Gas tube combustor, Swirl, Lean premixed combustion
Gas tube combustor
The invention provides a passive method of mitigating high-amplitude, discrete-frequency, self-sustaining pressure oscillations within a certain window of operating conditions for a swirl stabilized combustor operating in the lean premixed mode. In the current design, fuel and air are mixed upstream of a choke plate, and the flow passes through a swirler before passing through a sudden expansion into the main combustion chamber. Swirl stabilization reduces the extent of the flame, measured along the longitudinal axis, compared to a bluff-body or expansion stabilized flame, allowing for the design of more compact combustors. Lean premixed combustion allows for a significant reduction in NOx emissions, making cleaner, more environmentally friendly combustors feasible.
U.S. Patent Application Number 12/941177, filed on November 8, 2010
Last revised: April 29, 2013
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