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Rotary jet-thrust augmentors — the fallacy of Foa’s theory and the jet fan augmentor

Published online by Cambridge University Press:  04 July 2016

C. L. Bore
C. L. Bore*
Affiliation:
Formerly British Aerospace, Kingston
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Summary

The theory behind Foa’s rotary jet-thrust augmentor dates back to 1955, but there is a fundamental fallacy in it, which is proved by this note. When corrected, the augmentation value equals that of the static-jet augmentor.

The principles and theory of the jet-fan thrust augmentor are outlined. Thrust augmentation ratios of these will be around three times those of static-jet augmentors.

Type
Technical Note
Information
The Aeronautical Journal , Volume 97 , Issue 969 , November 1993 , pp. 328 - 331
Copyright
Copyright © Royal Aeronautical Society 1993 

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References

1. Foa, J.V. A new method of energy exchange between flows and some of its applications, Rensselaer Polytechnic Institute of Aerospace Engineering TR AE 550g, 1955.Google Scholar
2. Hohenemser, K.H. Flow induction by rotary jets, J Aircr, January/February 1966, 3, (1), pp 18–24.Google Scholar
3. Hohenemser, K.H. and Porter, J.L. Contribution to the theory of rotary jet flow induction, J Aircr, July/August 1966, 3, (4), pp 339–346.Google Scholar
4. Hohenemser, K.H. and McBrayer, J.D. Effects of density ratio on rotary jet flow induction, J Aircr, April 1971, 8, (4), pp 208–212.Google Scholar
5. Poll, D.I.A. Flow induction by rotating jets with particular reference to thrust augmentation, HSA FPN 238, October 1973.Google Scholar
6. Leconte, J.N. Hydraulics, p 220. McGraw Hill Books, 1926.Google Scholar
7. Bore, C.L. Non-isentropic duct flow and the general drag wake traverse, May 1993, 97, (965), pp 177–178 Google Scholar
8. Bore, C.L. Some unpublished contributions to propulsion theory, Lecture to RAeS, 11 March 1992.Google Scholar