Optical studies of spray development and combustion of water-in-diesel emulsion and microemulsion fuels
Journal article, 2010

Physical properties, spray behaviour and combustion characteristics of a water-in-diesel emulsion, a water-in-diesel microemulsion and a conventional diesel fuel were investigated. The size of the drops, in the water-containing fuels, was measured by NMR diffusometry. Spray development and combustion were studied by optical methods in an optically accessed combustion vessel at conditions similar to those in a diesel engine. High speed shadowgraphs were employed to measure break-up, droplets penetration, vapour penetration and start of combustion. Combustion duration, flame temperature and relative soot concentration were determined by emission-based methods. Differences in spray behaviour suggest an enhanced atomisation for the water-containing fuels compared to regular diesel fuel. Moreover, reduced soot concentrations and flame temperature with increased combustion duration were noticed for the water-in-diesel fuels than for the regular diesel fuel.

Spray behaviour

Water-in-diesel emulsion

Spray combustion


Anna Lif

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Raul Lima Ochoterena

Chalmers, Applied Mechanics, Combustion

Magnus Nydén

SuMo Biomaterials

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Sven B Andersson

Chalmers, Applied Mechanics, Combustion

Ingemar Denbratt

Chalmers, Applied Mechanics, Combustion


0016-2361 (ISSN)

Vol. 89 1 122-132

Subject Categories

Physical Chemistry

Energy Engineering



More information

Latest update