为促进新型替代燃料的应用，缓解日益严重的能源危机和环境污染情况，以TBD620单缸柴油机为研究对象构建仿真模型，通过模拟研究天然气替代率对柴油机燃烧及排放性能的影响。柴油机在额定工况时，设置天然气替代率为0%～90%进行仿真计算。随后，在天然气替代率为90%时，设置氢气掺混比为10%～90%做进一步优化。结果表明，天然气替代率为70%时柴油机性能较好，替代率为90%时性能较差。在天然气替代率为90%，随着掺氢比的增加，缸压峰值及最大燃烧温度都在增加。CH2O、CO、CO2、SOOT的最终排放量降低，NOx的最终排放量升高，柴油机的性能得到了改善。综合分析，在天然气替代率为90%时，选取掺氢比为50%的方案较为合适。
To promote the application of new alternative fuels and alleviate the increasingly serious energy crisis and environmental pollution, a TBD620 single-cylinder diesel engine was taken as the research object, and a simulation model was constructed to study the effect of natural gas substitution rate on the combustion and emission performance of diesel engines. When the diesel engine is in the rated working condition, the natural gas replacement rate is set to 0%-90% for simulation calculation. Subsequently, when the natural gas replacement rate is 90%, the hydrogen mixing ratio is set to 10%-90% for further optimization. The results show that the diesel engine performance is better when the natural gas replacement rate is 70%, and the performance is poor when the natural gas replacement rate is 90%. When the natural gas replacement rate is 90%, with the increase of the hydrogen mixing ratio, the peak cylinder pressure and the maximum combustion temperature all increase. The final emissions of CH2O, CO, CO2, SOOT are reduced, the final NOx emissions are increased, and the performance of the diesel engine is improved. Comprehensive analysis shows that when the natural gas replacement rate is 90%, it is more appropriate to select the scheme with a hydrogen mixing ratio of 50%.
2023,45(20): 127-134 收稿日期：2022-9-30
DOI：10.3404/j.issn.1672-7649.2023.20.024
分类号：U664.3
基金项目：高技术船舶科研项目（202123J-2）
作者简介：韩宇亮(1998-),男,硕士研究生,研究方向为双燃料发动机性能分析
参考文献：
[1] 王彬彬, 高敬博, 杨捷波, 等. 掺烧生物柴油耦合进气道加湿对柴油机燃烧及排放性能的影响[J]. 船舶工程, 2021, 43(3): 1–7
WANG B B, GAO J B, YANG J B, et al. Effect of coupled inlet humidification of biodiesel doped on combustion and emission performance of diesel engine[J]. Ship Engineering, 2021, 43(3): 1–7
[2] 全俐颖, 马远. 中国天然气海外供应体系多元化及战略储备研究[J]. 长春金融高等专科学校学报, 2022(1): 84–91
QUAN L Y, Ma Y. Research on the diversification and strategic reserve of China's natural gas overseas supply system[J]. Journal of Changchun University of Finance, 2022(1): 84–91
[3] 敬启建. 涡轮增压天然气柴油机燃烧与排放控制的试验研究[D]. 上海: 上海交通大学, 2015.
[4] 宋广舒, 刘世通, 苏东超, 等. 直喷天然气柴油机研究现状综述[J]. 内燃机与配件, 2021(15): 45-46
SONG G S, LIU S T, SU D C, et al A review of the research status of direct injection natural gas diesel engine[J]. Internal Combustion Engine and Accessories, 2021(15): 45-46
[5] 张恒, 龚希武. 柴油引燃缸内直喷天然气柴油机燃烧和排放特性研究[J]. 舰船科学技术, 2018, 40(5): 97–101
ZHANG Heng, GONG X W. Study on combustion and emission characteristics of direct injection of natural gas diesel engine in diesel ignition cylinder[J]. Ship Science and Technology, 2018, 40(5): 97–101
[6] MUNSHI S, HUANG J, ZHENG Z X, et al. Direct injection of natural gas at up to 600 bar in a pilot-ignited heavy-duty engine[J]. SAE International Journal of Engines, 2015.
[7] MICHAEL, BERGIN, PHILIP, et al. Combustion simulation of dual fuel cng engine using direct injection of natural gas and diesel[J]. Sae International Journal of Engines, 2015.
[8] 李孟涵, 张强, 李国祥, 等. 引燃柴油量及喷射间隔对直喷天然气柴油机排放的影响[J]. 农业工程学报, 2016, 32(6): 95–100
LI M H, ZHANG Q, LI G Xiang, et al. Effect of ignition diesel amount and injection interval on emission of direct injection natural gas diesel engine[J]. Transactions of the Chinese Society of Agricultural Engineering, 2016, 32(6): 95–100
[9] 陈长军. 柴油微引缸内直喷天然气柴油机燃烧过程仿真研究[D]. 长春: 吉林大学, 2011.
[10] HEGAB A, ROCCA A L, SHAYLER P. Towards keeping diesel fuel supply and demand in balance: dual-fuelling of diesel engines with natural gas[J]. Renewable and Sustainable Energy Reviews, 2017, 70: 666–697
[11] ZHU L, LI B L, LI A, et al. Effects of fuel reforming on large-bore low-speed two-stroke dual fuel marine engine combined with EGR and injection strategy[J]. International Journal of Hydrogen Energy, 2020, 45(53): 29505–29517
[12] 陈贵升, 魏峰, 李冰, 等. 不同进气氛围耦合废气再循环对双燃料柴油机工作过程的影响[J]. 内燃机工程, 2022, 43(2)
CHEN Guisheng, WEI Feng, Li Bing, et al Effect of coupled exhaust gas recirculation of different intake atmospheres on the working process of dual-fuel diesel engine[J] Internal Combustion Engine Engineering, 2022, 43(2).
[13] 李敬法, 苏越, 张衡, 等. 掺氢天然气管道输送研究进展[J]. 天然气工业, 2021, 41(4): 137–152
LI J Fa, SU Yue, ZHANG Heng, et al. Research progress on pipeline transportation of hydrogen-doped natural gas[J]. Natural Gas Industry, 2021, 41(4): 137–152
[14] 谢萍, 伍奕, 李长俊, 等. 混氢天然气管道输送技术研究进展[J]. 油气储运, 2021, 40(4): 361–370
XIE P, WU Y, Li C J, et al. Research progress on pipeline transportation technology of mixed hydrogen natural gas[J]. Oil and gas storage and transportation, 2021, 40(4): 361–370
[15] 李孟涵, 张强, 李国祥, 等. 引燃柴油量及喷射间隔对直喷天然气柴油机排放的影响[J]. 农业工程学报, 2016, 32(6): 95–100
LI M H, ZHANG Q, LI G X, et al. Effect of ignition diesel amount and injection interval on emission of direct injection natural gas diesel engine[J]. Transactions of the Chinese Society of Agricultural Engineering, 2016, 32(6): 95–100
[16] KAKOEE A, BAKHSHAN Y, AVAL S M, et al. An improvement of a lean burning condition of natural gas/diesel RCCI engine with a pre-chamber by using hydrogen[J]. Energy Conversion and Management, 2018, 166.
[17] A P R, B A P A, C R D R. A numerical study of the effects of using hydrogen, reformer gas and nitrogen on combustion, emissions and load limits of a heavy duty natural gas/diesel RCCI engine[J]. Applied Energy, 2017, 193(May 1): 182-198.
[18] 王珂. 天然气掺氢燃烧特性研究[D]. 荆州: 长江大学, 2021
[19] 姚强, 李永清, 等. 燃烧学导论[M]. 北京: 清华大学出版社, 2009: 127-131.
[20] 张尊华, 邵超凡, 李格升, 等. 柴油-天然气RCCI发动机燃烧过程数值模拟[J]. 华中科技大学学报(自然科学版), 2020, 48(7): 59-64
ZHANG Z H, S C F, LI G S, et al Numerical simulation of combustion process of diesel-natural gas RCCI engine[J]. Journal of Huazhong University of Science and Technology (Natural Science Edition), 2020, 48(7): 59-64
