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Navier-Stokes Simulation of UH-60A Rotor/Wake Interaction Using Adaptive Mesh RefinementTime-dependent Navier-Stokes simulations have been carried out for a flexible UH-60A rotor in forward flight, where the rotor wake interacts with the rotor blades. These flow conditions involved blade vortex interaction and dynamic stall, two common conditions that occur as modern helicopter designs strive to achieve greater flight speeds and payload capacity. These numerical simulations utilized high-order spatial accuracy and delayed detached eddy simulation. Emphasis was placed on understanding how improved rotor wake resolution affects the prediction of the normal force, pitching moment, and chord force of the rotor. Adaptive mesh refinement was used to highly resolve the turbulent rotor wake in a computationally efficient manner. Moreover, blade vortex interaction was found to trigger dynamic stall. Time-dependent flow visualization was utilized to provide an improved understanding of the numerical and physical mechanisms involved with three-dimensional dynamic stall.
Document ID
20170009808
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Chaderjian, Neal M. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
October 11, 2017
Publication Date
May 9, 2017
Subject Category
Fluid Mechanics And Thermodynamics
Aeronautics (General)
Report/Patent Number
ARC-E-DAA-TN40776
Meeting Information
Meeting: AHS International Annual Forum & Technology Display
Location: Fort Worth, TX
Country: United States
Start Date: May 9, 2017
End Date: May 11, 2017
Sponsors: American Helicopter Society, Inc.
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
UH-60A RotorWake
Navier-Stokes
Adaptive Mesh

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