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Hover and forward flight acoustics and performance of a small-scale helicopter rotor system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Shinoda, P. Kitaplioglu, C. |
| Copyright Year | 1985 |
| Description | A 2.1-m diam., 1/6-scale model helicopter main rotor was tested in hover in the test section of the NASA Ames 40- by 80- Foot Wind Tunnel. Subsequently, it was tested in forward flight in the Ames 7- by 10-Foot Wind Tunnel. The primary objective of the tests was to obtain performance and noise data on a small-scale rotor at various thrust coefficients, tip Mach numbers, and, in the later case, various advance ratios, for comparisons with similar existing data on full-scale helicopter rotors. This comparison yielded a preliminary evaluation of the scaling of helicopter rotor performance and acoustic radiation in hover and in forward flight. Correlation between model-scale and full-scale performance and acoustics was quite good in hover. In forward flight, however, there were significant differences in both performance and acoustic characteristics. A secondary objective was to contribute to a data base that will permit the estimation of facility effects on acoustic testing. |
| File Size | 1347373 |
| Page Count | 33 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860009843 |
| Archival Resource Key | ark:/13960/t4km45r8p |
| Language | English |
| Publisher Date | 1985-09-13 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Sound Waves Data Acquisition Acoustics Coefficients Hovering Data Bases Rotary Wings Horizontal Flight Flight Characteristics Ratios Acoustic Properties Aircraft Noise Cruising Flight Helicopter Performance Thrust Mach Number 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 |
