2024-03-29T14:04:48Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00024788
2023-01-16T04:13:47Z
320:321:322
Numerical study on laminar burning velocity and ignition delay time of ammonia flame with hydrogen addition
Li, Jun
73694
Huang, Hongyu
73695
Kobayashi, Noriyuki
73696
Wang, Chenguang
73697
Yuan, Haoran
73698
Laminar burning velocity
Ignition delay time
Ammonia flame
Hydrogen addition
his study focuses on the application of NH3 as a carbon-free alternative fuel in internal combustion devices. The two key parameters for fuel combustion, namely, laminar burning velocity and ignition delay time of the NH3 flame at various H2 blending levels, are numerically investigated. Results show that the selected modified Dagaut-Kéromnès mechanism is acceptable and repeatable for calculating the burning velocity and ignition delay time of NH3-air flame at various H2 addition conditions. H2 addition increases the reactivity of NH3 combustion at all conditions and enhances the burning velocity. This enhancement is mainly due to chemical effect caused by the reduction in chemical activation energy and the transport effect resulting from the high mobility of H2. Furthermore, an increase in pressure and H2 addition ratios can significantly decrease the ignition delay time of NH3 mixtures and promote NH3 ignition. The enhancement of H2 addition on NH3 ignition and laminar burning velocity is mainly attributed to the contribution of the three following reactions: O + H2 = OH + H, H + O2 = OH + O, and H2 + OH = H2O + H. These reactions can significantly increase the concentration of free radicals and accelerate the peak of radicals.
journal article
Elsevier
2017-05-01
application/pdf
ENERGY
126
796
809
http://doi.org/10.1016/j.energy.2017.03.085
http://hdl.handle.net/2237/27010
0360-5442
https://nagoya.repo.nii.ac.jp/record/24788/files/Numerical_study_on_laminar_burning_velocity_and_ignition_delay_time_of_ammonia_flame_with_hydrogen_addition.pdf
eng
https://doi.org/10.1016/j.energy.2017.03.085
© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/