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A note on the interpretation of mini-tuft photographs

Published online by Cambridge University Press:  04 July 2016

D. G. Mabey ,
B. L. Welsh  and
C. R. Pyne
D. G. Mabey
Affiliation:
Department of AeronauticsImperial College of Science, Technology and Medicine London, UK
B. L. Welsh
Affiliation:
High Speed and Weapons Aerodynamics Department DRA Bedford, UK
C. R. Pyne
Affiliation:
High Speed and Weapons Aerodynamics Department DRA Bedford, UK
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Abstract

Although mini-tufts are considered generally to show the surface flow direction on windswept surfaces, there is some uncertainty about their correct interpretation, particularly as three-dimensional flows approach separation. This note provides some guidance on this controversial question, based on experience with mini-tufts on wings, fins and canards in the DRA 13 ft x 9 ft low speed wind-tunnel at Bedford.

An illustration of the value of the technique is given. Mini-tuft photographs are used to identify the trailing edge condition which relates to the classification of the steady and fluctuation pressure distributions observed a swept wing with a conical, separated flow.

Type
Research Article
Information
The Aeronautical Journal , Volume 99 , Issue 985 , May 1995 , pp. 178 - 182
Copyright
Copyright © Royal Aeronautical Society 1995 

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References

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