Theoretical Investigation of Oscillatory Blade Row Aerodynamics under Unstalled Conditions,
Abstract
In order to calculate the critical flutter-speed of compressor and turbine blade systems, it is necessary to carry out the numerical determination of the oscillatory aerodynamic forces and moments acting on a cascade of aerofoils. The object of this paper is to give a method for calculating these oscillatory lifts and moments for the case of an infinite, two-dimensional cascade at non-zero incidence. Arbitrary stagger and interblade phase-lag angles are permitted. The blades are supposed to be flat plates undergoing oscillatory motion consisting of flexural and torsional degrees of freedom. This paper presents a natural extension of the Whitehead method to the more general case, in which the aerodynamics of cascade blades under bending-torsion oscillation is treated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 28, 1971
- Accession Number
- AD0735205
Entities
People
- J. Stern
Organizations
- National Air and Space Intelligence Center