Single-tube combustor device of ground combustion gas turbine

Abstract

The invention provides a single-tube combustor device of a ground combustion gas turbine. The single-tube combustor device of the ground combustion gas turbine comprises a casing and a flame tube arranged in the casing. A natural gas inlet pipeline is arranged on the top of the flame tube in an externally connected mode. A first-stage beveling hole whirlcone and a second-stage radial whirlcone which are opposite in rotation direction are arranged in the neck position of the flame tube sequentially from top to bottom. The first-stage beveling hole whirlcone is of a circular truncated cone structure and provided with a through hole enabling the side wall and the bottom face to communicate. The two stages of whirlcones are each provided with a Venturi tube. An igniter assembly, a main combustion hole and a mixing hole are formed in the side wall of the flame tube sequentially from top to bottom. A plurality of tiny full-coverage air film cooling holes are formed in the surface of the flame tube. A pair of symmetrical air inlets are formed in the side wall of the casing, and a convergence outlet is formed in the tail of the flame tube. By arranging the two stages of whirlcones on the neck of the flame tube and arranging the main combustion hole, the mixing hole and the tiny cooling holes in the flame tube, reasonable distribution of a combustion flow field, outlet temperature and wall temperature and reasonable temperature rise of a combustor can be achieved, and the service life of the flame tube is prolonged.

Description

technical field [0001] The invention belongs to the field of ground gas turbines, and relates to a single-pipe combustion chamber of the ground gas turbine, which uses natural gas as fuel and has structures such as double-stage obliquely cut radial swirlers, main combustion holes, mixing holes, and wall surface cooling holes. Background technique [0002] Over the past ten years abroad and at home, the use value of ground gas turbines has been fully proven, and its application direction is promising. With the increasing energy consumption, distributed power has gradually gained attention. Distributed power supply has the advantages of not requiring long-distance power transmission and distribution equipment, utilizing energy nearby, conveniently realizing heat, electricity, and cooling triple production according to user requirements, and meeting the power and electricity demand of special application environments. The ground gas turbine is one of the most rapid, stable and...

AI Technical Summary

Problems solved by technology

However, the backflow combustor has the disadvantages of large cooling area of ​​the flame tube, additional pressure loss when turning, and asymmetric flow.

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