Numerical analysis of various combustion chamber bowl geometries on combustion, performance, and emissions parameters in a diesel engine

Year 2024, Volume: 13 Issue: 2, 63 - 72, 30.06.2024

Hüsna Topkaya , Mehmet Zerrakki Işık , Yahya Çelebi , Hüseyin Aydın

https://doi.org/10.18245/ijaet.1351644

Abstract

In this paper, numerical analysis of a diesel engine with various combustion chamber bowl geometries was investigated. Numerical analyses of asymmetrical bowl forms were carried out using the Ansys Forte software. Analyses were done for three different piston bowl geometries in a single-cylinder, air-cooled diesel engine at 1500 rpm engine speed. Three different bowl geometries were created, the piston-1 model is a commercial one for used engine, in the piston-2 pedestal area is removed from the piston, and in the cylindrical model bowl geometry has more straight borders. The results of the numerical study were confirmed with the results of experiments which is carried out for the piston-1 model. Simulation results showed a good correlation with experimental results. According to the results of the numerical study, the highest in-cylinder temperature was determined as 1213 K for the piston-1 model. In the piston-1 model, the combustion efficiency was improved with the increase of the swirl by the increased combustion temperature. As a result of the analysis, the thermal and combustion efficiencies of the piston-1 model were higher than the other models. The maximum turbulence velocity was observed at -12 CA for three different piston bowl models as 4.1 m/s, 4.06 m/s, and 3.9 m/s for piston-1, piston-2, and cylindrical respectively.

Keywords

Chamber, Diesel engine, Piston, Numerical Anysis

References

• Bawankar, Chetan S., and Rajesh Gupta, "Effects of piston bowl geometry on combustion and emission characteristics on diesel engine: a cfd case study." International Journal of Research in Engineering and Technology, 5, 81-93, 2016.
• İhsan Kalay, “Dizel motorlarda piston çanağının incelenmesi”, Yüksek Lisans Tezi, Istanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2011.
• İlker Temizer, Ömer Cihan, “Heat and flow analysis of different piston bowl geometries in a diesel engine”, International Journal of Automotive Science and Technology 5 (3), 206-213, 2021.
• Ganji, P. R., Singh, R. N., Raju, V. R. K., & Srinivasa Rao, S., “Design of piston bowl geometry for better combustion in direct-injection compression ignition engine.” Sādhanā, 43, 1-9, 2018.
• Pham, V. C., Kim, J. K., Lee, W. J., Choe, S. J., Le, V. V., & Choi, J. H., “Effects of piston bowl geometry on combustion and emissions of a four-stroke heavy-duty diesel marine engine.” Applied Sciences, 12(24), 13012, 2022.
• Kakaee, A. H., Nasiri-Toosi, A., Partovi, B., & Paykani, A., “Effects of piston bowl geometry on combustion and emissions characteristics of a natural gas/diesel RCCI engine.” Applied Thermal Engineering, 102, 1462-1472, 2016.
• Hariharan, D., Rahimi Boldaji, M., Yan, Z., Gainey, B., & Lawler, B., “Exploring the effects of piston bowl geometry and injector included angle on dual-fuel and single-fuel RCCI.” Journal of Engineering for Gas Turbines and Power, 143 (11), 111013, 2021.
• Gulcan, Halil Erdi, and Murat Ciniviz, "Experimental study on the effect of piston bowl geometry on the combustion performance and pollutant emissions of methane-diesel common rail dual-fuel engine." Fuel, 345, 128175, 2023.
• Dempsey, A. B., Walker, N. R., and Reitz, R., “Effect of piston bowl geometry on dual fuel reactivity controlled compression ignition (RCCI) in a light-duty engine operated with gasoline/diesel and methanol/diesel,” SAE Int. J. Engines, 6 (1), 78–100, 2013.
• Splitter, D., Wissink, M., Kokjohn, S., & Reitz, R. D., “Effect of compression ratio and piston geometry on RCCI load limits and efficiency”, SAE Technical Paper, No. 2012-01-0383, 2012.
• Jaichandar, S., P. Senthil Kumar, and K. Annamalai, "Combined effect of injection timing and combustion chamber geometry on the performance of a biodiesel fueled diesel engine.", Energy 47.1, 388-394, 2012.
• Mobasheri, Raouf, and Zhijun Peng., “Analysis of the effect of re-entrant combustion chamber geometry on combustion process and emission formation in a HSDI diesel engine.” SAE Technical Paper, No. 2012-01-0144, 2012.
• Pham, V. C., Kim, J. K., Lee, W. J., Choe, S. J., Le, V. V., & Choi, J. H., “Effects of piston bowl geometry on combustion and emissions of a four-stroke heavy-duty diesel marine engine.”, Applied Sciences, 12(24), 1301, 2022.
• Lee, Seungpil, and Sungwook Park., "Optimization of the piston bowl geometry and the operating conditions of a gasoline-diesel dual-fuel engine based on a compression ignition engine.", Energy, 121, 433-448, 2017.