Abstract
As the global concern with the fossil fuel, energy and environment, and the strong desire for a lighter and longer-lasting electronics are growing, premixed combustion in micro- and meso-scale channels resurges as an important research field. In this chapter, we provide an overview of our recent researches on the dynamic interaction between a premixed flame and acoustic/flow disturbances in a tubular swirl meso-scale combustor. Under certain conditions, the dynamic interaction between the swirl flame and oncoming flow leads to self-excited thermoacoustic instability at high frequency (approximately 2000Hz). The flame is dancing/oscillating. To enhance the flame stability, porous media (PM) could be applied. Experimental studies on a meso-combustor with liquid n-heptane fueled and PM inserted are then conducted. Finally, a 3D modeled CH4/NH3-fueled micro-combustor is developed by using OPENFOAM to examine its thermal performances and NOx emissions. The model has great potential to be applied as a numerical design tool.
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