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Upstream influence on turbulent jet flows from cruciform nozzles

Published online by Cambridge University Press:  04 July 2016

W. R Quinn  and
G. F Marsters
W. R Quinn
Affiliation:
St Francis Xavier University, Antigonish, Nova Scotia, Canada
G. F Marsters
Affiliation:
Airworthiness Branch, Federal Ministry of Transport, Canada
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Extract

The mixing of single or multiple jets is relevant in several engineering applications ranging from flame stabilisation in combustion to high lift devices for V/STOL aircraft. In some of these applications, expeditious manufacturing and ease of installation may dictate the use of sharp-edged slots in preference to nozzles with contoured upstream shaping.

It has been suggested that cruciform nozzle exit shapes may be suitable for improving mixing and thus thrust augmentation in STOL aircraft. The effects of nozzle geometry on the performance of an axisymmetric thrust augmentor have been investigated experimentally and a very slight improvement in the performance of the axisymmetric thrust augmentor was observed when cruciform nozzles were used after the tests had been performed with circular nozzles.

Type
Research Article
Information
The Aeronautical Journal , Volume 89 , Issue 882 , February 1985 , pp. 55 - 58
Copyright
Copyright © Royal Aeronautical Society 1985 

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References

1. Whittley, D. C. Ejector-powered lift systems for V/STOL aircraft. Canadian Aeronautics and Space Journal, May 1974.20, 179.Google Scholar
2. Marsters, G. F. and Montasser, W. The effects of nozzle geometry on the performance of an axisymmetric thrust augmentor. Proceedings of the 1978 Heat Transfer and Fluid Mechanics Institute, Stanford University. 1978,71.Google Scholar
3. Marsters, G. F. Mean velocity and turbulence measurements in flowsof cruciform jets.Proceedings of the 5th Biennial Symposium on Turbulence,University of Rolla, Missouri, October 1977.Google Scholar
4. Bradshaw, P. Review-Complex turbulent flows. Transactions of the ASME, Journal of Fluids Engineering, June 1975.97,146.Google Scholar
5. Hussain, A. K. M. F. and Clark, A. Ray. Upstream influence on the near field of a plane turbulent jet. The Physics of Fluids, September 1977,20,1416.Google Scholar
6. Quinn, W. R. Turbulent free jet flow from a sharp-edged rectangular slot. PhD Thesis, Queen's University at Kingston, 1984.Google Scholar
7. Hussain, A. K. M. F. Coherent Structures — reality and myth. The Physics of Fluids, October 1983. 26,2816.Google Scholar
8. Perkins, H. J. The formation of streamwise vorticity in turbulent flow. Journal of Fluid Mechanics, 1970,44,721.Google Scholar
9. Prandtl, L. Essentials of Fluid Dynamics. Blackie, 1952.Google Scholar
10. Quinn, W. R., Pollard, A. and Marsters, G. F. On saddle-backed velocity distributions in a three-dimensional turbulent free jet. AIAA Paper 83-1677,16th Fluid and Plasma Dynajnics Conference, Danvers, Massachusetts, July 1983.Google Scholar