High-Temperature Self-Ignition Characteristics of NH3-H2-DME Based on OH

被引：0
作者：
Chu, Xianglin [1 ]
Ma, Zhihao [1 ]
Li, Xin [1 ]
Wang, Xin [1 ]
Gao, Peixin [1 ]
机构：
[1] Vehicle and Transportation Engineering College, Henan University of Science and Technology, Luoyang
来源：
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2024年 / 42卷 / 04期
关键词：
ammonia; dimethyl ether; hydrogen; ignition delay time(IDT); shock tube;
D O I：
10.16236/j.cnki.nrjxb.202404036
中图分类号：
学科分类号：
摘要：
Ammonia(NH3) is a very promising zero-carbon alternative fuel，but its low reactivity limits its development and application. Blending other low-carbon or zero-carbon fuels complementary to its low reactivity characteristics can significantly improve its combustion characteristics. The ignition delay time(IDT) of NH3hydrogen(H2)-dimethyl ether(DME) ternary blended fuels with air was measured under the temperature variation from 1 300 —2 000 K，the pressure of 0.14 MPa and 1.00 MPa，and the equivalence ratio of 0.5，1.0 and 2.0 respectively，by using reflected shock wave and the self-luminescence property of fuel excited hydroxyl group(OH*) on a shock tube experimental platform. The experiment focused on the effects of the blending ratio of binary activator H2＋DME on the shortening rate of pure ammonia under each working condition. Results show that the equivalence ratio affects the ignition promotion of the activator，and the H2＋DME(mole fraction ratio is 1∶1) can reduce the activation energy more than the single activator at the same mixed ratio. The ignition characteristics of the ternary fuel show obviously different depending on the activator ratio and reaction conditions，where the higher hydrogen ratio of H2＋DME(mole fraction ratio is 2∶1) has a better ignition promotion effect under the lean-burn combustion conditions，and H2＋DME(mole fraction ratio is 1∶2) is more active under the fuel-rich conditions. © 2024 Chinese Society for Internal Combustion Engines. All rights reserved.
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页码：308 / 316
页数：8
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