Miniature gas turbine combustion chamber

Abstract

The invention discloses a miniature gas turbine combustion chamber, which has an annular structure and mainly comprises a flame tube, an outer casing, an inner casing, a swirler and a fuel oil supply system. The flame tube is formed by welding an outer flame tube, a head end wall and an inner flame tube; the rear end of the flame tube is connected with a rear flange of the casing of the combustion chamber through a screw; the rear end of the outer casing is connected with the rear flange of the casing through a bolt; and a front flange of the casing is connected with the front end of the casing through a bolt. An inlet of the combustion chamber is welded on the front flange of the casing; air radially enters the inlet of the combustion chamber; the front end of the inner casing is fixed in a hole of the inlet of the combustion chamber; the swirler is welded on the head end wall; the fuel oil supply system is fixed on an outer ring of the inlet of the combustion chamber; a main combustion hole, a mixing hole and an air film cooling hole are formed on the flame tube; and an air film slot tongue is welded on the lower part of the air film cooling hole for guiding cooling airflow. A high-energy DC igniter is inserted into the flame tube for realizing ignition starting of the totally annular combustion chamber; and gas is discharged out of the combustion chamber radially under the guiding of a slope of the outer flame tube and a vertical section of the outer flame tube. The miniature gas turbine combustion chamber is applied to a miniature gas turbine. Because the gas at the outlet directly impacts a centripetal turbine, the axial distance of the miniature gas turbine can be shortened, and the space is fully utilized.

Description

technical field [0001] The invention relates to a combustion chamber of a gas turbine, in particular to an annular combustion chamber of a micro gas turbine. Background technique [0002] There are three typical types of combustors, which are single-tube combustors, ring-tube combustors and annular combustors. Single-tube combustors are relatively mature in technology due to their early application, less development time and funds, but independent Single-barreled flame barrels and single-barreled receivers result in long lengths and heavy weights and require cross-fired tubes. When a single-tube combustor is applied to a micro gas turbine, it needs to be installed outside the axis of the compressor and the turbine, and the air flow needs to turn several times, resulting in a large loss. The ring tube combustor puts multiple combustion chambers in a common casing, which is lighter and shorter than the single tube combustor, but it is not easy to match the air flow pattern, e...

AI Technical Summary

Problems solved by technology

For micro gas turbines using centripetal turbines, the disadvantages of these two combustors will be more

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