIAA 2016-3562en_UK
dc.identifier.urihttp://dx.doi.org/10.2514/6.2016-3562
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/10533
dc.language.isoenen_UK
dc.publisherAmerican Institute of Aeronautics and Astronauticsen_UK
dc.rightsAttribution-NonCommercial 4.0 Internationalen_UK
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.titleDynamic flow distortion investigation in an S-duct using DDES and SPIV dataen_UK
dc.typeConference paperen_UK

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