|

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  

DOI: 10.18698/0236-3941-2015-6-82-95

 
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.

References

[1] Grekhov L.V., Ivashchenko N.A., Markov V.A. Toplivnaya apparatura i sistemy upravleniya dizeley [Fuel Equipment and Diesel Engine Control Systems]. Moscow, Legion-Avtodata Publ., 2005. 344 p.

[2] Markov V.A., Bashirov R.M., Gabitov I.I. Toksichnost’ otrabotavshikh gazov dizeley [Toxicity of the Diesel Engine Exhaust Gases]. Moscow, MGTU im. N.E. Baumana Publ., 2002. 376 p.

[3] Janhunen T.T. HCCI-Combustion in the Z Engine. SAE Technical Paper Series, 2012, no. 2012-01-1573, pp. 1-16.

[4] Tiainen J., Saarinen A., Gronlund T., Larmi M. Novel Two-Stroke Engine Concept, Feasibility Study. SAE Technical Paper Series, 2003, no. 2003-01-3211, pp. 1-15.

[5] Flowers D., Aceves S., Smith R. et al. HCCI in a CRF Engine: Experiments and Detailed Kinetic Modeling. SAE Technical Paper Series, 2000, no. 2000-01-0328, pp. 1-13.

[6] Flowers D., Aceves S., Smith R. et al. HCCI in a CRF Engine: Experiments and Detailed Kinetic Modeling. SAE Technical Paper Series, 2000, no. 2000-01-0328, pp. 1-13.

[7] Zheng Z., Yao M., Chen Z. et al. Experimental Study on HCCI Combustion of Dimethyl Ether (DME). Methanol Dual-Fuel. SAE Technical Paper Series, 2004, no. 2004-01-2993, pp. 1-9.

[8] Gusakov S.V., Makhmud Mokhamed El’ Gobashi El’ Khagar. Modeling Workflow of Piston Engine with Spontaneous Ignition of Homogeneous Charge. Izvest. Tul’skogo gos. univ. Avtomobil’nyy transport [Bull. of the Tula State Univ.], 2003, no. 7, pp. 173-179 (in Russ.).

[9] Markov V.A., Devyanin S.N., Mal’chuk V.I. Vpryskivanie i raspylivanie topliva v dizelyakh [Fuel Injection and Atomization in Diesel Engines]. Moscow, MGTU im. N.E. Baumana Publ., 2007. 360 p.

[10] Markov V.A., Stremyakov A.V., Akimov V.S., Shumovskiy V.A. Computational analysis for fuel supply process in a diesel engine equipped with sprayers with different shapes of fuel channels. Gruzovik [Truck: transportation complex, special-purpose], 2011, no. 3, pp. 13-17 (in Russ.).

[11] Araki M., Umino T., Obokata T., Ishima T. et al. Effects of Compression Ratio on Characteristics of PCCI Diesel Combustion with a Hollow Cone Spray. SAE Technical Paper Series, 2005, no. 2005-01-2130, pp. 1-8.

[12] Obokata T., Long W., Ishima T. PDA and LDA Measurements of Large Angle Hollow Cone Spray Proposed for Hot-Premixed Combustion Type Diesel Engine. SAE Technical Paper Series, 1996, no. 960772, pp. 1-10.

[13] Yang X., Takamoto Y., Okajima A., Obokata T. et al. Comparison of Computed and Measured High-Pressure Conical Diesel Sprays. SAE Technical Paper Series, 2000, no. 2000-01-0951, pp. 1-9.

[14] Obokata I., Shiga E., Matsuda M., Long YL. Characteristics of Premixed Combustion Type Diesel Engine Using Hollow Cone Spray. ASME, 2001, no. 2001-ICE-419, pp. 1-10.

[15] Ishima T., Matsuda T., Shiga S., Araki M. et al. Characteristics of HCCI Diesel Combustion Operated with a Hollow Cone Spray. SAE Technical Paper Series, 2003, no. 2003-01-1823, pp. 1-8.

[16] Ming J., Maozhao X., Hong L., Wei-Haur L., Tianyou W. Numerical Simulation of Cavitation in the Conical-Spray Nozzle for Diesel Premixed Charge Compression Ignition Engines. Fuel, 2011, vol. 90, pp. 2652-2661.

[17] Jia M., Hou D., Li J., Xie M. et al. A Micro-Variable Circular Orifice Fuel Injector for HCCI-Conventional Engine Combustion - Part I. Numerical Simulation of Cavitation. SAE Technical Paper Series, 2007, no. 2007-01-0249, pp. 1-15.

[18] Schmid A. Experimental characterization of the two phase flow of a modern, piezo activated hollow cone injector. DISS. ETH, 2012, no. 20852, pp. 1-16.

[19] Kuleshov A.S., Akimov V.S., Janhunen T. Numerical Investigations of Cavitation in the Multijet Nozzle of the Engine with Homogeneous Charge Compression Ignition. Tez. dokl. XIX shk. seminara molodykh uchenykh i spetsialistov pod rukovodstvom akademika RAN A.I. Leont’eva [The Problems of Gas Dynamics and Heat and Mass Transfer in Power Plants: Abstracts, XIX Sch.. Seminar of Young Scientists and Specialists under the Leadership of Academician A.I. Leontyev.], 2013, pp. 125-126 (in Russ.).