Currently, demands for alternative energies have been increasing in step with fossil fuel depletion and climate change. With the increasing usage of coal-based syngases and biomass, in situ measuring of laminar burning velocities of various combustibl...
Currently, demands for alternative energies have been increasing in step with fossil fuel depletion and climate change. With the increasing usage of coal-based syngases and biomass, in situ measuring of laminar burning velocities of various combustible fuels is essential in practical fields. This study experimentally investigated a new measuring method using an annular diverging channel. Burning velocities of methane, propane and DME were measured and the results were compared with that of a flat flame burner. The increase of the cross-sectional area of the annular diverging channel in the flow direction helps hydrodynamic flame stabilization, and the burning velocity can be assessed directly from the flame location. Consequently, the estimated burning velocities using the annular diverging channel were well agreed to those evaluated using a flat flame burner, and all results were also showed good agreement with the results from other literatures.