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CFD predictions of the influence of external airflow on helicopter operations when operating from ship flight decks

Record type: Conference or Workshop Item (Paper)

A CFD model of a hovering helicopter main rotor is developed to examine airflow in the presence of ship structures and side winds. The rotor is modelled by modifying the governing Navier-Stokes equations in the region of the disc. The extra terms added to the governing equations apply a downforce to the fluid; these forces are independent of the flow around the rotor and equal to the helicopter weight. The boundaries of the computational domain are also modified in order to generate a physically correct solution. Flow solutions in both two and three dimensions are achieved using the commercial flow solver CFX 4.1. The flow solutions exhibit very good correlation with established momentum and power principles. In order to model helicopter operations from a ship's flight deck, typically a frigate, the rotor is modelled at several positions above a ship profile. Cross winds are applied to the computational domain. The thrust of the rotor is held constant and the resulting flow solutions are calculated. The power exerted at the rotor is obtained and compared to the ideal hover condition and computational flow solution.

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Citation

Wakefield, N.H., Newman, S.J. and Wilson, P.A. (1998) CFD predictions of the influence of external airflow on helicopter operations when operating from ship flight decks In RTO Applied Vehicle Technology Panel Symposium: Fluid Dynamics Problems of Vehicles Operating Near or in the Air-Sea Interface. Research and Technology Organization. 10 pp, pp. 1-10.

More information

Published date: September 1998
Venue - Dates: RTO Applied Vehicle Technology Panel Symposium: Fluid Dynamics Problems of Vehicles Operating Near or in the Air-Sea Interface, 1998-10-05 - 1998-10-08
Keywords: helicopter, external flow, wind effect, ship deck, computational fluid dynamics, helicopter rotor, boundary condition, numerical simulation, aircraft
Organisations: Aerodynamics & Flight Mechanics, Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 51111
URI: http://eprints.soton.ac.uk/id/eprint/51111
ISBN: 928370004X
PURE UUID: 22a9ee93-523b-4259-85a0-364a385e8f80
ORCID for P.A. Wilson: ORCID iD orcid.org/0000-0002-6939-682X

Catalogue record

Date deposited: 06 May 2008
Last modified: 17 Jul 2017 14:49

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