Loading...
Please wait, while we are loading the content...
Similar Documents
Methodology of blade unsteady pressure measurement in the nasa transonic flutter cascade
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Senyitko, R. G. Capece, V. R. Jett, T. A. McFarland, E. R. Lepicovsky, J. |
| Copyright Year | 2002 |
| Description | In this report the methodology adopted to measure unsteady pressures on blade surfaces in the NASA Transonic Flutter Cascade under conditions of simulated blade flutter is described. The previous work done in this cascade reported that the oscillating cascade produced waves, which for some interblade phase angles reflected off the wind tunnel walls back into the cascade, interfered with the cascade unsteady aerodynamics, and contaminated the acquired data. To alleviate the problems with data contamination due to the back wall interference, a method of influence coefficients was selected for the future unsteady work in this cascade. In this approach only one blade in the cascade is oscillated at a time. The majority of the report is concerned with the experimental technique used and the experimental data generated in the facility. The report presents a list of all test conditions for the small amplitude of blade oscillations, and shows examples of some of the results achieved. The report does not discuss data analysis procedures like ensemble averaging, frequency analysis, and unsteady blade loading diagrams reconstructed using the influence coefficient method. Finally, the report presents the lessons learned from this phase of the experimental effort, and suggests the improvements and directions of the experimental work for tests to be carried out for large oscillation amplitudes. |
| File Size | 30235332 |
| Page Count | 54 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20020090938 |
| Archival Resource Key | ark:/13960/t1rg0pr0v |
| Language | English |
| Publisher Date | 2002-10-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Numerical Analysis Wind Tunnels Phase Shift Data Integration Unsteady Aerodynamics Data Processing Computerized Simulation Wind Tunnel Walls Pressure Measurement Transonic Flutter Rotary Wings Influence Coefficient Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
