Variation of flame area with time (Qair = 1 092 SLM, Φ = 0.845) (IMAGE)
Caption
The ignition process is defined as five stages: stage I represents the kernel generation stage, stage II represents the kernel propagation stage, stage III represents the flame residence stage, stage IV represents the flame growth stage, and stage V represents the stable combustion stage. The entire ignition process for the SI system consists of all of the five stages. The prolonged kernel duration, the larger energy, and the high penetration depth enhanced the ignition process. The flame residence stage as observed in traditional SI systems cannot be found during the LPWPI ignition process. The simplified four-stage process includes kernel generation, kernel propagation, flame growth, and stable combustion stage; thus facilitating the easier achievement of ignition compared to the traditional SI system.
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Chinese Journal of Aeronautics
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