Agarwal, Dheeraj

Cameron, Neil

Lu, Linghai

Padfield, Gareth

White, Mark

University of Liverpool Repository

Rotorcraft Simulation Fidelity Improvements Through an Augmented Rotor Inflow Model

In rotorcraft research, the prediction of correct off-axis response using a simulation model is a challenging task,particularly for hover and low-speed flight. This can be attributed to the complex aeromechanical behaviourexhibited by a rotorcraft, including the unsteady and hysteretic nature of the main rotor wake and its couplingwith the fuselage and empennage in manoeuvring flight. A traditional approach to improve the off-axisresponse prediction is to include the manoeuvre wake distortion effect arising from the variation of the inducedinflow through the rotor disc. Various approaches have been developed to deal with this phenomenon butusually demand prerequisites of high levels of expertise and profound aerodynamic knowledge. This paperpresents a new and practical approach to capturing this wake distortion through an augmented rotor inflowmodel. The proposed model is integrated into a nonlinear simulation using the FLIGHTLAB environment. Theresponse comparisons between the simulation and flight test in hover indicate the good quality of the proposedmodel. The results reported are part of ongoing research at Liverpool and its partner Institutions into rotorcraftsimulation fidelity for predicting dynamic behaviour for operationally-relevant mission-task-elements

Padfield, Gareth D.

White, Mark D.

Queen's University Belfast Research Portal

http://livrepository.liverpool.ac.uk/3134263/1/ERF_SMWD_FinalSubmission.pdf

Rotorcraft Simulation Fidelity Improvements Through an Augmented Rotor Inflow Model

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University of Liverpool Repository

Queen's University Belfast Research Portal