Journal
FUEL
Volume 243, Issue -, Pages 590-602Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2019.01.162
Keywords
Surrogate fuel; Commercial diesel; Supercritical injection; Fuel properties; Critical point
Categories
Funding
- National Natural Science Foundation of China [51425602, 91641202]
- Natural Science Foundation of Shanghai, China [18ZR1418700]
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The supercritical diesel combustion concept is expected to increase the engine efficiency and reduce the harmful emissions. The investigations of diesel trans-critical and supercritical injections are the basis to understand this new diesel combustion concept. In order to numerically study the trans/supercritical injection characteristics of commercial diesel, the critical temperature of real commercial diesel was experimentally measured and the method to calculate the critical point of multi-component mixture was verified. A six-component surrogate of commercial diesel was formulated by a model-based surrogate formulation method. The comparisons between the predicted properties of six-component surrogate and the measured data of real commercial diesel were conducted. The results show that the surrogate can emulate many temperature-independent properties (cetane number, lower heating value, critical temperature and distillation temperature) and the temperature-dependent properties (density, viscosity, surface tension and thermal conductivity) with extreme small deviation. These properties have significant effect on sub/trans/supercritical injections of the commercial diesel. In addition, the surrogate was applied to simulate the diesel trans-critical injection with the continuous Euler method. The predicted liquid and vapor penetration have excellent agreement with the measured values.
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