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Rotating rake turbofan duct mode measurement system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sutliff, Daniel L. |
| Copyright Year | 2005 |
| Description | An experimental measurement system was developed and implemented by the NASA Glenn Research Center in the 1990s to measure turbofan duct acoustic modes. The system is a continuously rotating radial microphone rake that is inserted into the duct. This Rotating Rake provides a complete map of the acoustic duct modes present in a ducted fan and has been used on a variety of test articles: from a low-speed, concept test rig, to a full-scale production turbofan engine. The Rotating Rake has been critical in developing and evaluating a number of noise reduction concepts as well as providing experimental databases for verification of several aero-acoustic codes. More detailed derivation of the unique Rotating Rake equations are presented in the appendix. |
| File Size | 3914251 |
| Page Count | 34 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050237891 |
| Archival Resource Key | ark:/13960/t0dv6h914 |
| Language | English |
| Publisher Date | 2005-10-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Ducted Fans Acoustic Properties Noise Reduction Turbofans Low Speed Aerodynamic Noise Turbofan Engines Acoustic Ducts Rotation Aeroacoustics 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 |
