Accession Number : ADP006222

Title :   Experimental Investigations of Buffet Excitation Forces on a Low Aspect Ratio Trapezoidal Half Wing in Incompressible Flow,

Corporate Author : DEUTSCHE FORSCHUNGSANSTALT FUER LUFT- UND RAUMFAHRT GOETTINGEN (GERMANY F R)

Personal Author(s) : Bublitz, P. ; Zingel, H.

Report Date : SEP 1990

Pagination or Media Count : 19

Abstract : This paper addresses the problem of determining the steady and unsteady airloads on swept wings of low aspect ratios at high incidences. Despite great progress in the field of computational fluid dynamics (CFD), this problem is not yet accessible to computer-supported methods, at least with respect to unsteady airloads. First, the information is discussed which is necessary for buffeting prediction. The reasons for performing pressure measurements are outlined. Then, a brief description of the test set-up and instrumentation will be given. The steady and unsteady test results are presented and their strong mutual interdependency is demonstrated. The question as to whether it is possible to separate the unsteady pressures due to flow separation from those due to oscillatory motion of the model is answered on the basis of experimental results.

Descriptors :   *SWEPT WINGS, *AERODYNAMIC LOADING, UNSTEADY FLOW, BUFFETING, ASPECT RATIO, PRESSURE MEASUREMENT, PRESSURE DISTRIBUTION, MODEL TESTS, FLOW SEPARATION, OSCILLATION, AIRFRAMES, DAMPING, MATHEMATICAL PREDICTION, WEST GERMANY.

Subject Categories : Aerodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE