Numerical simulation of detonation re-initiation in a 90° bifurcated channel filled with n-heptane/air mixture

Jiang, Chao; Pan, Jianfeng; Li, Jianxing; Shi, Xingyu; Quaye, Evans K.

doi:10.1016/j.actaastro.2022.10.054

Cited by 5 publications

(1 citation statement)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, we rely on the engine fuel supply system to inject high-pressure fuel directly into the detonation tube so that the fuel is rapidly broken and atomized into tiny particles (particle size < 8.5 µm), which substantially simplifies the multiphysical process of liquid fuel in the volatilization process. For numerical simulation, Energies 2024, 17, 2466 3 of 16 most studies have utilized two-dimensional (2D) simulation to reduce the computation time [45][46][47]; however, in the study of two-phase detonation, the mixing, atomization, and evaporation process of liquid fuel is the key to the formation of combustible mixtures. Computational fluid dynamics (CFD) can simulate the whole process of fuel from injection to mixing with the oxidant, which can provide a comprehensive understanding of how the three-dimensional (3D) detonation structure evolves so as to better optimize the detonation and combustion process.…”

Section: Introductionmentioning

confidence: 99%

Combustion Mechanism of Gasoline Detonation Tube and Coupling of Engine Turbocharging Cycle

Huang,

Wang,

Shi

et al. 2024

Energies

View full text Add to dashboard Cite

Traditional exhaust-gas turbocharging exhibits hysteresis under variable working conditions. To achieve rapid-intake supercharging, this study investigates the synergistic coupling process between the detonation and diesel cycles using gasoline as fuel. A numerical simulation model is constructed to analyze the detonation characteristics of a pulse-detonation combustor (PDC), followed by experimental verification. The comprehensive process of the flame’s deflagration-to-detonation transition (DDT) and the formation of the detonation wave are discussed in detail. The airflow velocity, DDT time, and peak pressure of detonation tubes with five different blockage ratios (BR) are analyzed, with the results imported into a one-dimensional GT-POWER engine model. The results indicate that the generation of detonation waves is influenced by flame and compression wave interactions. Increasing the airflow does not shorten the DDT time, whereas increasing the BR causes the DDT time to decrease and then increase. Large BRs affect the initiation speed of detonation in the tube, while small BRs impact the DDT distance and peak pressure. Upon connection to the PDC, the transient response rate of the engine is slightly improved. These results can provide useful guidance for improving the transient response characteristics of engines.

show abstract

Section: Introductionmentioning

confidence: 99%