Modelling reverse flow dynamic stall on high advance ratio rotors

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• Anya Jones, University of Maryland
• Friday 01 June 2018, 13:00-14:00
• Cambridge University Engineering Department, LR5.

If you have a question about this talk, please contact Charlotte Coles.

A Mach-scaled slowed rotor was tested at high advance ratios and time-resolved particle image velocimetry was used to characterize the flow field around a blade element in the reverse flow region. Four dominant flow structures were observed: the reverse flow starting vortex, the blunt trailing edge wake sheet, the reverse flow dynamic stall vortex, and the tip vortex. As advance ratio increases, the duration of reduced time that the blade element spends in the reverse flow region also increases. This affects the strength, trajectory, and predicted vortex-induced pitching moment of the reverse flow dynamic stall vortex. The results of this characterization and sensitivity study are compared to canonical models of flow reversal and separation. The three-dimensional rotor flows are found to have many similarities to canonical two-dimensional models.

This talk is part of the Engineering Fluids Group Seminar series.

This talk is included in these lists:

• Cambridge University Engineering Department, LR5
• Acoustics Lab Seminars
• Engineering Department Acoustics/Combustion Student seminars
• Engineering Fluids Group Seminar

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