Investigation of the unsteady reverse flow airloads at high advance ratios

dc.contributor.author Bowen-Davies, G.
dc.contributor.author Chopra, I.
dc.date.accessioned 2018-05-31T09:10:37Z
dc.date.available 2018-05-31T09:10:37Z
dc.date.issued 2015
dc.description.abstract The comprehensive analysis UMARC has been modified to include a model for dynamic stall in the reverse flow region for high advance ratio helicopter. The reverse flow stall model adapts the Leishman-Beddoes dynamic stall model with concepts from a flat plate in accelerating flow. The model is evaluated against airloads data from the reverse flow region of the UH-60A slowed rotor test at high advance ratios between ? = 0.4–1.0. The dynamic stall model predicts dynamic stall in the reverse flow for all the test cases, but does not have a significant impact on the advancing side of the rotor. At lower advance ratios (? = 0.4 and 0.6), the azimuth of dynamic stall is well predicted and the correlation with the measured airloads in the reverse flow is improved. At ? = 1.0, the model predicts multiple vortex shedding, which are present in the test, but the phase agreement is not satisfactory.
dc.identifier.other ERF2015_0122_paper
dc.identifier.uri http://hdl.handle.net/20.500.11881/3626
dc.language.iso en
dc.subject.other Dynamics
dc.title Investigation of the unsteady reverse flow airloads at high advance ratios
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