Luminescent measurement systems for the investigation of a scramjet inlet-isolator

Idris, A. C., Saad, M. R., Zare-Behtash, H. and Kontis, K. (2014) Luminescent measurement systems for the investigation of a scramjet inlet-isolator. Sensors, 14(4), pp. 6606-6632. (doi:10.3390/s140406606)

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Abstract

Scramjets have become a main focus of study for many researchers, due to their application as propulsive devices in hypersonic flight. This entails a detailed understanding of the fluid mechanics involved to be able to design and operate these engines with maximum efficiency even at their off-design conditions. It is the objective of the present cold-flow investigation to study and analyse experimentally the mechanics of the fluid structures encountered within a generic scramjet inlet at M = 5. Traditionally, researchers have to rely on stream-thrust analysis, which requires the complex setup of a mass flow meter, a force balance and a heat transducer in order to measure inlet-isolator performance. Alternatively, the pitot rake could be positioned at inlet-isolator exit plane, but this method is intrusive to the flow, and the number of pitot tubes is limited by the model size constraint. Thus, this urgent need for a better flow diagnostics method is addressed in this paper. Pressure-sensitive paint (PSP) has been applied to investigate the flow characteristics on the compression ramp, isolator surface and isolator sidewall. Numerous shock-shock interactions, corner and shoulder separation regions, as well as shock trains were captured by the luminescent system. The performance of the scramjet inlet-isolator has been shown to improve when operated in a modest angle of attack.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Kontis, Professor Konstantinos and Zare-Behtash, Dr Hossein
Authors: Idris, A. C., Saad, M. R., Zare-Behtash, H., and Kontis, K.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Sensors
Publisher:MDPI
ISSN:1424-8239
ISSN (Online):1424-8220
Copyright Holders:Copyright © 2014 The Authors
First Published:First published online in Sensors 14(4):6606-6632
Publisher Policy:Reproduced under a Creative Commons License
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