초록 ▼

A method and a device for acoustic modulation of a flame through the use of an acoustically modulated feeding of a fuel. The flame is produced by burning the fuel in a hybrid burner including a premixing burner and a pilot burner associated with the latter. The fuel is fed to the premixing burner in

A method and a device for acoustic modulation of a flame through the use of an acoustically modulated feeding of a fuel. The flame is produced by burning the fuel in a hybrid burner including a premixing burner and a pilot burner associated with the latter. The fuel is fed to the premixing burner in a main flow and to the pilot burner in a pilot flow. The pilot flow is modulated and the main flow is not modulated. The invention is of particular interest for suppressing combustion oscillations in a combustion chamber to which the hybrid burner is connected.

대표청구항 ▼

[We claim:] [1.]producing a flame in a combustion chamber in which acoustic oscillations prevail, by burning a fuel with a hybrid burner having a premixing burner and a pilot burner associated with the premixing burner;feeding the fuel to the premixing burner in an unmodulated main flow and to the p

[We claim:] [1.]producing a flame in a combustion chamber in which acoustic oscillations prevail, by burning a fuel with a hybrid burner having a premixing burner and a pilot burner associated with the premixing burner;feeding the fuel to the premixing burner in an unmodulated main flow and to the pilot burner in a modulated pilot flow;generating a sensor signal truly reproducing the acoustic oscillations;phase-shifting the sensor signal to produce a modulation signal modulating the pilot flow; andeffecting negative feedback to the acoustic oscillations in the combustion chamber with the flame by adjusting said phase-shifting.