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Aerodynamics of a linear oscillating cascade
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Buffum, Daniel H. Fleeter, Sanford |
| Copyright Year | 1990 |
| Description | The steady and unsteady aerodynamics of a linear oscillating cascade are investigated using experimental and computational methods. Experiments are performed to quantify the torsion mode oscillating cascade aerodynamics of the NASA Lewis Transonic Oscillating Cascade for subsonic inlet flowfields using two methods: simultaneous oscillation of all the cascaded airfoils at various values of interblade phase angle, and the unsteady aerodynamic influence coefficient technique. Analysis of these data and correlation with classical linearized unsteady aerodynamic analysis predictions indicate that the wind tunnel walls enclosing the cascade have, in some cases, a detrimental effect on the cascade unsteady aerodynamics. An Euler code for oscillating cascade aerodynamics is modified to incorporate improved upstream and downstream boundary conditions and also the unsteady aerodynamic influence coefficient technique. The new boundary conditions are shown to improve the unsteady aerodynamic influence coefficient technique. The new boundary conditions are shown to improve the unsteady aerodynamic predictions of the code, and the computational unsteady aerodynamic influence coefficient technique is shown to be a viable alternative for calculation of oscillating cascade aerodynamics. |
| File Size | 6507006 |
| Page Count | 265 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900018341 |
| Archival Resource Key | ark:/13960/t85j2f73s |
| Language | English |
| Publisher Date | 1990-08-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Computational Fluid Dynamics Phase Shift Upstream Boundary Conditions Airfoils Aerodynamic Coefficients Inlet Flow Wind Tunnel Walls Design Analysis Influence Coefficient Cascade Flow Euler Equations of Motion Flow Distribution Unsteady Aerodynamics Aerodynamic Characteristics Torsion Data Correlation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
