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Titre du document / Document title

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

Auteur(s) / Author(s)

WAKEFIELD N. H. (1) ; NEWMAN S. J. (2) ; WILSON P. A. (3) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Ship Science, University of Southampton, Southampton, SO17 1BJ, ROYAUME-UNI
(2) Department of Aeronautics and Astronautics, University of Southampton, Southampton, SO17 1BJ, ROYAUME-UNI
(3) gbDepartment of Ship Science, University of Southampton, Southampton, SO17 1BJ, ROYAUME-UNI

Résumé / Abstract

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

Revue / Journal Title

RTO Meeting proceedings  

Source / Source

Congrès
Fluid dynamics problems of vehicles operating near or in the air-sea interface :   ( Amsterdam, 5-8 October 1998 )  = Problèmes de dynamique des fluides des véhicules évoluant dans ou près de l'interface air-mer
RTO applied vehicle technology panel symposium, Amsterdam , PAYS-BAS (05/10/1998)
1999  , no 15, pp. 2.1-2.10[Note(s) :  [382 p.]] (3 ref.) ISBN 92-837-0004-X ;  Illustration : Illustration ;

Langue / Language

Anglais
Revue : Anglais

Editeur / Publisher

Research and Technology Organization, Neuilly-sur-Seine, FRANCE  (1999) (Monographie)

Mots-clés anglais / English Keywords

Helicopter

;

External flow

;

Wind effect

;

Ship deck

;

Computational fluid dynamics

;

Helicopter rotor

;

Boundary condition

;

Numerical simulation

;

Aircraft

;

Mots-clés français / French Keywords

Hélicoptère

;

Ecoulement externe

;

Action vent

;

Pont navire

;

Mécanique fluide numérique

;

Rotor hélicoptère

;

Condition aux limites

;

Simulation numérique

;

Aéronef

;

Mots-clés espagnols / Spanish Keywords

Helicóptero

;

Flujo externo

;

Acción viento

;

Puente navío

;

Mecánica fluido numérica

;

Rotor helicóptero

;

Condiciones límites

;

Simulación numérica

;

Aeronave

;

Localisation / Location

INIST-CNRS, Cote INIST : 13413, 35400007456867.0020

Nº notice refdoc (ud4) : 1809511



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