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Optimization of injector arrangement and injection strategy for diesel-piloted high-pressure direct-injection ammonia engines
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Bin Pang1, Shiwu Yu2, Xiaoshuai Hou1, Xuewen Lu1, Haoye Liu2, Tianyou Wang2
Transactions of CSICE | 2025, 43(5) : 385 - 392
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Transactions of CSICE | 2025, 43(5): 385-392
Optimization of injector arrangement and injection strategy for diesel-piloted high-pressure direct-injection ammonia engines
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Bin Pang1, Shiwu Yu2, Xiaoshuai Hou1, Xuewen Lu1, Haoye Liu2, Tianyou Wang2
Affiliations
  • 1.State Key Laboratory of Engines and Powertrain System，Weichai Power Company Limited，Weifang 261061，China
  • 2.State Key Laboratory of Engines，Tianjin University，Tianjin 300350，China
Published: 2025-09-25 doi: 10.16236/j.cnki.nrjxb.202505044
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A numerical simulation study was conducted on the co-optimization of injector configuration parameters and injection strategies for diesel-piloted high-pressure direct-injection ammonia combustion. Results indicate that reducing injector offset increases the proportion of effectively-ignited ammonia spray, improving combustion efficiency and thermal efficiency. Under high load conditions, the ammonia-first-diesel-later(AD) injection strategy leads to obstruction of the diesel flame by the ammonia spray, preventing full effective ignition of ammonia, with maximum combustion losses reaching 27.62%. Using a two-stage ammonia(ammonia-diesel-ammonia, ADA) injection strategy or optimizing the side injector nozzle insertion distance effectively avoids interference between the ammonia spray and diesel flame distribution, enhancing the ignition and combustion processes. The optimal solution features: side nozzle offset of 10mm, insertion distance of 6mm, diesel-first-ammonia-later(DA) injection strategy at low load(thermal efficiency of 49.68%), and AD injection strategy at high load(thermal efficiency of 50.75%). The sub-optimal solution adopts a side nozzle offset of 10 mm with other parameters unchanged: DA injection strategy at low load(thermal efficiency of 50.26%) and ADA injection strategy at high load(thermal efficiency of 49.93%).

diesel-piloted high-pressure direct-injection ammonia combustion  /  injector arrangement  /  injection strategy
庞斌, 余诗武, 侯潇帅, 鹿雪文, 刘浩业, 王天友. 柴油引燃液氨高压直喷发动机喷射器布置和喷射策略协同优化. 内燃机学报, 2025 , 43 (5) : 385 -392 . DOI: 10.16236/j.cnki.nrjxb.202505044
Bin Pang, Shiwu Yu, Xiaoshuai Hou, Xuewen Lu, Haoye Liu, Tianyou Wang. Optimization of injector arrangement and injection strategy for diesel-piloted high-pressure direct-injection ammonia engines[J]. Transactions of CSICE, 2025 , 43 (5) : 385 -392 . DOI: 10.16236/j.cnki.nrjxb.202505044
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Year 2025 volume 43 Issue 5
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Article Info
doi: 10.16236/j.cnki.nrjxb.202505044
  • Receive Date：2024-12-26
  • Online Date：2026-11-05
  • Published：2025-09-25
Article Data
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History
  • Received：2024-12-26
  • Revised：2025-05-29
Funding
Affiliations
    1.State Key Laboratory of Engines and Powertrain System，Weichai Power Company Limited，Weifang 261061，China
    2.State Key Laboratory of Engines，Tianjin University，Tianjin 300350，China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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