Computational analysis of injection and spraying in HCCI engine
Authors: Akimov V.S., Kuleshov A.S., Markov V.An., Yakovchuk A.Yu., Janhunen T.T. | Published: 21.12.2015 |
Published in issue: #6(105)/2015 | |
Category: Power Engineering | Chapter: Heat Engines | |
Keywords: diesel engine, HCCI engine, diesel fuel, fuel injection process, exhaust gases toxicity characteristics |
The paper considers exhaust gases emission indices as the most important characteristics of internal combustion engines in the current engine building industry. It presents a new engine operating principle, Z-engine, which combines the main advantages of both two-stroke and four-stroke engines. The paper contains descriptions of both the Z-engine gas exchange characteristics and its indicator diagram. The authors used the Diesel-RK software package for simulating the operational process of the two-cylinder Z-engine with a spark ignition of the fuel-air mixture. The article shows that this type of engine allows homogenous air-fuel mixing - the HCCI process, as well as it highlights the necessity of simulating the processes of fuel injection and spaying. The ANSYS Fluent 14 software package allows simulating both a fuel flow through the air-gas channel of the delay nozzle used in the Z-engine and a formation of fuel jets with drop evaporation inside the cylinder. The article confirms that the analyzed engine provides the homogenous air-fuel mixing. The authors specify the arrangements necessary to implement the HCCI process in the Z-engine.
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