Unsteady Flow Around and Aeroelastic Vibration in Turbomachine Cascades
Abstract
Methods of calculating, and experimental results of research on, unsteady flow in aerodynamic cascades of turbomachines are set forth. The conditions of excitation and damping of blade vibration in compressible and incompressible fluid flow are considered. The theoretical methods are based upon a model of an ideal fluid. The incoming stream may be inhomogeneous and have vortices due to the influence of a preceding cascade. The experimental results pertain to determination of the dynamic stresses brought about by stream inhomogeneity in the turbomachine, as well as to determination of the unsteady aerodynamic forces which excite and damp blade vibrations. Consideration is given to the origination of cascade flutter and the effect of inhomogeneity of an aerodynamic cascade. The experimental research methods are described.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 23, 1971
- Accession Number
- AD0721959
Entities
People
- G. S. Samoilovich
Organizations
- National Air and Space Intelligence Center