Hostname: page-component-5c6d5d7d68-thh2z Total loading time: 0 Render date: 2024-08-15T22:44:42.236Z Has data issue: false hasContentIssue false
  • English
  • Français

Investigations of the aerodynamic performance and noise characteristics of a Dowty Rotol R212 propeller at full-scale in the 24 ft wind tunnel

Published online by Cambridge University Press:  04 July 2016

W. J. G. Trebble
W. J. G. Trebble*
Affiliation:
Aerodynamics Department, RAE Farnborough
Get access Rights & Permissions [Opens in a new window]

Summary

Propeller power absorption and thrust have been measured over a range of rotational speeds up to 1400 rev/min at mainstream airspeeds up to 48 m/s for a wide range of blade setting. In addition, cruise conditions have been simulated by maintaining the appropriate ratio of propeller tip speed to the airspeed. Generally good agreement is shown between these full scale experiments with results obtained at 1/5 scale though the effect of Mach number is observable when the propeller is highly loaded.

Noise analysis demonstrates the predominance of multiple tones whose number and intensity increase with helical-tip Mach number. An empirical formula shows that the fundamental tone varies with tip speed and power loading in a similar manner to that observed on a 1/5 scale model.

Type
Research Article
Information
The Aeronautical Journal , Volume 91 , Issue 906 , July 1987 , pp. 275 - 284
Copyright
Copyright © Royal Aeronautical Society 1987 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Williams, J. and Trebble, W. J. G., Some British research on propeller noise characteristics under low-speed wind tunnel and aircraft flight conditions. RAE Technical Memorandum Aero 1843, 1980.Google Scholar
2. Williams, J. and Holbeche, T. A., Advances in aero-acoustic wind tunnel testing techniques for wind tunnel model research. RAE Technical Memorandum Aero, 1769, 1978.Google Scholar
3. Trebble, W. J. G. The acoustic characteristics of the RAE 1-5 m acoustic tunnel. RAE Technical Report 79002, 1979.Google Scholar
4. Trebble, W. J. G. Investigation of the noise field in the vicinity of a five-bladed propeller of 2.81 m (Hartzell) in the 24 ft tunnel. RAE Technical Memorandum Aero 1993, 1984.Google Scholar
5. Trebble, W. J. G. Investigation of the aerodynamic performance and noise characteristics of a 1/5 scale model of the Dowty Rotol R212 propeller. RAE Technical Memorandum Aero 1983, 1983.Google Scholar
6. Trebble, W. J. G., Williams, J. and Donnelly, R. P. Comparative acoustic wind tunnel measurements and theoretical correlations on subsonic aircraft propellers at full-scale and model-scale. RAE Technical Memorandum 1909, 1981. AIAA Paper 81-2004, Journal of Aircraft, January 1983.Google Scholar
7. Trebble, W. J. G. Investigation of effect of blade-shape on aerodynamic performance and noise characteristics of a 0·7 m diameter propeller. RAE Technical Memorandum 1974, 1983.Google Scholar
8. Chidley, B. Private communication. BAe (Manchester Division).Google Scholar