Исследование энергетических характеристик плазменного генератора для стабилизации термо-акустических процессов в камерах сгорания

Abstract

Статья посвящена вопросу стабилизации термо-акустических процессов в камерах сгорания газотурбинных двигателей использованием плазмотрона постоянного тока. Представлены результаты экспериментальных исследований плазмотрона постоянного тока, предназначенного для подавления акустической неустойчивости в камерах сгорания. Получена вольт-амперная характеристика плазменного генератора для различных расходов плазмообразующего воздуха. Определена зона устойчивого горения дуги плазмотрона для стабилизации термо-акустических процессов в камерах сгорания.

The use of the advanced plasmachemical stabilizers to reject ripple processes in the combustion chamber caused by the structural peculiarities of flame tubes and the aerodynamic interaction of the compressor, combustion chamber and the turbines is under the discussion. The objective of this research was to determine the range of the stable operation and volt-ampere characteristics of the dc plasmatron intended for the suppression of the acoustic instability in the combustion chambers of gas turbine engines. Experimental investigations of the plasma generator intended for the ripple rejection and the improvement of the stable operation of the low-emission combustion chamber of the gas turbine engine were carried out. The data of the experimental investigations of dc plasmatron intended to the suppression of acoustic instability in the combustion chambers of gas turbine engines were given. The volt-ampere characteristic of the plasma generator for different flow rates of plasma-forming air has been given. The range of the stable operation of the dc plasmatron intended for the stabilization of the thermoacoustic processes in combustion chambers has been defined. The use of the plasma generator in the low emission combustion chamber with the preliminary mixing of the air- fuel mixture as a stabilizer of thermoacoustic processes results in a decrease of the pulsations of the air-fuel mixture, which results in a decrease of the vibration of combustion chamber elements and the engine on the whole.