Comparison of the Performance of Different Mechanisms on Soot Generation of Low-Speed Two-Stroke Marine Engines

Abstract

The chemical mechanism is directly related to the combustion, so it has a great influence on the generation of soot. The aim of this article is to compare the performance of three different mechanisms on soot generation of marine diesel engine (6S35ME-B9) and find out which mechanism has the best performance. The results show that for the influence of soot generation, the difference between the n-tetradecane mechanism and the n-tetradecane-toluene mechanism is not significant, but there are some significant differences compared with the n-heptane mechanism. When the exhaust valve opens, the number densities of soot produced by using n-heptane mechanism is twenty times that of the n-tetradecane and n-tetradecane-toluene mechanism. But the mass of soot produced by using n-tetradecane and n-tetradecane-toluene mechanism is about three times that of the n-heptane mechanism. Then the average particle mass and size of soot produced by using n-tetradecane and n-tetradecane-toluene mechanism is much more than that of the n-heptane mechanism. Ultimately the n-tetradecane mechanism is more suitable for soot simulation of low-speed two-stroke marine engines.