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Periodic transonic flow andcontrol

Published online by Cambridge University Press:  03 February 2016

S. Raghunathan ,
J.M. Early ,
C. Tulita ,
E. Benard  and
J. Quest
S. Raghunathan
Affiliation:
School of Mechanical and Aerospace Engineering, Queens University, Belfast, UK
J.M. Early
Affiliation:
School of Mechanical and Aerospace Engineering, Queens University, Belfast, UK
C. Tulita
Affiliation:
School of Mechanical and Aerospace Engineering, Queens University, Belfast, UK
E. Benard
Affiliation:
School of Mechanical and Aerospace Engineering, Queens University, Belfast, UK
J. Quest
Affiliation:
European Transonic Windtunnel, Cologne, Germany
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Abstract

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The current understanding of periodic transonic flow isreviewed briefly. The effects of boundary-layertransition, non-adiabatic wall conditions andmodifications to the aerofoil surface geometry atthe shock interactions on periodic transonic floware discussed. Through the methods presented, it isproposed that the frequency of periodic motion canbe predicted with reasonable accuracy, but there arelimitations on the prediction of buffet boundariesassociated with periodic transonic flows. Severalmethods have been proposed by which the periodicmotion may be virtually eliminated, most relevantlyby altering the position of transition fix,contouring the aerofoils surface or adding a poroussurface and a cavity in the region of shockinteraction. In addition, it has been shown thatheat transfer can have a significant effect onbuffet.

Information

Type
Research Article
Information
The Aeronautical Journal , Volume 112 , Issue 1127 , January 2008 , pp. 1 - 16
Copyright
Copyright © Royal Aeronautical Society 2008 

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