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- W4221000504 abstract "Because of stringent emissions regulations, internal combustion engines using natural gas have become an important direction for the low-carbon development of the internal combustion engine industry. The combustion process of the internal combustion engines using natural gas involves the interaction between the gas jet and the flame. In this study, the process of a methane jet impinging on a methane premixed ignition flame inside a constant volume bomb was simulated by CONVERGE software, and the changes in combustion and flow within the jet impinging flame flow field were investigated. A k-value was defined by the ratio of jet velocity to laminar combustion velocity, and k is found to be inversely proportional to the maximum value of the rate of change of flame surface area A, and k is proportional to the peak value of the rate of change of turbulent kinetic energy. It was also found that the jet intensifies the initial premixed flame under three k-value operating conditions, and the OH-based change rate within the flow field increases abruptly by a factor of 4–9 after the jet is added. The process of jet impingement on the flame is divided into three stages according to the mutual position of the jet and the premixed flame surface, and the evolution of the flame structure and the combustion behavior in the flow field under different stages are analyzed in the article. It was found that the initial premixed flame induced by the jet became unstable in the second stage and a stable turbulent combustion flame was formed in the third stage. Analysis of the parameter changes at three points on the axial direction of the jet nozzle revealed that the jet disturbance at the near-nozzle end was too large to form stable combustion. Meanwhile, at the far-nozzle end, the jet disturbance formed a vortex volume suitable for combustion, and turbulent combustion was produced by the heat-induced by the flame moving toward the unburned area and the vortex volume disturbance." @default.
- W4221000504 created "2022-04-03" @default.
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- W4221000504 date "2022-08-01" @default.
- W4221000504 modified "2023-10-16" @default.
- W4221000504 title "Numerical simulation of the influence of high-pressure methane jet on the premixed ignition flame of constant volume bomb" @default.
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- W4221000504 doi "https://doi.org/10.1016/j.fuel.2022.124003" @default.
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