ВЫБОР УГЛА УСТАНОВКИ ЛОПАТОК ЗАВИХРИТЕЛЯ И ДИАМЕТРА ОТВЕРСТИЙ СМЕШЕНИЯ ЖАРОВОЙ ТРУБЫ КАМЕРЫ СГОРАНИЯ НА ОСНОВАНИИ ЧИСЛЕННОГО МОДЕЛИРОВАНИЯ ПРОЦЕССОВ ГОРЕНИЯ

Abstract

One of the most important tasks at the design stage of the combustion chamber is to determine its environmental characteristics. There are several methods for determining the degree of influence of factors on the characteristics of combustion chamber, one of which is the three-dimensional modeling of processes in the combustion chamber. The factors are divided into constructive and regime ones. In this paper, the influence of structural design parameters of the front device and the flame tube on the characteristics of the combustion chamber is considered. The studies were carried out on a three-dimensional model of the combustion chamber of the gas turbine power plant; methane gas was used as the fuel. To study the effect of the geometry of the axial swirler on the pollutant emission, two variants of the swirler’s angle are chosen: w= 55° and w = 45°. In order to take into account the effect of the amount of air drawn into the combustion zone, geometric models are constructed with a different diameter of the dilution holes in the range from 0 to 7 mm. As a result, the recommended parameters of the front device elements are determined: 1) the recommended swirler’s angle b = 55 °; 2) the recommended range of dilution holes of the liner is d = 3 ... 4 mm. The results obtained in this paper are based on a series of calculations of combustion processes in a three-dimensional stationary formulation.