Characteristics and mixing enhancement of a self-throttling system in a supersonic flow with transverse injections

BIAN, Yifan, ZHAO, Majie, LI, Qinling and YE, Taohong (2018). Characteristics and mixing enhancement of a self-throttling system in a supersonic flow with transverse injections. International Journal of Hydrogen Energy, 43 (29), 13550-13562.

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A three-dimensional self-throttling system is proposed in a scramjet combustor with transverse fuel jet, and investigated by Reynolds-averaged Navier-Stokes (RANS) simulations with the k-ω SST turbulence model. Numerical validation has been carried out against experiment and LES results. The effects of the jet-to-cross-flow momentum flux ratio and the throttling angle on mixing performance, fuel jet penetration depth and total pressure losses are all addressed. Through the proposed throttling system, the higher pressure upstream of the transverse fuel injection can drive part of the low momentum mainstream air into the downstream lower pressure region. The flow structures and the interactions between the shock waves and boundary layer are significantly changed to improve the mixing performance. The enhancement of mixing efficiency in the self-throttling system is closely related to the magnitude of the jet to crossflow momentum flux ratio, and a smaller throttling angle is found to further improve the mixing. On the other hand, the self-throttling system has a good performance in reducing the total pressure losses.

Item Type: Article
Departments - Does NOT include content added after October 2018: Faculty of Science, Technology and Arts > Department of Engineering and Mathematics
Identification Number:
Page Range: 13550-13562
Depositing User: Jill Hazard
Date Deposited: 11 Jul 2018 11:00
Last Modified: 18 Mar 2021 05:08

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