Accession Number : ADP005888

Title :   Short Duration Flow Establishment on a Profile in a Water-Ludweig-Tunnel,

Corporate Author : TECHNISCHE HOCHSCHULE AACHEN (GERMANY F R)

Personal Author(s) : Kerres, W. ; Groenig, H.

Report Date : JUN 1987

Pagination or Media Count : 12

Abstract : This paper deals with the time dependent establishment of the flow field on an airfoil in unsteady flow. The impulsive start of the flow is achieved in a Water-Ludwieg-Tunnel. By using a coded particle tracing method for flow visualization, the detailed flow establishment on a NACA 0012 airfoil at 30 deg angle of attack is shown from the beginning where potential flow exists with zero circulation to a 'quasi-steady' formation of the vortex street.

Descriptors :   *UNSTEADY FLOW, AIRFOILS, FLOW FIELDS, TIME DEPENDENCE, ANGLE OF ATTACK, FLOW VISUALIZATION, VORTICES, VORTEX SHEDDING, WATER TUNNELS, ACCELERATION, PULSES, WEST GERMANY.

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE