METHOD FOR DIAGNOSTICS OF VIBRATING COMBUSTION IN COMBUSTION CHAMBER OF GAS TURBINE ENGINE

摘要

FIELD: engines and pumps.;SUBSTANCE: method for diagnostics of vibrating combustion in combustion chamber of gas turbine engine comprises preliminary determination of frequencies of natural oscillations of combustion chamber portions and the diagnostic modes, at the same time the pressure pulsation in the combustion chamber is measured simultaneously with body vibration, the amplitude-frequency spectra are built when vibrations and pulsations appear in the spectra at one of the diagnosis modes to constitute frequency that is aliquant the rotational speed of the rotor, at that at the base it is fuzzy, thereby the conclusion on the presence of vibrating combustion in the combustion chamber is made.;EFFECT: extended utilisation area and enhanced reliability of the diagnostics method due to direct measurement of oscillatory process parameters in the turbine engine combustion chamber regardless its type and the type of vibrating combustion without necessity to perform additional engine start.;3 dwg