Unsteady aerodynamics of conventional and supercritical airfoilsThe unsteady aerodynamics of a conventional and a supercritical airfoil are compared by examining measured chordwise unsteady pressure time-histories from four selected flow conditions. Although an oscillating supercritical airfoil excites more harmonics, the strength of the airfoil's shock wave is the more important parameter governing the complexity of the unsteady flow. Whether they are conventional or supercritical, airfoils that support weak shock waves induce unsteady loads that are qualitatively predictable with classical theories; flows with strong shock waves are sensitive to details of the shock-wave and boundary-layer interaction and cannot be adequately predicted.
Document ID
19800050868
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Davis, S. S. (NASA Ames Research Center Moffett Field, CA, United States)
Malcolm, G. N. (NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 80-0734
Meeting Information
Meeting: Structures, Structural Dynamics, and Materials Conference