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PIV measurements in a twin-jet STOVL fountain flow

Published online by Cambridge University Press:  03 February 2016

P. M. Cabrita ,
A. J. Saddington  and
K. Knowles
P. M. Cabrita
Affiliation:
Department of Aerospace, Power and Sensors, Cranfield University, Shrivenham, Wiltshire, UK
A. J. Saddington
Affiliation:
Department of Aerospace, Power and Sensors, Cranfield University, Shrivenham, Wiltshire, UK
K. Knowles
Affiliation:
Department of Aerospace, Power and Sensors, Cranfield University, Shrivenham, Wiltshire, UK
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Abstract

Mean velocity and first order turbulence measurements were obtained from a three-dimensional upwash fountain flow generated by the impingement of two compressible axisymmetric turbulent jets onto a normal plane. The jet impingement area and fountain formation regions were examined with data obtained through the use of particle image velocimetry. Seven configurations with different nozzle pressure ratios were considered to ascertain the influence of jet compressibility on the fountain development. Results indicate that the mixing of the fountain is dependent on the nozzle pressure ratio, leading to an increase in the fountain spreading rate with increase in nozzle pressure ratio.

Type
Research Article
Information
The Aeronautical Journal , Volume 109 , Issue 1100 , October 2005 , pp. 439 - 449
Copyright
Copyright © Royal Aeronautical Society 2005 

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