Effects of hydrogen addition on oblique detonations in methane–air mixtures

Xi, Xuechen; Tian, Cheng; Wang, Kuanliang

doi:10.1016/j.ijhydene.2021.12.195

Cited by 21 publications

(1 citation statement)

References 41 publications

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“…As mentioned above, there are a lot of studies on hydrogen as a blended fuel, but most of them have used relatively single syngas components [25][26][27][28], and studies on biomass syngas combustion were mostly focused on combustion in engines [29][30][31] or constant volume combustion bombs [11,15], which are different from the structure of the boiler. Therefore, a multi-component mechanism model is employed to study the hydrogen addition of biomass syngas combustion.…”

Section: Introductionmentioning

confidence: 99%

Effects of Hydrogen Addition on the Thermal Performance and Emissions of Biomass Syngas Combustion in a Horizontal Boiler

Suxing,

Yu,

et al. 2024

Energies

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Due to its low calorific value, abnormal phenomena such as incomplete combustion and flameout may occur during the combustion process of biomass syngas. The applicability of adding hydrogen can assist in the combustion of biomass syngas in boilers to overcome the above defects, and the effects need to be investigated. In this study, a multi-mechanism model is employed to numerically simulate the flow and combustion of a horizontal boiler burning biomass syngas. The reliability verification of the model is conducted by comparing it with the experimental results of combustion in a domestic boiler with biomass syngas. From the views of multi-fields and synergy, the effects of hydrogen addition on the thermal performance and emissions of biomass syngas are further expounded. Two scenarios are taken into consideration: hydrogen addition at a constant fuel volume flow rate and constant heat input. The result indicates that hydrogen addition significantly affects the multi-field synergy, which is advantageous for improving the heat transfer performance and combustion efficiency of biomass syngas. However, when the hydrogen addition ratio exceeds 20% at a constant fuel volume flow rate and 25% at constant heat input, its impact may be reduced. When the hydrogen content increases, the outlet temperature of the combustion chamber decreases, and pollutant emissions are effectively controlled. The turbulent kinetic energy at the reversal section decreases, and the uniformity of the flow field improves. These results provide certain guidance for the efficient utilization of biomass syngas and the operation of boilers burning biomass syngas.

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