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The influence of roughness trips upon boundary-layer transition. Part 1†: Characteristics of wire trips

Published online by Cambridge University Press:  04 July 2016

J. C. Gibbings ,
O. T. Goksel  and
D. J. Hall
J. C. Gibbings
Affiliation:
Department of Mechanical Engineering, The University of Liverpool.
O. T. Goksel
Affiliation:
Middle East Technical University, Ganziantep, Turkey.
D. J. Hall
Affiliation:
Warren Springs Laboratory, Letchworth.
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Summary

This report gives extended data for the flow past roughness trips to provoke boundary-layer transition. This first Part reports work on wire trips giving data for the forces on the wire, the positions of recovery and effective origin of the turbulent layer, the length of the separation bubble and the beginning and end of transition. Parts 2 and 3 describe similar work on spherical roughness trips, used singly and in rows, looking in more detail at the spanwise variations in the downstream boundary-layer.

Type
Research Article
Information
The Aeronautical Journal , Volume 90 , Issue 898 , October 1986 , pp. 289 - 301
Copyright
Copyright © Royal Aeronautical Society 1986 

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Footnotes

†

Parts II and III will appear in the November and December issues respectively.

References

Note on page 290 †† A separate study of this influence of trips upon separation has been completed and will be reported.

Note on page 290 ††† References are given in Part 3, which will appear in the December 1986 issue.

Note on page 300 * This might not be so if the plate effectively acts as a splitter plate.