The Effect of Hydrogen Addition on the Acoustic Response of a Partially Premixed Counterflow Flame

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Akhtardanesh Mohammad Ali; Hosseinkhani Mohammad Javad; Farshchi Mohammad

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Journal Paper

Paper Information

Journal: FUEL AND COMBUSTION Year:2023 | Volume:16 | Issue:4 Page(s): 43-60

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Information Journal Paper

Title

The Effect of Hydrogen Addition on the Acoustic Response of a Partially Premixed Counterflow Flame

Author(s)

Akhtardanesh Mohammad Ali | Hosseinkhani Mohammad Javad | Farshchi Mohammad | Issue Writer Certificate

Keywords

Flame response

hydrogen

Partially Premixed

Acoustic

Combustion instability

Abstract

Hydrogen plays a key role in reducing reliance on fossil fuels in various energy production systems. While its use offers a promising alternative to carbon-based fuels, it presents significant challenges. The transition from carbon-rich hydrocarbons to hydrogen-based energy systems requires a thorough understanding of its dynamic effects. This study investigates the impact of hydrogen addition on the dynamic behavior of a partially premixed methane-air counterflow flame through experimental analysis and one-dimensional numerical simulations. The study examines the steady-state flame structure and response without acoustic excitation, assessing the influence of added hydrogen on the flame's heat release rate and thermal region thickness. Employing an acoustically excitable counterflow flame burner setup, the effects of increasing hydrogen content on methane-air flames are explored, and their dynamic response is analyzed using the CH* radical chemiluminescence method. The findings reveal that while hydrogen addition reduces the intensity of CH* radical emission in the absence of acoustic excitation, exposure to acoustic waves amplifies oscillations in the heat release rate and CH* radical emission intensity. This underscores the enhanced flame response function with hydrogen addition.

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