Observation of the Effect of Swirl on Flame Propagation and the Derived Heat Release and Mass Burning Rates 871175
A high speed research engine has optical access to over 80% of the combustion chamber volume through a piston with a quartz window. The engine has been used to study the effect of swirl on the spark-ignited combustion by means of high speed photography and analysis of combustion-time data. Results over the speed, swirl and mixture strength range show the flame travel derived from the pressure to agree with the measured flame travel to within 3% on average. Turbulent to laminar flame speed ratios as high as 45 occur under high swirl conditions. However it was not possible to find a predictive model which could explain the turbulent flame speed in terms of engine design variables.
M. Ahary, H.C. Watson, E.E. Milkins
University of Melbourne
4th International Pacific Conference on Automotive Engineering
Proceedings of the Fourth International Pacific Conference on Automotive Engineering-P-212