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Acoustic and aerodynamic performance of a 1.5-pressure-ratio, 1.83-meter (6 ft) diameter fan stage for turbofan engines (qf-2)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Balombin, J. R. Lucas, J. G. Woodward, R. P. |
| Copyright Year | 1977 |
| Description | The fan was externally driven by an electric motor. Design features for low-noise generation included the elimination of inlet guide vanes, long axial spacing between the rotor and stator blade rows, and the selection of blade-vane numbers to achieve duct-mode cutoff. The fan QF-2 results were compared with those of another full-scale fan having essentially identical aerodynamic design except for nozzle geometry and the direction of rotation. The fan QF-2 aerodynamic results were also compared with those obtained from a 50.8 cm rotor-tip-diameter model of the reverse rotation fan QF-2 design. Differences in nozzle geometry other than exit area significantly affected the comparison of the results of the full-scale fans. |
| File Size | 4840342 |
| Page Count | 58 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19770014107 |
| Archival Resource Key | ark:/13960/t78s9hr4j |
| Language | English |
| Publisher Date | 1977-04-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Nozzle Geometry Acoustic Properties Engine Noise Noise Reduction Pressure Distribution Aerodynamic Noise Turbofan Engines Electric Motors Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
