Accession Number : ADA306365

Title :   Advanced Imaging Techniques for Flows Past Swept Wings.

Descriptive Note : Final rept. 1 Jun 92-30 Nov 95,

Corporate Author : LEHIGH UNIV BETHLEHEM PA DEPT OF MECHANICAL ENGINEERING AND MECHANICS

Personal Author(s) : Rockwell, Donald O.

PDF Url : ADA306365

Report Date : 25 JAN 1996

Pagination or Media Count : 8

Abstract : A major goal of this investigation is to develop a high-speed laser scanning technique for characterizing the instantaneous topology and vorticity distributions over crossflow planes of a delta wing undergoing defined rolling motion at a given angle of attack. By using new types of image construction techniques, it will be possible to determine the central physics of the three-dimensional flow structure in both the early stages of vortex breakdown, as well as in fully-stalled regions along the wing. In turn, these observations provide a basis for physically interpreting the unsteady loading on the wing. Central to this interpretation are topological representations of the streamline patterns, which provide a quantitative framework for classifying the flow patterns.

Descriptors :   *FLOW VISUALIZATION, *FLOW FIELDS, *LASER VELOCIMETERS, IMAGE PROCESSING, TIME DEPENDENCE, OPTICAL IMAGES, VORTICES, ANGLE OF ATTACK, LASER BEAMS, HIGH RESOLUTION, STALLING, AERODYNAMIC LOADING, WAKE, LEADING EDGES, UNSTEADY FLOW, OPTICAL SCANNING, DELTA WINGS, PRESSURE DISTRIBUTION, IMAGE RESTORATION, CROSS FLOW, THREE DIMENSIONAL FLOW, HIGH SPEED PHOTOGRAPHY.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE