Accession Number : ADA320134

Title :   The Characterisation & Modification of Wakes from Lifting Vehicles in Fluids (La Caracterisation et la modification des Sillages Crees dans les Fluides par des Vehicules Portant),

Corporate Author : ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT NEUILLY-SUR-SEINE (FRAN CE)

Personal Author(s) : McCroskey, W. J.

PDF Url : ADA320134

Report Date : NOV 1996

Pagination or Media Count : 419

Abstract : The aim of this symposium was to bring together researchers, engineers, and civil aviation representatives working in the field of aircraft wakes. Aircraft wake research has been supported by many organizations such as FAA, NASA, DLR, ONERA, aircraft manufacturers and others, and significant advances have been made in prediction, methodology, and experimental techniques. A review of the state-of-the-art was appropriate. The aircraft separation necessary to avoid the hazard of vortex encounters must be maintained despite the increasing number of airports and of commercial aircraft per airport. In addition, wakes are becoming more and more important in the detection of military aircraft. Techniques leading to a premature vortex decay or breakdown are of great interest. Economically efficient aircraft spacing requires an accurate prediction of vortex formation, evolution, decay and breakdown. Presentations focused on the following areas: (1) Regulatory Viewpoints, (2) Aircraft Spacing Considerations, (3) Vortex Wake Structure, (4) Vortex Instabilities and Breakdown, (5) Aircraft Vortex Interactions, and (6) Atmospheric Effects on Wakes. Currently, operators and regulators are concerned with improved detection and avoidance procedures as a means to allow reduced aircraft separation near airports. The fluid dynamics community can contribute by providing better approximate models of wake decay, better models of rolling moments for various generating aircraft, and better predictions and means of detecting vortex wakes.

Descriptors :   *VORTICES, *WAKE, COMPUTERIZED SIMULATION, NATO, SYMPOSIA, AERODYNAMIC STABILITY, AIRCRAFT DETECTION, TURBULENCE, COMPUTATIONAL FLUID DYNAMICS, VORTEX SHEDDING, FLOW FIELDS, WIND SHEAR, UNSTEADY FLOW, TRANSPORT AIRCRAFT, INVISCID FLOW, AIR TRAFFIC, WING BODY CONFIGURATIONS, AERODYNAMIC LIFT, JET FLOW, AERODYNAMICS, LIFTING SURFACES.

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE