CALCULATION AND DESIGN OF THE COMBUSTION CHAMBER OF A GAS TURBINE (SELECTED ARTICLES)

Basic descriptions and classifications are given of combustion chambers currently used in stationary gas turbine units manufactured in the Soviet Union. It is pointed out that in the Soviet Union, annular combustion chambers are not used in stationary gas turbines. The most commonly used combustion chambers are provided with fuel nozzle swirl cups, telescopic flame tubes, and various cooling modes. An analysis of published experimental results indicates that the combustion process in combustion chambers with a single swirl cup is satisfactory only when the flame tube diameter does not exceed a certain maximum magnitude. When the diameter exceeds 1000-1200 mm, the turbulence diminishes suddenly, resulting in a flame lag and a reduction in combustion efficiency. For this reason, large combustion chambers are provided with multiple swirl cups. Chambers are usually equipped with either three or five swirl cups. Very intensive combustion of liquid fuel was noted in chambers provided with five swirl cups. Combustion chamber parameters and designations of Soviet stationary gas turbines are presented in tabulated form. (Author) Edited machine trans. of Tsentralnyi Nauchno-Issledovatelskii i Proektno-Konstruktorskii Kotloturbinnyi Institut. Trudy (USSR) n75 p15-37, 138-147 1967.