Investigation on the optimizing range of combustion chamber configuration parameters of DSCS

An optimizing range of the main configuration parameters of double swirls combustion system (DSCS) is obtained. To analyze the influence of DS combustion, chamber configuration parameters on fuel spray and mixing by means of the fuel jet development periphery charts are obtained by the high speed photography with a modeling test device developed by authors, and to examine it by the tests on a single cylinder diesel engine. The results indicate that the mixing process can be divided into four phases. The optimizing range of the ratio of the inner chamber diameter to the cylinder bore, d₂/D, is 0.4-0.7; and the outer chamber diameter, d₁, the height of the circular ridge to the piston top face, h₁, the radius of outer/inner chamber circle, R₁, R₂, the max. depth of outer/inner chamber bowl, H₁, H₂, etc. are also important.