Accession Number : ADA135846

Title :   Experimental Investigation of Dynamic Stall.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Daley,D C

PDF Url : ADA135846

Report Date : Jul 1983

Pagination or Media Count : 82

Abstract : This thesis discusses an experimental investigation of dynamic stall for an NACA 0015 airfoil rotated at different constant angular rates. It describes a microcomputer-based automatic data acquisition system capable of acquiring 1000 items of data per second. When this information was used to predict stall and compared with film-data stall indications of the same test runs, there was excellent correlation between them. Results of the investigation showed a consistent correlation between the stall angle at dynamic conditions and the nondimensionalized angular rate. Experimental data was obtained for non-dimensional angular rates (defined as one half the chord times the angular rate divided by free stream velocity) in the range of .005 to .06. (Author)

Descriptors :   *Stalling, Airfoils, Data acquisition, Pressure transducers, Experimental data, Data reduction, Mathematical prediction, Microcomputers, FORTRAN, Lift, Angle of attack, Aerodynamic characteristics, Rotation, Rates, Boundary layer flow, Flow separation, Pressure distribution, Experimental design, High speed photography, Flow visualization, Theses

Subject Categories : Test Facilities, Equipment and Methods
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE