Application and extension of diesel spray theory in analysis of methanol spray characteristics under high-pressure injection conditions

Abstract

Methanol has received widespread attention as a kind of alternative fuel for internal combustion engines because of its wide range of sources, low price, low combustion emission pollution, and carbon neutrality. Meanwhile, the relatively developed diesel spray theories have a great reference value to theoretical analysis of high-pressure methanol injection. Based on the optical experiment of the methanol sprays under high-pressure injection conditions, the empirical models for predicting spray tip penetration, spray angle, spray area, and spray volume of diesel were used to calculate the parameters of the methanol sprays. These calculation values were then compared with the experimental values to establish empirical models of high-pressure methanol spray characteristics. On this basis, an assessment of the adaptability of the diesel spray similarity theory applied to the high-pressure methanol sprays was conducted under similarity conditions. The results show that Wakuri's model has the best predictive performance on the methanol spray tip penetration (the average relative error is 4.31%), and Inagaki's model provides the most precise predictions on the methanol spray angle (the average relative error is 2.63%). After correcting the constants, empirical models that can describe the methanol spray characteristics in this experiment were proposed. In terms of the similarity theory, the diesel spray similarity theory shows good adaptability to the spray tip penetration and spray angle of the high-pressure methanol sprays with nozzle diameters of 0.12 mm and 0.15 mm under similarity conditions. The above results can serve as a basis for extending diesel spray theory to methanol and for the upsizing or downsizing design of direct injection methanol engines with different bore sizes of the same series.

CRediT authorship contribution statement

Pengbo Dong: Writing - review & editing, Conceptualization. Yifan Zhang: Writing - original draft, Formal analysis. Yang Wang: Methodology, Data curation. Wuqiang Long: Supervision. Jiangping Tian: Resources. Hua Tian: Visualization. Keiya Nishida: Supervision.

Declaration of competing interest

We declare that we have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgement

This work was financially supported by the National Key R&D Program of China (No. 2022YFB4300700).

References

[1] Brijesh, P., Sreedhara, S., 2013. Exhaust emissions and its control methods in compression ignition engines: a review. Int. J. Automot. Technol. 14 (2), 195-206. https://doi.org/10.1007/s12239_013_0022_2.

[2] Chikahisa, T., Murayama, T., 1990. Theory on combustion similarity for different-sized diesel engines. JSME International Journal, Series 2: Fluids Engineering, Heat Transfer, Power, Combustion, Thermophysical Properties 33 (2). https://doi.org/10.1299/jsmeb1988.33.2_395.

[3] Delacourt, E., Desmet, B., Besson, B., 2005. Characterisation of very high pressure diesel sprays using digital imaging techniques. Fuel 84 (7-8), 859-867. https://doi.org/10.1016/j.fuel.2004.12.003.

[4] Do, T.N., Kim, J., 2019. Process development and techno-economic evaluation of methanol production by direct CO₂ hydrogenation using solar-thermal energy. J. CO2 Util. 33, 461-472. https://doi.org/10.1016/j.jcou.2019.07.003.

[5] Farzaneh, F., Jung, S., 2023. Lifecycle carbon footprint comparison between internal combustion engine versus electric transit vehicle: a case study in the U.S. J. Clean. Prod. 390 (March 1). https://doi.org/10.1016/j.jclepro.2023.136111.

[6] Fayyazbakhsh, A., Bell, M.L., Zhu, X., Mei, X., Koutný M., Hajinajaf, N., 2022. Engine emissions with air pollutants and greenhouse gases and their control technologies. J Clean Prod 376, 134260. https://doi.org/10.1016/j.jclepro.2022.134260.

[7] Ghosh, A., Ravikrishna, R.V., 2021. Evaporating spray characteristics of methanol-indiesel emulsions. Fuel 290. https://doi.org/10.1016/j.fuel.2020.119730.

[8] Gong, Y., Liu, S., Li, Y., 2007. Investigation on methanol spray characteristics. Energy Fuel. 21 (5), 2991-2997. https://doi.org/10.1021/ef0605089.

[9] Hiroyasu, H., Arai, M., 1990. Structures of fuel sprays in diesel engines. SAE Technical Paper 900475. https://doi.org/10.4271/900475.

[10] Kitaguchi, K., Hatori, S., Hori, T., Senda, J., 2012. Optimization of breakup model using LES of diesel spray. Atomization Sprays 22 (1). https://doi.org/10.1615/AtomizSpr.2012004610.

[11] Levich, V.G., Tobias, C.W., 1963. Physicochemical hydrodynamics. J. Electrochem. Soc. 110 (11), 251C. https://doi.org/10.1149/1.2425619. DOI: 10.1149/1.2425619.

[12] Lloyd, A.C., Cackette, T.A., 2001. Diesel engines: environmental impact and control. J. Air Waste Manag. Assoc. 51 (6), 809-847. https://doi.org/10.1080/10473289.2001.10464315.

[13] Monnerie, N., Gan, P.G., Roeb, M., Sattler, C., 2020. Methanol production using hydrogen from concentrated solar energy. Int. J. Hydrogen Energy 45 (49), 26117-25. https://doi.org/10.1016/j.ijhydene.2019.12.200.

[14] Matamis, A., Lonn, S., Tuner, M., Andersson, O., Richter, M., 2020. Optical characterization of methanol sprays and mixture formation in a compression-ignition heavy-duty engine. SAE Technical Paper. https://doi.org/10.4271/2020-01-2109.

[15] Inagaki, K., Mizuta, J., Kawamura, K., Idota, Y., Hashizume, T., 2016. Theoretical study on spray design for small-bore diesel engine. SAE Technical Paper, 2016-01-0740. https://doi.org/10.4271/2016-01-0740.

[16] Naber, J.D., Siebers, D.L., 1996. Effects of gas density and vaporization on penetration and dispersion of diesel sprays. SAE Technical Paper 960034. https://doi.org/10.4271/960034.

[17] Ni, P., Wang, X., Li, H., 2020. A review on regulations, current status, effects and reduction strategies of emissions for marine diesel engines. Fuel 279, 118477. https://doi.org/10.1016/j.fuel.2020.118477.

[18] Ravi, S.S., Osipov, S., Turner, J.W.G., 2023. Impact of modern vehicular technologies and emission regulations on improving global air quality. Atmosphere 14 (7). https://doi.org/10.3390/atmos14071164.

[19] Shi, Y., Reitz, R.D., 2008. Study of Diesel Engine Size-Scaling Relationships Based on Turbulence and Chemistry Scales. SAE Technical Paper 2008-01-0955.

[20] Song, J., Li, M., Wang, S., Ye, T., 2022. To what extent does environmental regulation influence emission reduction? Evidence from local and neighboring locations in China. Sustainability 14 (15). https://doi.org/10.3390/su14159714 from. https://www.mdpi.com/2071-1050/14/15/9714.

[21] Su, S., Ge, Y., Wang, X., Zhang, M., Hao, L., Tan, J., Shi, F., Guo, D., Yang, Z., 2020. Evaluating the in-service emissions of high-mileage dedicated methanol-fueled passenger cars: regulated and unregulated emissions. Energies 13 (11). https://doi.org/10.3390/en13112680 from. https://www.mdpi.com/1996-1073/13/11/2680.

[22] Wakuri, Y., Fujii, M., Amitani, T., Tsuneya, R., 1959. Studies on the penetration of fuel spray of diesel engine. Transactions of the Japan Society of Mechanical Engineers 25 (156), 820-826. https://doi.org/10.1299/kikai1938.25.820.

[23] Wang, Y., Dong, P., Long, W., Tian, J., Wei, F., Wang, Q., Cui, Z., Li, B., 2022. Characteristics of evaporating spray for direct injection methanol engine: comparison between methanol and diesel spray. Processes 10 (6). https://doi.org/10.3390/pr10061132.

[24] Wu, Y., Wang, C., Huang, C., Wang, W., Jin, C., Zhang, Z., Zhang, X, Zheng, Z, Liu, H, Yao, M., 2024. The combustion and emission characteristics of pure methanol as a substitute fuel for compression ignition engines. Int. J. Green Energy 21 (14), 3313-3329. https://doi.org/10.1080/15435075.2024.2376714.

[25] Yang, L., Yu, B., Yang, B., Chen, H., Malima, G., Wei, Y.M., 2021. Life cycle environmental assessment of electric and internal combustion engine vehicles in China. J. Clean. Prod. 285. https://doi.org/10.1016/j.jclepro.2020.124899.

[26] Zhang, Z., Ding, X., Yang, X., Tu, W., Wang, L., Zou, Z., 2021. Shedding light on CO2: catalytic synthesis of solar methanol. EcoMat 3 (1). https://doi.org/10.1002/eom2.12078.

[27] Zhou, X., Li, T., Lai, Z., Huang, S., 2021a. Similarity of split-injected fuel sprays for different size diesel engines. Int. J. Engine Res. 22 (3), 1028-1044. https://doi.org/10.1177/1468087419849771.

[28] Zhou, X., Li, T., Lai, Z., Wang, B., 2018. Scaling fuel sprays for different size diesel engines. Fuel 225, 358-369. https://doi.org/10.1016/j.fuel.2018.03.167.

[29] Zhou, X., Li, T., Wei, Y., Wang, N., 2020. Scaling liquid penetration in evaporating sprays for different size diesel engines. Int. J. Engine Res. 21 (9), 1662-1677. https://doi.org/10.1177/1468087419889835.

[30] Zhou, X., Li, T., Yi, P., 2021b. The similarity ratio effects in design of scaled model experiments for marine diesel engines. Energy 231. https://doi.org/10.1016/j.energy.2021.121116.

[31] Pucilowski, M., Jangi, M., Shamun, S., Tuner, M., Bai, X.S., 2017. The effect of injection pressure on the NOx emission rates in a heavy-duty DICI engine running on methanol. SAE Technical Papers 2017-01-2194 2017. https://doi.org/10.4271/2017-01-2194.

[32] Svensson, M., Tuner, M., Verhelst, S., 2022. Low load ignitability of methanol in a heavyduty compression ignition engine. SAE Technical Paper. https://doi.org/10.4271/2022-01-1093, 2022-01-1093.

[33] Garcia, A., Monsalve-Serrano, J., Guzmán Mendoza, M., Gaillard, P., Durrett, R., Vassallo, A., Pesce, F., 2023. Evaluation of neat methanol as fuel for a light-duty compression ignition engine. SAE Technical Papers 2023-24-0047. https://doi.org/10.4271/2023-24-0047.

[34] Luo, H., Liu, L., Nishida, K., Zhou, W., 2024. Development and utilization on green energy in marine powertrain: challenges and opportunities. Green Energy and Resources 2. https://doi.org/10.1016/j.gerr.2024.100076.