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Effect of rotor-to-stator spacing on acoustic performance of a full-scale fan (qf-5) for turbofan engines
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Stakolich, E. G. Balombin, J. R. |
| Copyright Year | 1974 |
| Description | A study was made of the effect of increasing the fan rotor-to-stator spacing on the noise level of a full-scale, single-stage, 1.6-pressure-ratio fan. Noise data were obtained with axial spacing of 1.14, 1.65, and 2.27 rotor chord lengths. Over this spacing range, data indicate a reduction of 1.5 PNdb. Apparently, rotor-alone noise at the frequency at which the rotor-stator interaction noise was cut off limited the noise reduction for the QF-5 fan. It seems, however, that the reduction in sound power level with increases in spacing is potentially about 6 db over the range of spacing tested. |
| File Size | 3826287 |
| Page Count | 72 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740025326 |
| Archival Resource Key | ark:/13960/t4xh4cj72 |
| Language | English |
| Publisher Date | 1974-09-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Test Facilities Acoustic Measurement Engine Noise Noise Reduction Data Acquisition Noise Intensity Sound Fields Rotor Stator Interactions Turbofan Engines Sound Pressure Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
