Accession Number : ADA017073
Title : Unsteady Surface Flow Behavior on a Cascade of Airfoils Oscillating Below Stall.
Descriptive Note : Technical rept. Mar-Sep 75,
Corporate Author : PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS
Personal Author(s) : Carta,Franklin O.
Report Date : 29 SEP 1975
Pagination or Media Count : 65
Abstract : Tests have been performed on a cascade of airfoils oscillating in pitch using hot films to detect unsteady changes in the flow over the suction surface. It was found that unsteady transition from laminar to turbulent flow propagates forward along the chord and that unsteady reattachment propagates rearward. At low incidence angle the turbulent flow region does not reach the leading edge, and at higher incidence angle the laminar flow region does not extend rearward beyond mid chord. (Author)
Descriptors : *Airfoils, *Cascade structures, Cascades(Fluid dynamics), Stalling, Flutter, Turbulent flow, Vibration, Boundary layer transition, Free stream, Laminar flow, Pressure distribution, Suction slots, Leading edges, Angle of attack, Flow separation, Transducers, Oscillation
Subject Categories : Fluid Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE