Theoretical Study on Spray Design for Smaller-bore-size Diesel Engines (Third Report)

- Soot Reduction by Applying ‘Geometrical Similarity of Fuel Spray’ -

Abstract

Previous reports show that smaller-hole nozzle diameter and larger number of holes or highly compressed air can suppress soot emission in smaller-bore size engine adopted by the size similarity theory. In this report, other approach has been applied to achieve highly dispersed spray which was induced by the enlarged spray cone angle adopting redesigned nozzle-hole shape. The results show that ‘geometrical similarity of fuel spray’ can be obtained, which keeps soot emission at the same level while bore size is reduced.