Method of controlling a combustion flame
AssigneeCentre National de la Recherche Scientifique (CNRS)
InventorClaude Bertrand
Life of this patent
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Abstract
This invention relates to combustion control. It preferably uses a microphonic probe. Within a water circulation enclosure, a probe head defines a thin channel joining a cavity to a furnace, the cavity being closed by a diaphragm arranged as an acoustic transducer. The acoustic pressure which is detected is connected to the combustion characteristics. The invention is used in particular for turbulent premixture flames.
Claims5
A method of optimally controlling the combustion of a mixture of pressurized components which provides a turbulent flame substantially exclusively by the acoustic noise level of the flame, comprising the steps of detecting the noise level across a frequency band between approximately 350 to 700 Hertz, converting said noise level to an acoustic pressure signal, generating a control signal representing the flow rate of one of said components, taking the ratio of said acoustic pressure signal to said control signal, using said ratio as a pilot signal, and adjusting the flow rate of one of said components to a level that adjusts the pilot signal to a maximum predetermined amplitude.
Dependencies are inferred from the claim text.