Experimental and Computational Study of Flow Interactions in a Generic Scramjet Inlet-Isolator

Idris, Azam Che; Saad, Mohd Rashdan; Zare‐Behtash, Hossein; Kontis, Konstantinos

doi:10.1007/978-3-319-16838-8_30

Cited by 1 publication

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“…The heat transfer pattern from the IR map corresponded to the internal shock structures observed by schlieren images. Recently, Che Idris et al [ 22 , 23 ] have applied PSP on the internal isolator surface, and the pressure profile showed that the spatial gap between the closely positioned pressure transducer could contain vital flow information.…”

Section: Introductionmentioning

confidence: 99%

Luminescent Measurement Systems for the Investigation of a Scramjet Inlet-Isolator

Idris

Saad

Zare‐Behtash

et al. 2014

Sensors

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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.

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Section: Introductionmentioning

confidence: 99%