Journal of Computational & Applied Research in Mechanical Engineering (JCARME)

Document Type : Research Paper

Authors

Department of Mechanical Engineering, Ayatollah Boroujerdi University, Borujerd, P.O. Box: 69199-69411, Iran

https://doi.org/10.22061/jcarme.2019.5430.1675

Abstract

In this computational research, the separate and simultaneous impacts of diesel direct injection timing, fuel spraying cone angle, and hydrogen gas addition on combustion characteristics, output emissions, and performance in a single-cylinder direct injection diesel engine was studied. In order to conduct the simulations, valid and reliable models for combustion, break-up, and for turbulence was used. The effects of fifteen fuel injection strategies based on characteristics such as time of fuel spraying (-15, -10 CA BTDC, and TDC) and nozzle cone angle (105, 115, 125, 145, and 160 degrees) under neat diesel combustion and diesel-hydrogen combustion engine operations conditions were explored. The obtained results indicated that the addition of H2 due to significant heating value has increased indicated power and improved indicated specific energy consumption at the expense of NOx emissions but considerably decreased CO and soot emissions simultaneously. By advancing injection timing, maximum pressure peak point, maximum temperature peak point, and maximum heat release rate peak point have increased and caused lower indicated specific energy consumption. However, using a wide spray angle (e.g., 160 cone degrees), resulted in lower indicated power and higher indicated specific energy consumption due to more fuel could spray in regions with lower oxygen concentrations compared to baseline operation case.

Graphical Abstract

Keywords

dor

20.1001.1.22287922.2020.10.1.5.0

Main Subjects

Internal Combustion Engine

References

[1] D. Agarwal, S. Singh and A. Agarwal, "Effect of Exhaust Gas Recirculation (EGR) on performance, emissions, deposits and durability of a constant speed compression ignition engine", Applied Energy, vol. 88, no. 8, pp. 2900-2907, (2011).

[2] J. Gao, S. Park, Y. Wang, R. Reitz, S. Moon and K. Nishida, "Simulation and analysis of group-hole nozzle sprays using a gas jet superposition model", Fuel, vol. 89, no. 12, pp. 3758-3772, (2010).

[3] E. A. EI Shenawy, M. Elkelawy, H. A. E. Bastawissi, H. Panchal, & M. M. Shams, "Comparative study of the combustion, performance, and emission characteristics of a direct injection diesel engine with a partially premixed lean charge compression ignition diesel engines", Fuel, Vol. 249, no. 1, pp. 277-285, (2019).

[4] J. K. Yeom, S. H. Jung, & J. H. Yoon, "An experimental study on the application of oxygenated fuel to diesel engines", Fuel, Vol. 248, no. 15, pp. 262-277, (2019).

[5] M. R. N. El-Din, M. R. Noor, M. S. Gad, & M. Keshawy, "Performance and exhaust emissions of a diesel engine using diesel nanoemulsions as alternative fuels", Egyptian Journal of Petroleum, Vol. 28, no. 2, pp. 197-204, (2019).

[6] J. E, X. Zhao, L. Qiu, K. Wei, Z. Zhang, Y. Deng, D. Han, & G. Liu, "Experimental investigation on performance and economy characteristics of a diesel engine with variable nozzle turbocharger and its application in urban bus", Energy Conversion and Management, Vol. 193, no. 1, pp. 149-161, (2019).

[7] F. M. Hossain, M. N. Nabi, & R. J. Brown, "Investigation of diesel engine performance and exhaust emissions of microalgae fuel components in a turbocharged diesel engine", Energy conversion and management, Vol. 186, no. 15, pp. 220-228, (2019).

[8] R. K. Rai, & R. R. Sahoo, "Effective power and effective power density analysis for water in diesel emulsion as fuel in diesel engine performance", Energy, Vol. 180, no. 1, pp. 893-902, (2019).

[9] M. Pan, R. Huang, J. Liao, C. Jia, X. Zhou, H. Huang, & X. Huang, "Experimental study of the spray, combustion, and emission performance of a diesel engine with high n-pentanol blending ratios", Energy Conversion and Management, Vol. 194, no. 1, pp. 1-10, (2019).

[10] M. Nour, A. M. A. Attia, & S. A. Nada, "Combustion, performance and emission analysis of diesel engine fuelled by higher alcohols (butanol, octanol and heptanol)/diesel blends", Energy Conversion and Management, Vol. 185, no. 10, pp. 313-329, (2019).

[11] J. Benajes, S. Molina, A. García and J. Monsalve-Serrano, "Effects of direct injection timing and blending ratio on RCCI combustion with different low reactivity fuels", Energy Conversion and Management, vol. 99, pp. 193-209, (2015).

[12] L. Zhu, Y. Qian, X. Wang and X. Lu, "Effects of direct injection timing and premixed ratio on combustion and emissions characteristics of RCCI (Reactivity Controlled Compression Ignition) with N-heptane/gasoline-like fuels", Energy, vol. 93, pp. 383-392, (2015).

[13] J. Zhou, C. Cheung, W. Zhao and C. Leung, "Diesel–hydrogen dual-fuel combustion and its impact on unregulated gaseous emissions and particulate emissions under different engine loads and engine speeds", Energy, vol. 94, pp. 110-123, (2016).

[14] F. Christodoulou and A. Megaritis, "Experimental investigation of the effects of simultaneous hydrogen and nitrogen addition on the emissions and combustion of a diesel engine", International Journal of Hydrogen Energy, vol. 39, no. 6, pp. 2692-2702, (2014).

[15] F. Christodoulou and A. Megaritis, "Experimental investigation of the effects of separate hydrogen and nitrogen addition on the emissions and combustion of a diesel engine", International Journal of Hydrogen Energy, vol. 38, no. 24, pp. 10126-10140, (2013).

[16] Y. Karagöz, İ. Güler, T. Sandalcı, L. Yüksek and A. Dalkılıç, "Effect of hydrogen enrichment on combustion characteristics, emissions and performance of a diesel engine", International Journal of Hydrogen Energy, vol. 41, no. 1, pp. 656-665, (2016).

[17] ICE Physics & Chemistry, 2014. AVL FIRE user Manual v.2014. 1, (2014).

[18] J. Hélie and A. Trouvé, “A modified coherent flame model to describe turbulent flame propagation in mixtures with variable composition,” Proceedings of the Combustion Institute, vol. 28, no. 1, pp. 193–201, (2000).

[19] O. Colin and A. Benkenida, “The 3-Zones Extended Coherent Flame Model (Ecfm3z) for Computing Premixed/Diffusion Combustion,” Oil & Gas Science and Technology, vol. 59, no. 6, pp. 593–609, (2004).

[20] M. Popovac and K. Hanjalic, “Compound Wall Treatment for RANS Computation of Complex Turbulent Flows and Heat Transfer,” Flow, Turbulence and Combustion, vol. 78, no. 2, pp. 177–202, (2007).

[21] J. K., Dukowicz, Quasi-Steady Droplet Change in the Presence of Convection, Informal Report Los Alamos Scientific Laboratory, Los Alamos. N. Mex., USA, LA7997-MS, (1979).

[22] Sarre, V. K.. Ch., Tatschl, R., Spray Modelling/Atomisation–Current Status of Break-Up Models. In Proc. of ImechE Seminar on Turbulent Combustion of Gaseous and Liquids, Lincoln, United Kingdom, (1998).

[23] P. A. N. Nordin, “Complex chemistry modeling of diesel spray combustion,” dissertation, (2001).

[24] J. Naber and R. D. Reitz, “Modeling Engine Spray/Wall Impingement,” SAE Technical Paper Series, (1988).

[25] M. J. Tess, C.-W. Lee, and R. D. Reitz, “Diesel Engine Size Scaling at Medium Load without EGR,” SAE International Journal of Engines, vol. 4, no. 1, pp. 1993–2009, (2011).

[26] F. Christodoulou and T. Megaritis, “Hydrogen, nitrogen and syngas enriched diesel combustion,” dissertation, (2014).

[27] J. I. Ramos, Internal combustion engine modeling. New York, NY: Hemisphere, (1989).

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