This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Studies of Flow Separation and Stalling on One- and Two-Element Airfoils at Low Speeds
Annotation ability available
Sector:
Language:
English
Abstract
Research has been conducted on the nature of airfoil behavior at pre- and post-separated angles of attack. Detailed wind tunnel studies have been made of boundary layer and wake fields for the GA(W)-1 airfoil, and the airfoil with a 0.3 chord Fowler flap. Experimental data are compared with theoretical predictions from a multi-element viscous flow computer program. Theoretical predictions are reasonably accurate for unseparated flows, but have serious errors when separation is present. Some recent techniques for modeling post-separated flow behavior are discussed in light of the present experiments.
Topic
Citation
Seetharam, H. and Wentz, W., "Studies of Flow Separation and Stalling on One- and Two-Element Airfoils at Low Speeds," SAE Technical Paper 770442, 1977, https://doi.org/10.4271/770442.Also In
References
- Wentz, W.H. Jr. Seetharam H.C. “Development of a Fowler Flap System for a High Performance General Aviation Airfoil.” NASA CR-2443 1974
- Stevens W.A. Goradia S.H. Braden J.A. “Mathematical Model for Two-Dimensional Multi-Component Airfoils in Viscous Flow.” NASA CR-1843 1971
- Seetharam H.C. Wentz W.H., Jr. “Experimental Studies of Flow Separation and Stalling on a Two-Dimensional Airfoil at Low Speeds.” NASA CR-2560 1975
- Seetharam H.C. Wentz, W.H. Jr. Walker J.K. “Measurement of Post-Separated Flow Fields on Airfoils.” AIAA Paper No. 75-1426
- East L.F. “Measurement of Skin Friction at Low Subsonic Speeds by the Razor-Blade Technique.” British R & M 3525
- McGhee R.J. Beasley W.D. “Low-Speed Aerodynamic Characteristics of a 17-Percent-Thick Airfoil Section Designed for General Aviation Applications.” NASA TND-7428 1973
- Seetharam H.C. Wentz, W.H. Jr. “A Low Speed Two-Dimensional Study of Flow Separation on the GA(W)-1 Airfoil with 30-Percent Chord Fowler Flap.” WSU AR 76-4 (in publication as NASA CR)
- Thomas F.C. Thompson J.F. Mastin D.W. “Numerical Solution of the Navier-Stokes Equations for Arbitrary Two-Dimensional Airfoils.” NASA SP-347 469 530 1975
- Jacob K. “Computation of Separated Incompressible Flow around Airfoil and Determination of Maximum Lift.” AVA Report 67A62 1968
- Bhatley I.C. McWhirter J.W. “Development of Theoretical Method for Two-Dimensional Multi-Element Airfoil Analysis and Design. Part I.” AFFDL-TR-12-96 1972
- Hahn M. Rubbert P.E. Mahal A.S. “Evaluation of Separation Criteria and their Application to Separated Flow Analysis.” AFFDL-TR-72-145 1973
- Jacob K. DFVLR-AVA-Internal Report 251-75A16 1975
- Skow A.M. “Approximate Methods of Calculating Post-Separated Pressure Distributions for Two-Dimensional Airfoils.” Wichita State University 1976