Dynamic Stall Experiments on the NACA 0012 Airfoil
Author : Kenneth W. McAlister
Publisher :
Page : 172 pages
File Size : 19,92 MB
Release : 1978
Category : Aerofoils
ISBN :
Author : Kenneth W. McAlister
Publisher :
Page : 172 pages
File Size : 19,92 MB
Release : 1978
Category : Aerofoils
ISBN :
Author : Sasi Kumar Digavalli
Publisher :
Page : 426 pages
File Size : 13,72 MB
Release : 1993
Category :
ISBN :
Author : Mustafa Dindar
Publisher :
Page : pages
File Size : 37,60 MB
Release : 1992
Category :
ISBN :
Author : Lawrence W. Carr
Publisher :
Page : 116 pages
File Size : 50,17 MB
Release : 1977
Category : Oscillating wings (Aerodynamics)
ISBN :
Author : Joseph Andrew Ferrari
Publisher :
Page : 186 pages
File Size : 25,44 MB
Release : 2012
Category : Aerofoils
ISBN :
Author :
Publisher :
Page : 156 pages
File Size : 42,66 MB
Release : 1971
Category :
ISBN :
Author : Myung J. Rhee
Publisher :
Page : 112 pages
File Size : 27,14 MB
Release : 2002
Category : Aerodynamic load
ISBN :
The purpose of this study is to examine the previously unpublished instantaneous pressure data of the Aeroflightdynamics Directorate Two-Dimensional (2D) and Three-Dimensional (3D) Oscillating Wing Experiment to better understand the process of dynamic stall vortex development on the NACA 0015 airfoil. This report presents representative 2D instantaneous pressure data for the upper and lower surfaces of the airfoil at various chordwise locations obtained at specific angles of attack during upstroke and downstroke cycles. Furthermore, the report contains a complete set of plots of instantaneous pressure distributions for the upper surface for all the 2D data sets obtained in the experiment. First, the lift, drag and pitching moment data of various testing conditions are reviewed and analyzed to classify the data both with and without a boundary layer trip into "no stall," "moderate stall," and "deep stall" data. Next, instantaneous pressure distributions on the upper surface of the airfoil are examined for the study of vortex development. The lift and pitching moment data are analyzed to document the dynamic overshoot which delays the development of the stall on the airfoil. Next, the range of angles of attack are selected where the lift and pitching moment data shows significant changes from unsteady flow behavior daring oscillation cycles. Furthermore, based on the unsteady flow characteristics found in each classification of dynamic stall, analysis is continued to identify the conditions where the reduced frequency clearly affects the unsteady flow behavior of the airfoil during the oscillation. This can result in a change of the dynamic stall classification of the airfoil response under various unsteady flow conditions. These conditions are discussed in detail in the comparative studies.
Author : Charles Paul Gendrich
Publisher :
Page : 344 pages
File Size : 43,6 MB
Release : 1999
Category : Aerofoils
ISBN :
Author : Kenneth W. McAlister
Publisher :
Page : 86 pages
File Size : 22,26 MB
Release : 1978
Category : Aerofoils
ISBN :
Author : Richard B. Noll
Publisher :
Page : 300 pages
File Size : 30,88 MB
Release : 1983
Category : Wind power
ISBN :