The Implication of Injection Locations in an Axisymmetric Cavity-Based Scramjet Combustor

Naresh Relangi, Antonella Ingenito and Suppandipillai Jeyakumar
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Naresh Relangi: School of Aerospace Engineering, University of Rome “La Sapienza”, 00138 Rome, Italy
Antonella Ingenito: School of Aerospace Engineering, University of Rome “La Sapienza”, 00138 Rome, Italy
Suppandipillai Jeyakumar: Aeronautical Engineering, Kalasalingam Academy of Research and Education, Krishnankoil 626126, India

Energies, 2021, vol. 14, issue 9, 1-13

Abstract: This paper presents the effect of cavity-based injection in an axisymmetric supersonic combustor using numerical investigation. An axisymmetric cavity-based angled and transverse injections in a circular scramjet combustor are studied. A three-dimensional Reynolds-averaged Navier–Stokes (RANS) equation along with the k-ω shear-stress transport (SST) turbulence model and species transport equations are considered for the reacting flow studies. The numerical results of the non-reacting flow studies are validated with the available experimental data and are in good agreement with it. The performance of the injection system is analyzed based on the parameters like wall pressures, combustion efficiency, and total pressure loss of the scramjet combustor. The transverse injection upstream of the cavity and at the bottom wall of the cavity in a supersonic flow field creates a strong shock train in the cavity region that enhances complete combustion of hydrogen-air in the cavity region compared to the cavity fore wall injection schemes. Eventually, the shock train in the flow field enhances the total pressure loss across the combustor. However, a marginal variation in the total pressure loss is observed between the injection schemes.

Keywords: scramjet engine; axisymmetric cavity; transverse injection; computational fluid dynamics; combustion efficiency; total pressure loss (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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