Influence of Geometric Parameters of Pre-Chamber on Mixture Formation in Marine Ammonia/Hydrogen Engines

Abstract

Pre-chamber ignition technology can address the issue of uneven in-cylinder mixture combustion in large-bore marine engines. The impact of various pre-chamber structures on the formation of the mixture and jet flames within the pre-chamber is explored. This study performed numerical simulations on a large-bore marine ammonia/hydrogen pre-chamber engine prototype, considering pre-chamber volume, throat diameter, the distance between the hydrogen injector and the spark plug, and the hydrogen injector angle. Compared with the original engine, when the pre-chamber volume is 73.4 ml, the throat diameter is 14 mm, the distance ratio is 0.92, and the hydrogen injector angle is 80°. Moreover, the peak pressure in the pre-chamber increased by 23.1%, and that in the main chamber increased by 46.3%. The results indicate that the performance of the original engine is greatly enhanced by altering its fuel and pre-chamber structure.

Keywords

Pre-chamber ignition / Ammonia/hydrogen fuel / Pre-chamber mixture formation / Jet characteristics / Marine engine

References

[1] Anderson A, Chen TN, Hutchins WT. The development and application of design criteria for pre-combustion chambers on natural gas fueled engines. Mechanical Engineering, 1984, 106(5): 94

[2] Attard WP, Fraser N, Parsons P, Toulson E. A turbulent jet ignition pre-chamber combustion system for large fuel economy improvements in a modern vehicle powertrain. SAE Technology Paper, 2010, 3(220-37

[3] Biswas S, Qiao L. Ignition of ultra-lean premixed H2/air using multiple hot turbulent jets generated by pre-chamber combustion. Applied Thermal Engineering, 2018, 132: 102-114

[4] Bunce M, Blaxill H, Kulatilaka W, Jiang NB. The effects of turbulent jet characteristics on engine performance using a pre-chamber combustor. SAE Technical Paper, 2014, 01: 1195

[5] Dale J, Oppenheim A. Enhanced ignition for I. C. engines with premixed gases. SAE Trans, 1981, 810146: 606-621

[6] Haruna A, Tanimu G, Ibrahim I, Garba ZN, Yahaya SM, Musa SG, Merican ZMA. Mitigating oil and gas pollutants for a sustainable environment-Critical review and prospects. Journal of Cleaner Production, 2023, 416: 137863

[7] Hlaing P, Marquez ME, Cenker E, Im HG, Johansson B, Turner JWG. Effects of volume and nozzle area in narrow-throat sparkignited pre-chamber combustion engines. Fuel, 2022, 313: 123029

[8] Jamrozik A. Lean combustion by a pre-chamber charge stratification in a stationary spark ignited engine. J. Mech. Sci. Technol., 2015, 29(5): 2269-2278

[9] Kleeman MJ, Zapata C, Stilley J, Hixson M. PM2.5 co-benefits of climate change legislation part 2: California governor’s executive order S-3-05 applied to the transportation sector. Nature Climate Change, 2013, 117(1–2399-414

[10] Latsch R, Schlembach H (1980) Externally ignited internal combustion engine. US Patent 4 218: 992

[11] Liu XL, Aljabri H, Panthi N, AlRamadan AS, Cenker E, Alshammari AT, Magnotti G, Im HG. Computational study of hydrogen engine combustion strategies: Dual-Fuel compression ignition with Port- and Direct-Injection, Pre-Chamber Combustion, and Spark-Ignition. Fuel, 2023, 350: 128801

[12] Liu Z, Zhou L. Enhanced combustion of ammonia engine based on novel air-assisted pre-chamber turbulent jet ignition. Energy Convers Manag, 2023, 276: 116526

[13] Liu Z, Wei H, Shu G, Zhou L. Ammonia-hydrogen engine with reactivity-controlled turbulent jet ignition. Fuel, 2023, 348: 128580

[14] Liu Z, Zhou L, Zhong L, Liu P. Experimental investigation on the combustion characteristics of NH3/H2/air by the spark ignition and turbulent jet ignition. Combustion Science and Technology, 2022, 196(1): 73-94

[15] Sun X, Liu H, Duan X, Guo H, Li Y, Qiao J, Liu Q, Liu J. Effect of hydrogen enrichment on the flame propagation, emissions formation and energy balance of the natural gas spark ignition engine. Fuel, 2022, 307: 121843

[16] Validi A, Schock H, Jaberi F. Turbulent jet ignition assisted combustion in a rapid compression machine. Combustion and Flame, 2017, 186: 65-82

[17] Wu H, Wang L, Wang X, Sun B, Zhao Z, Lee CF, Liu FS. The effect of turbulent jet induced by pre-chamber sparkplug on combustion characteristics of hydrogen-air pre-mixture. Int J Hydrogen Energy, 2018, 43: 8116-26

[18] Yu Z, Li X, Zhao J, Shi L. Development of ammonia reaction kinetic mechanism under engine-relevant conditions. Energy & Fuels, 2024, 38(1728-741

[19] Zhu S, Akehurst S, Lewis A, Yuan H. A review of the pre-chamber ignition system applied on future low-carbon spark ignition engines. Renewable and Sustainable Energy Reviews, 2022, 154: 111872

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Harbin Engineering University and Springer-Verlag GmbH Germany, part of Springer Nature