| GASEOUS EMISSIONS AND PARTICLE MICROSTRUCTURE CHARACTERISTICS OF PODE/DIESEL BLEND FUEL |
| Wanying Gao1, Junheng Liu1, Ping Sun1, Chen Yang1, Jia Fang2 |
1Jiangsu University
2Xihua University |
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| ABSTRACT |
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Polyoxymethylene dimethyl ethers (PODE) has good application prospects as an alternative to diesel fuel with
a great potential to achieve clean combustion on diesel engines. In current study, the effects of PODE/diesel blends with PODE
volume fraction at 10 %, 20 % and 30 % on performance and emission characteristics are investigated on a common-rail diesel
engine under different engine loads. The particle size distribution and microstructure characteristics of the combustion
particles are also analized. Results show that the PODE/diesel blends have shorter ignition delay, higher in-cylinder maximum
burst pressure and advanced heat release. The brake thermal efficiency increases slightly with the increment of PODE
blending ratio. There is a simultaneous improvement in CO, HC and soot emissions when fueling blend fuels. A more obvious
shifting tendency toward the direction of small particle size can be found in number concentration, mass density and mass
cumulative distribution of particles with increment of PODE. The microstructure of the blend fuels combustion particles is
mainly in the form of agglomerates. Compared with diesel fuel, combustion particles of blend fuels have bigger layer spacing
and microcrystalline curvature as well as smaller crystallite size, also the box dimension of the particles and the degree of
agglomeration increase. |
| Key Words:
Common-rail diesel engine, PODE, Performance and emission characteristics, Particle size distribution,
Microstructure |
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Corresponding Author.
Junheng Liu , Email. 
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