The Impact of Pilot Diesel Injection Strategies on the Combustion and Emission Characteristics of Diesel–Natural Gas Dual-Fuel Medium-Speed Marine Engines Based on Large-Eddy Simulation
Publication: Journal of Energy Engineering
Volume 150, Issue 5
Abstract
With the tightening of emission regulations for marine engines, it has become increasingly important to explore efficient and clean combustion strategies in diesel–natural gas dual–fuel marine engines. This study, for the first time, compared and analyzed the effects of single and split injection strategies on the combustion process in a marine medium-speed dual-fuel engine with a natural gas substitution rate of 93.3%. Optimal strategies were compared for single injection [Case A: start of injection crank angle (CA) after top dead center (ATDC)] and split injection (Case B: ATDC, ATDC). The analysis of Cases A and B revealed that employing a split pilot diesel injection strategy enhances engine thermal efficiency—Case B had a 0.77% increase in efficiency compared with Case A. More importantly, the split injection strategy proved to be more effective in reducing emissions; compared with Case A, Case B had a 36.3% and 49.4% decrease in and emissions, respectively. A deeper examination of the combustion process in Case B revealed that the reactivity in specific cylinder regions was enhanced, thereby increasing the flame propagation speed in those areas. Moreover, the strategy reduced the proportion of pilot diesel diffusion combustion, leading to lower high temperatures and aiding in the reduction of formation. These findings provide a technological reference for improving energy conversion efficiency and facilitating cleaner combustion in future applications of low-carbon fuels in dual-fuel marine engines.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request (Figs. 1–20).
Acknowledgments
This work was financially supported by the National Key R&D program of China (No. 2022YFB4300700).
References
Akihama, K., Y. Takatori, K. Inagaki, S. Sasaki, and A. M. Dean. 2001. Mechanism of the smokeless rich diesel combustion by reducing temperature. Warrendale, PA: SAE International.
Amsden, A. A., P. J. O’Rourke, and T. D. Butler. 1989. KIVA-II: A computer program for chemically reactive flows with sprays, 1–163. Los Alamos, NM: Los Alamos National Laboratory.
Beale, J. C., and R. D. Reitz. 1999. “Modeling spray atomization with the Kelvin-Helmholtz/Rayleigh-Taylor hybrid model.” Atomization Sprays 9 (6): 623–650. https://doi.org/10.1615/AtomizSpr.v9.i6.40.
Bo, Y., H. Wu, P. Xiao, H. Li, Z. Shi, and X. Li. 2022. “Numerical study on the effect of multiple injection strategies on ignition processes for low-temperature diesel spray.” Fuel 324 (Feb): 124697. https://doi.org/10.1016/j.fuel.2022.124697.
Di Sarli, V., A. Di Benedetto, and G. Russo. 2010. “Sub-grid scale combustion models for large eddy simulation of unsteady premixed flame propagation around obstacles.” J. Hazard. Mater. 180 (1): 71–78. https://doi.org/10.1016/j.jhazmat.2010.03.006.
Dong, D., X. Chen, Y. Wang, G. Xiao, B. Li, J. Zhu, and Y. Wang. 2022. “Experimental investigation and analysis of three dilution strategies in an SI turbocharged engine regarding combustion, fuel consumption, and emissions.” J. Energy Eng. 148 (5): 04022027. https://doi.org/doi:10.1061/(ASCE)EY.1943-7897.0000844.
Dong, D., F. Wei, W. Long, P. Dong, H. Tian, J. Tian, P. Wang, M. Lu, and X. Meng. 2023. “Optical investigation of ammonia rich combustion based on methanol jet ignition by means of an ignition chamber.” Fuel 345 (Mar): 128202. https://doi.org/10.1016/j.fuel.2023.128202.
Fang, X., R. Ismail, K. Bushe, and M. Davy. 2020a. “Simulation of ECN diesel spray a using conditional source-term estimation.” Combust. Theor. Model. 24 (4): 725–760. https://doi.org/10.1080/13647830.2020.1752942.
Fang, X., R. Ismail, N. Sekularac, and M. Davy. 2020b. On the prediction of spray a end of injection phenomenon using conditional source-term estimation. Warrendale, PA: SAE International.
Gong, C., M. Jangi, and X.-S. Bai. 2014. “Large eddy simulation of -Dodecane spray combustion in a high pressure combustion vessel.” Appl. Energy 136 (Dec): 373–381. https://doi.org/10.1016/j.apenergy.2014.09.030.
Gonzalez, D., Z. W. Lian, and R. D. Reitz. 1992. Modeling diesel engine spray vaporization and combustion. Warrendale, PA: SAE International.
Hall, C., and M. Kassa. 2021. “Advances in combustion control for natural gas–diesel dual fuel compression ignition engines in automotive applications: A review.” Renewable Sustainable Energy Rev. 148 (Dec): 111291. https://doi.org/10.1016/j.rser.2021.111291.
Hariharan, D., S. Rajan Krishnan, K. Kumar Srinivasan, and A. Sohail. 2021. “Multiple injection strategies for reducing HC and CO emissions in diesel-methane dual-fuel low temperature combustion.” Fuel 305 (Dec): 121372. https://doi.org/10.1016/j.fuel.2021.121372.
Heywood, J. B. 1988. Internal combustion engine fundamentals.
Kahila, H., A. Wehrfritz, O. Kaario, M. Ghaderi Masouleh, N. Maes, B. Somers, and V. Vuorinen. 2018. “Large-eddy simulation on the influence of injection pressure in reacting Spray A.” Combust. Flame 191 (Mar): 142–159. https://doi.org/10.1016/j.combustflame.2018.01.004.
Kahila, H., A. Wehrfritz, O. Kaario, and V. Vuorinen. 2019. “Large-eddy simulation of dual-fuel ignition: Diesel spray injection into a lean methane-air mixture.” Combust. Flame 199 (Feb): 131–151. https://doi.org/10.1016/j.combustflame.2018.10.014.
Karimkashi, S., M. Gadalla, J. Kannan, B. Tekgül, O. Kaario, and V. Vuorinen. 2022. “Large-eddy simulation of diesel pilot spray ignition in lean methane-air and methanol-air mixtures at different ambient temperatures.” Int. J. Engine Res. 24 (3): 965–981. https://doi.org/10.1177/14680874211070368.
Lee, C. F. F., Y. Wu, H. Wu, Z. Shi, L. Zhang, and F. J. F. Liu. 2019. “The experimental investigation on the impact of toluene addition on low-temperature ignition characteristics of diesel spray.” Fuel 254 (Oct): 115580. https://doi.org/10.1016/j.fuel.2019.05.163.
Li, B., Y. Wang, W. Long, J. Zhu, J. Tian, J. Cui, and Y. Wang. 2020. “Experimental research on the effects of kerosene on the pre-injection spray characteristics and engine performance of dual-direct injection diesel jet controlled compression ignition mode.” Fuel 281 (Mar): 118691. https://doi.org/10.1016/j.fuel.2020.118691.
Meng, X., J. Wang, Y. Zhou, H. Tian, W. Long, and M. Bi. 2020. “Study of using diesel/high-ON biofuel blends as the pilot fuel with large proportion and split injection in the dual-fuel combustion.” Fuel 268 (Mar): 117345. https://doi.org/10.1016/j.fuel.2020.117345.
Muralidharan, M., A. Srivastava, and M. Subramanian. 2019. A technical review on performance and emissions of compressed natural gas—Diesel dual fuel engine. SAE Technical Paper No. 2019-28-2390. Warrendale, PA: SAE International. https://doi.org/10.4271/2019-28-2390.
Ouchikh, S., M. S. Lounici, K. Loubar, L. Tarabet, and M. Tazerout. 2022. “Effect of diesel injection strategy on performance and emissions of CH4/diesel dual-fuel engine.” Fuel 308 (Feb): 121911. https://doi.org/10.1016/j.fuel.2021.121911.
Papagiannakis, R. G. 2018. “Comparative assessment for improvement of performance and exhaust emissions in existing dual-fuel diesel engines.” J. Energy Eng. 144 (5): 04018054. https://doi.org/10.1061/(ASCE)EY.1943-7897.0000572.
Papagiannakis, R. G., D. T. Dimitrios, S. R. Krishnan, K. K. Srinivasan, C. D. Rakopoulos, and D. C. Rakopoulos. 2016. “Numerical evaluation of the effects of compression ratio and diesel fuel injection timing on the performance and emissions of a fumigated natural gas–diesel dual-fuel engine.” J. Energy Eng. 142 (2): E4015015. https://doi.org/10.1061/(ASCE)EY.1943-7897.0000326.
Pei, Y., B. Hu, and S. Som. 2015a. “Large eddy simulation of an N-Dodecane spray flame under different ambient oxygen conditions.” In Proc., ASME 2015 Internal Combustion Engine Division Fall Technical Conf. New York: ASME. https://doi.org/10.1115/ICEF2015-1034.
Pei, Y., S. Som, P. Kundu, and G. Goldin. 2015b. Large eddy simulation of a reacting spray flame under diesel engine conditions. SAE Technical Paper No. 2015-01-1844. Warrendale, PA: SAE International. https://doi.org/10.4271/2015-01-1844.
Pei, Y., S. Som, E. Pomraning, P. K. Senecal, S. A. Skeen, J. Manin, and L. M. Pickett. 2015c. “Large eddy simulation of a reacting spray flame with multiple realizations under compression ignition engine conditions.” Combust. Flame 162 (12): 4442–4455. https://doi.org/10.1016/j.combustflame.2015.08.010.
Pham, Q., S. Park, A. K. Agarwal, and S. Park. 2022. “Review of dual-fuel combustion in the compression-ignition engine: Spray, combustion, and emission.” Energy 250 (Feb): 123778. https://doi.org/10.1016/j.energy.2022.123778.
Pirouzpanah, V., and R. K. Sarai. 2003. “Reduction of emissions in an automotive direct injection diesel engine dual-fuelled with natural gas by using variable exhaust gas recirculation.” Proc. Inst. Mech. Eng., Part D: J. Automob. Eng. 217 (8): 719–725. https://doi.org/10.1243/09544070360692104.
Pomraning, E. 2000. Development of large eddy simulation turbulence models.
Post, S. L., and J. Abraham. 2002. “Modeling the outcome of drop–drop collisions in diesel sprays.” Int. J. Multiph. Flow 28 (6): 997–1019. https://doi.org/10.1016/S0301-9322(02)00007-1.
Rahimi, A., E. Fatehifar, and R. K. Saray. 2010. “Development of an optimized chemical kinetic mechanism for homogeneous charge compression ignition combustion of a fuel blend of n-heptane and natural gas using a genetic algorithm.” Proc. Inst. Mech. Eng., Part D: J. Automob. Eng. 224 (9): 1141–1159. https://doi.org/10.1243/09544070JAUTO1343.
Richards, K., P. Senecal, and E. Pomraning. 2020. CONVERGE 3.0 manual. Madison, WI: Convergent Science.
Schmidt, D. P., and C. J. Rutland. 2000. “A new droplet collision algorithm.” J. Comput. Phys. 164 (1): 62–80. https://doi.org/10.1006/jcph.2000.6568.
Sharma, H., A. Dhir, and S. K. Mahla. 2021. “Application of clean gaseous fuels in compression ignition engine under dual fuel mode: A technical review and Indian perspective.” J. Cleaner Prod. 314 (Dec): 128052. https://doi.org/10.1016/j.jclepro.2021.128052.
Srinivasan, K. K., S. R. Krishnan, and Y. Qi. 2013. “Cyclic combustion variations in dual fuel partially premixed pilot-ignited natural gas engines.” J. Energy Res. Technol. 136 (1): 012003. https://doi.org/10.1115/1.4024855.
Tekgül, B., H. Kahila, O. Kaario, and V. Vuorinen. 2020. “Large-eddy simulation of dual-fuel spray ignition at different ambient temperatures.” Combust. Flame 215 (Feb): 51–65. https://doi.org/10.1016/j.combustflame.2020.01.017.
Tekgül, B., H. Kahila, S. Karimkashi, O. Kaario, Z. Ahmad, É. Lendormy, J. Hyvonen, and V. Vuorinen. 2021. “Large-eddy simulation of spray assisted dual-fuel ignition under reactivity-controlled dynamic conditions.” Fuel 293 (Mar): 120295. https://doi.org/10.1016/j.fuel.2021.120295.
Tian, J., M. Zhao, W. Long, K. Nishida, T. Fujikawa, and W. Zhang. 2016. “Experimental study on spray characteristics under ultra-high injection pressure for DISI engines.” Fuel 186 (Dec): 365–374. https://doi.org/10.1016/j.fuel.2016.08.086.
Turns, S. R. 2000. An introduction to combustion: Concepts and applications, 1–665. New York: McGraw-Hill.
Valentino, M., X. Jiang, and H. Zhao. 2007. “A comparative RANS/LES study of transient gas jets and sprays under diesel conditions.” Atomization Sprays 17 (5): 451–472. https://doi.org/10.1615/AtomizSpr.v17.i5.40.
Wang, Y., P. Dong, W. Long, J. Tian, F. Wei, Q. Wang, Z. Cui, and B. Li. 2022. “Characteristics of evaporating spray for direct injection methanol engine: Comparison between methanol and diesel spray.” Processes 10 (Mar): 1132. https://doi.org/10.3390/pr10061132.
Wei, F., P. Wang, J. Cao, W. Long, D. Dong, H. Tian, J. Tian, X. Zhang, and M. Lu. 2023. “Visualization investigation of jet ignition ammonia-methanol by an ignition chamber fueled .” Fuel 349 (Mar): 128658. https://doi.org/10.1016/j.fuel.2023.128658.
Wei, F., Y. Wang, H. Tian, J. Tian, W. Long, and D. Dong. 2022. “Visualization study on lean combustion characteristics of the premixed methanol by the jet ignition of an ignition chamber.” Fuel 308 (Feb): 122001. https://doi.org/10.1016/j.fuel.2021.122001.
Wei, L., and P. Geng. 2016. “A review on natural gas/diesel dual fuel combustion, emissions and performance.” Fuel Process. Technol. 142 (Mar): 264–278. https://doi.org/10.1016/j.fuproc.2015.09.018.
Yang, B., and K. Zeng. 2018. “Effects of natural gas injection timing and split pilot fuel injection strategy on the combustion performance and emissions in a dual-fuel engine fueled with diesel and natural gas.” Energy Convers. Manage. 168 (Jun): 162–169. https://doi.org/10.1016/j.enconman.2018.04.091.
Yousefi, A., H. Guo, and M. Birouk. 2018. “An experimental and numerical study on diesel injection split of a natural gas/diesel dual-fuel engine at a low engine load.” Fuel 212 (Jan): 332–346. https://doi.org/10.1016/j.fuel.2017.10.053.
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Published In
Journal of Energy Engineering
Volume 150 • Issue 5 • October 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Jan 15, 2024
Accepted: May 8, 2024
Published online: Aug 1, 2024
Published in print: Oct 1, 2024
Discussion open until: Jan 1, 2025
ASCE Technical Topics:
- Air pollution
- Chemical processes
- Chemistry
- Coastal engineering
- Coastal processes
- Coasts, oceans, ports, and waterways engineering
- Combustion
- Eddy (fluid dynamics)
- Emissions
- Energy engineering
- Energy sources (by type)
- Engineering fundamentals
- Engines
- Environmental engineering
- Equipment and machinery
- Fuels
- Natural gas
- Non-renewable energy
- Ocean currents
- Petroleum
- Pollution
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