The flame propagation characteristics and detonation parameters of ammonia/oxygen in a large-scale horizontal tube: As a carbon-free fuel and hydrogen-energy carrier
The flame propagation characteristics and detonation parameters of ammonia/oxygen in a large-scale horizontal tube: As a carbon-free fuel and hydrogen-energy carrier
复制标题
大型水平管中氨/氧的火焰传播特性和爆轰参数：作为无碳燃料和氢能载体
DOI：
10.1016/j.ijhydene.2021.03.032
复制
发表时间：
2021-05-12
影响因子：
7.2
通讯作者：
Liu, Changqi
中科院分区：
文献类型：
--
作者：
Jing, Qi;Huang, Jinxiang;Liu, Changqi
作为一种无碳燃料和氢能载体，氨是未来能源利用的潜在候选者。因此，为了促进氨在爆震发动机中的应用并评估氨相关工业过程的安全性，在大型水平管中开展了不同ERs的氨/氧混合物的DDT实验。此外，采用压力传感器和自行开发的温度传感器来记录DDT过程中的超压和瞬时火焰温度。结果表明，氨/氧混合物中的DDT过程包含四个阶段：慢速传播阶段、火焰和压力波加速阶段、快速传播和爆震波形成阶段、爆震波自持传播阶段。对于化学计量的氨/氧混合物，火焰锋和引导激波以不同的速度依次传播，直到它们紧密耦合并以稳定的速度一起传播。同时，发现一种有趣的共振波向后传播。自持爆的峰值超压、爆速和火焰温度分别为2 MPa、2000 m/s和3500 K。随着ER从0.6增加到1.6，爆速和峰值超压分别为2310 m/s到2480 m/s和25.6 bar-28.7 bar。此外，将氨的爆轰参数与甲烷和氢气的爆轰参数进行了比较，以评价氨的爆轰性能和破坏力。 (c) 2021 氢能源出版物有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
As a carbon-free fuel and a hydrogen-energy carrier, ammonia is a potential candidate for future energy utilization. Therefore, in order to promote the application of ammonia in detonation engines and to evaluate the safety of ammonia related industrial process, DDT experiments for ammonia/oxygen mixtures with different ERs were carried out in a largescale horizontal tube. Moreover, pressure transducers and self-developed temperature sensors were applied to record the overpressure and the instantaneous flame temperature during DDT process. The results show that the DDT process in ammonia/oxygen mixtures contains four stages: Slow propagation stage, Flame and pressure wave acceleration stage, Fast propagation and detonation wave formation stage, Detonation wave self-sustained propagation stage. For stoichiometric ammonia/oxygen mixtures, flame front and the leading shock wave propagate one after another with different velocity, until they closely coupled and propagated together with one steady velocity. At the same time, it is found that an interesting retonation wave propagates backward. The peak overpressure, detonation velocity, and flame temperature of the self-sustained detonation are 2 MPa, 2000 m/s and 3500 K, respectively. With the ER increased from 0.6 to 1.6, the detonation velocities and peak overpressures ranged from 2310 m/s to 2480 m/s and 25.6 bar-28.7 bar, respectively. In addition, the detonation parameters of ammonia were compared with those of methane and hydrogen to evaluate the detonation performance and destructiveness of ammonia. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.