A study of supersonic cascade flutter

Download
Author
Chalkley, Henry George
Date
1972-06Advisor
Platzer, M.F.
Metadata
Show full item recordAbstract
Supersonic flow past oscillating flat plate cascades
with supersonic leading-edge locus is analysed using a linearized
method of characteristics valid for arbitrary frequencies
and an elementary analytical theory valid only for
low frequencies of oscillation. These two methods are extensions
of previous work by Teipel and Sauer for the single
airfoil in an unbounded supersonic flow to the case of airfoils
oscillating in cascade. Included is the determination
of pressure distribution and both a two-degree-of -freedom
(bending and torsi'on) flutter analysis and a single-degreeof-
freedom (torsion) flutter analysis. Numerically determined
flutter boundaries are presented for various primary
parameters such as, Mach number, solidity, stagger angle,
density ratio, structural damping coefficient, and elastic
axis position. Also, results are presented for the related
problem of supersonic wind tunnel interference (including
the effect of tunnel porosity) and airfoil-airfoil interference.
Collections
Related items
Showing items related by title, author, creator and subject.
-
A Study of Compressibility Effects on Dynamic Stall of Rapidly Pitching Airfoils
Carr, L.W.; Chandrasekhara, M.S. ;Results of recent experimental studies into the effect of compressibility on dynamic stall of oscillating airfoils are reviewed. Stroboscopic schlieren images of the strongly unsteady flow field are presented, showing ... -
Transition Effects on Compressible Dynamic Stall of Transiently Pitching Airfoils
Chandrasekhara, M.S.; Wilder, M.C.; Carr, L.W. (1993);Experimental results and analysis of the effects of boundary layer tripping on dynamic stall of a transiently pitching airfoil are presented. At low Mach numbers, the tripped airfoil exhibits qualitative similarity with ... -
Effect of Compressibility on Suppression of Dynamic Stall Using a Slotted Airfoil
Carr, L.W.; Chandrasekhara, M.S.; Wilder, M.C; Noonan, K.W. ;A multielement airfoil designed for helicopter application has been tested for compressible dynamic stall behavior and has been proven to be a robust dynamic stall-free concept. This slotted airfoil has operated into ...