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A note on the pressure drag of aforward-swept-wing-plate junction

Published online by Cambridge University Press:  04 July 2016

A. D. Arnott ,
L. Bernstein  and
D. G. Petty
A. D. Arnott
Affiliation:
Department of Engineering Queen Mary & Westfield College University of London UK
L. Bernstein
Affiliation:
Department of Engineering Queen Mary & Westfield College University of London UK
D. G. Petty
Affiliation:
Department of Engineering Queen Mary & Westfield College University of London UK
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Summary

The forces due to normal pressure have been measured inthe region of the junction between a rear-loadedwing swept forward at 28°, and a flat plate on whicha turbulent boundary layer had developed. TheReynolds number was 1·03 × 106, based onthe streamwise wing-chord of 500 mm. At lowincidences, 0° < α ≤ 6°, thelocal pressure drag coefficients were found to benegativeaway from the junction,and the interaction with the junction was found tobe favourable;that is the pressuredrag coefficient became more negative as thejunction was approached. At α = −3° the pressuredrag coefficient changed from a positive value awayfrom the junction to a negative value close to theplate. These results contrast with those for aswept-back wing-plate interaction, which has beenreported as being unfavourable so far as thepressure drag was concerned. At 6° incidence, theinteraction remained favourable but there wasevidence of root stall beginning. At an incidence of9°, root stall was much more marked and the positivepressure drag coefficient increased as the junctionwas approached.

Information

Type
Research Article
Information
The Aeronautical Journal , Volume 100 , Issue 997 , September 1996 , pp. 281 - 284
Copyright
Copyright © Royal Aeronautical Society 1996 

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Footnotes

†

Currently at the Department of Physics andAstronomy, University of Edinburgh, UK.

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