Effect of equivalence ratio and mixing time on combustion of ammonia/oxygen/argon mixture using a constant volume combustion chamber with sub-chamber
Effect of equivalence ratio and mixing time on combustion of ammonia/oxygen/argon mixture using a constant volume combustion chamber with sub-chamber
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DOI：
10.1007/s12206-023-0645-9
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发表时间：
2023-06
影响因子：
1.6
通讯作者：
B. Guo;M. Ichiyanagi;T. Ohashi;Qinyue Zheng;Takashi Suzuki
中科院分区：
文献类型：
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作者：
B. Guo;M. Ichiyanagi;T. Ohashi;Qinyue Zheng;Takashi Suzuki
氨由于其无碳的分子结构而作为燃料受到了极大的关注。然而，燃烧氨是具有挑战性的，因为它的层流燃烧速度低。为了提高燃烧速度，作者提出了一种带副燃烧室的定容燃烧室。研究了氨/氧/氩混合气的混合时间和当量比对燃烧的影响。从副燃烧室喷出的平均速度可以通过评估燃烧压力、燃烧质量分数和燃烧体积分数来计算。结果表明，采用副燃烧室结构后，副燃烧室的引射增强了主燃烧室未燃气体的压缩和湍流，提高了氨燃烧的平均火焰速度。合适的电热塞温度可以改善燃料混合物的可燃性，从而提高燃烧效率、最大燃烧压力和缩短燃烧时间。
Ammonia has received significant attention as a fuel due to its carbon-free molecular structure. However, burning ammonia is challenging because of its low laminar burning velocity. To promote the combustion velocity, the authors propose a constant volume combustion chamber with a sub-chamber. This study investigated the effects of the mixing time and equivalence ratio of the ammonia/oxygen/argon mixture on combustion. The mean velocity of the ejection from the sub-chamber can be calculated by evaluating the combustion pressure, mass fraction burned, and volume fraction burned. It was clarified that with the sub-chamber structure, the ejection from the sub-chamber improved the compression and turbulence of unburned gas in the main chamber and increased the mean flame velocity of ammonia combustion. The appropriate glow plug temperature could improve the ignitability of the fuel mixture, leading to increased combustion efficiency, maximum combustion pressure, and reduced combustion time.