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Circulation Control and its Application to Stopped Rotor Aircraft

Published online by Cambridge University Press:  04 July 2016

I. C. Cheeseman
I. C. Cheeseman*
Affiliation:
National Gas Turbine Establishment
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Summary

The problems associated with the design of a stopped rotor aircraft are summarised. The decision to attempt to overcome the aerodynamic difficulties by the choice of a rotor blade section which is basically insensitive to atmospheric gusts dictates a largely circular cross section. During the rotor lifting phases of the flight the circular section is constrained to lift by a technique called circulation control by blowing — this technique is described and some results presented. A scale model hingeless rotor has been tested at the National Gas Turbine Establishment. Typical performance figures are presented and their implications discussed. In particular, it is shown that operating rotors at high values of thrust coefficient per blade leads to high induced power factors. Cyclic control of rotor lift is achieved by hub throttling the air to the circulation control slots —a simple mechanism to achieve this result is described. Two possible schemes for a VTOL circulation control stopped rotor transport are discussed and compared.

Type
Supplementary Papers
Information
The Aeronautical Journal , Volume 72 , Issue 691 , July 1968 , pp. 635 - 646
Copyright
Copyright © Royal Aeronautical Society 1968 

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References

1. Lockwood, V. E. Lift generation on a circular cylinder by tangential blowing from surface slots. NASA TN D-244, May 1960.Google Scholar
2. Cheeseman, I. C. and Seed, A. R. The application of circulation control by blowing to helicopter rotors. Journal of the Royal Aeronautical Society p 451, July 1967.Google Scholar
3. Dunham, J. Circulation control applied to a circular cylinder, NGTE, Report No. R287, July 1967.Google Scholar
4. Kelly, M. W. Analysis of some parameters used in correlating blowing type boundary layer control data, NACA RMA 56, F12.Google Scholar
5. Pearcey, H. H. and Stuart, C. M. Methods of boundary layer control for postponing and alleviating buffeting and other effects of shock-induced separation, IAS National Summer Meeting, 1959, SMF Fund Paper No. FF 22.Google Scholar
6. Oliver, A. L. The low speed performance of a helicopter, ARC CP 122, May 1952.Google Scholar
7. Davidson, I. M. and Hargest, T. J. Helicopter noise, Journal of the Royal Aeronautical Society, p 653, May 1965.Google Scholar
8. Cheeseman, I. C. A method of calculating the effect of one helicopter rotor upon another, ARC CP 406, 1958.Google Scholar
9. Bryce, W. D. A human criterion for the acceptance of lateral vibration, J Sound and Vib, p 393, May 1966.Google Scholar
10. Makofski, R. A., and Menkick, G. F. Investigation of vertical drag and periodic airloads acting on flat plates in a rotor slipstream, NASA TN 3900, 1956.Google Scholar