Accession Number:
AD0735205
Title:
Theoretical Investigation of Oscillatory Blade Row Aerodynamics under Unstalled Conditions,
Descriptive Note:
Corporate Author:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
Personal Author(s):
Report Date:
1971-10-28
Pagination or Media Count:
36.0
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
Descriptors:
Subject Categories:
- Fluid Mechanics
- Jet and Gas Turbine Engines