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Development of an unsteady aerodynamic analysis for finite-deflection subsonic cascades
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Caspar, J. R. Verdon, J. M. |
| Copyright Year | 1981 |
| Description | An unsteady potential flow analysis, which accounts for the effects of blade geometry and steady turning, was developed to predict aerodynamic forces and moments associated with free vibration or flutter phenomena in the fan, compressor, or turbine stages of modern jet engines. Based on the assumption of small amplitude blade motions, the unsteady flow is governed by linear equations with variable coefficients which depend on the underlying steady low. These equations were approximated using difference expressions determined from an implicit least squares development and applicable on arbitrary grids. The resulting linear system of algebraic equations is block tridiagonal, which permits an efficient, direct (i.e., noniterative) solution. The solution procedure was extended to treat blades with rounded or blunt edges at incidence relative to the inlet flow. |
| File Size | 4393346 |
| Page Count | 78 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810023577 |
| Archival Resource Key | ark:/13960/t4bp4wv49 |
| Language | English |
| Publisher Date | 1981-09-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Turbomachine Blades Cascade Flow Unsteady Aerodynamics Flutter Unsteady Flow Aerodynamic Forces Stability Derivatives Leading Edges Outlet Flow Potential Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
