Numerical studies and validation of combustor and annular isolator interactions of hydrocarbon based axisymmetric dual combustion ramjet

Rao, M. Raghavendra; Rao, G. Amba Prasad; Charyulu, B.V.N.; Singh, Harmeet

doi:10.1016/j.ast.2020.106185

Cited by 17 publications

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Waltrup [7],explored the performance optimization design of the dual-combustion chamber ramjet engine from the point of view of the missile as a whole; Tan et al [8] investigated the flow field structure and performance of a full-size dual-combustion chamber ramjet engine through directconnected experiments and numerical simulations, and the computational results showed that the combustion efficiency at the exit reached a high level, and the dual-combustion chamber engine was obtained to have a high performance at Mach 4 and an altitude of 17km state; Raghavendra [9]investigated the flow field characteristics of the DCR combustion chamber through numerical simulation, and compared the simulation results with the test to analyze the errors of the inlet starting position, pressure and other parameters, and to further analyze the influence of the equivalence ratio on the operating condition.…”

Section: Introductionmentioning

confidence: 99%

Effect of different particle sizes on combustion characteristics of DCR engines

Zhao,

Wei,

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The ramjet engine has undergone rapid development in recent decades, and the dual combustion chamber ramjet (DCR) engine was proposed in the last century. Boron, with its high volumetric and gravimetric heating values, is one of the most attractive fuel additives for ramjet engines. However, due to the problem of low combustion efficiency, boron is difficult to achieve high efficiency combustion in practical applications. In order to investigate the combustion characteristics of boron-containing gas solid phase components in DCR engines, the Realizable k-ε model, finite rate/vortex dissipation model and boron particle King model ignition combustion calculation program were written. A three-dimensional full-scale two-phase flow numerical simulation was carried out in the combustion chamber of the DCR engine to calculate the effects of different particle sizes on the combustion characteristics. Through the analysis of the simulation results, the particle size affects the ignition time of boron particles and is positively correlated with the combustion efficiency, but with a non-linear growth. A smaller particle size can promote the ignition of boron particles, improve the solid phase combustion efficiency and achieve efficient combustion.

show abstract

Section: Introductionmentioning

confidence: 99%