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Combustion Observation and Simulation of LPG Lean Burn Engine
Published October 20, 1998 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
For a better understanding of combustion phenomenon for LPG (liquefied petroleum gas) at lean burn condition, the flame propagation was observed in a window equipped with a test engine. Air/fuel and swirl ratio were varied to investigate these effects on combustion characteristics. The processed images of flame propagation revealed: flame front radius, expanding flame speed, bulk motion of burned gas, and rotational velocity as a function of time. It was also observed that the high swirl enhanced the initial combustion effectively and reduced cyclic fluctuation. Computational results by this work predicted qualitative trends of flame propagation in terms of temperature distribution and flame shape.