Impact of Ammonia Content on Explosion of Methane‒Air Premixed Gas Duct with Varying Equivalence Ratios.
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| Title: | Impact of Ammonia Content on Explosion of Methane‒Air Premixed Gas Duct with Varying Equivalence Ratios. |
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| Authors: | Wang, Quan, Zhu, Wenyan, Yang, Rui, Yang, Yaoyong, Li, Rui, Ge, Yu, Feng, Dingyu, Xu, Jianshe |
| Source: | Flow, Turbulence & Combustion; Aug2025, Vol. 115 Issue 2, p763-780, 18p |
| Abstract: | In this study, a duct explosion experiment with an ammonia-methane-air mixture was conducted using a custom-built stainless steel flame acceleration duct (D = 120 mm, L/D = 45.8). The effects of varying ammonia concentrations (φ = 0%, 10%, 20%, 30%) and equivalence ratios (Φ = 0.9, 1.0, 1.1) on flame behavior were examined. The key aspects analyzed included the evolution of the explosion overpressure within the duct and the average propagation velocity of the deflagration flames. The results show that ammonia reduces the brightness of methane-air deflagration flames and that this reduction becomes more pronounced as the ammonia concentration (φ) increases, and the pressure‒time histories inside the duct have a three-peak structure (P |
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| Database: | Complementary Index |
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