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Visualization Experiment of Effect of Simulated Altitudes on Diesel Combustion
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School of Automotive Studies, Tongji University, Shanghai 201804, China

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TK421

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    Abstract:

    Experiments of diesel flame propagation and soot formation characteristics at different simulated altitudes were conducted in a constant volume combustion vessel reproducing diesel-like thermodynamic conditions of a heavy-duty diesel engine. The results show that with the increase of altitude from 0 m to 4 500 m, the ignition delay becomes longer from 0.67 ms to 1.04 ms and the ignition distance from 22.09 mm to 37.03 mm. Besides, the lift-off length increases from 23.1 mm to 34.5 mm, making the stoichiometric air ratio increase from 12.0 % to 14.0 %. Moreover, the peak value of spatially integrated natural luminosity decreases, showing the same trend of variation with the stoichiometric air ratio. Furthermore, the time integrated natural luminosity decreases, which implies that the soot formation is reduced.

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WANG Chengguan, LOU Diming, TAN Piqiang, FANG Liang. Visualization Experiment of Effect of Simulated Altitudes on Diesel Combustion[J].同济大学学报(自然科学版),2020,48(4):552~558

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History
  • Received:June 06,2019
  • Revised:February 13,2020
  • Adopted:November 29,2019
  • Online: April 24,2020
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