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QUACC, a novel method for predicting unsteady flows — including propellers and store release

Published online by Cambridge University Press:  04 July 2016

D. L. Hunt ,
M. Childs  and
M. Maina
D. L. Hunt
Affiliation:
Aircraft Research Association (ARA) Bedford, UK
M. Childs
Affiliation:
Aircraft Research Association (ARA) Bedford, UK
M. Maina
Affiliation:
Aircraft Research Association (ARA) Bedford, UK
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Abstract

Aerospace designers are increasingly interested in predicting unsteady flowfields such as those associated with store release, rotating propellers etc. However, the cost of performing fully unsteady calculations is usually prohibitively expensive. In order to address this problem for unsteady flows driven by a moving surface, a novel method is presented which calculates the time derivates as an analytic function of the instantaneous flowfield. This allows an accurate solution of the unsteady flow equations to be calculated using a quasi-unsteady approach. The validity of this approach is demonstrated for a store release and a propeller test case. Possible extensions to this method for more complex unsteady flows are presented.

Type
Research Article
Information
The Aeronautical Journal , Volume 105 , Issue 1050 , August 2001 , pp. 427 - 434
Copyright
Copyright © Royal Aeronautical Society 2001 

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