Turbine blade of blade top rib wing structure

Abstract

The invention belongs to a turbine blade of a blade top rib wing structure, and particularly relates to a novel turbine movable blade top structure. The turbine blade of the blade top rib wing structure comprises a blade pressure surface side small wing and a blade suction force side small wing, wherein a cavity in the middle of the blade top is formed between the blade pressure surface side small wing and the blade suction force side small wing. A front edge approaching point is formed in the blade front edge position of the blade pressure surface side small wing, and a rear edge point is formed in the blade front edge position of the blade pressure surface side small wing. A front edge approaching point is formed in the suction force surface front edge position of the blade suction force side small wing, and a rear edge point is formed in the blade front edge position of the blade pressure surface side small wing. The maximum width of the suction force side small wing is between C and D. The turbine blade of the blade top rib wing structure has the advantages that through the special geometrical shape, flow around the blade top is controlled, and accordingly the leaking flow of the blade top is lowered, the efficiency of a turbine is improved, and the output power of the turbine is increased; in addition, the heat transfer performance of the blade top of the turbine is improved, and the service life of the turbine is prolonged.

Description

technical field [0001] The invention belongs to a turbine rotor blade of a gas turbine engine, and in particular relates to a design method, structure and device of a blade top of a turbine rotor blade. Background technique [0002] The core of a modern gas turbine engine consists of three main components: the compressor, the combustor, and the turbine. When the airflow flows through the compressor, it is compressed into high-pressure gas, and then mixed with fuel oil in the combustion chamber to become high-temperature and high-pressure gas. When the gas flows through the turbine, it does work on the turbine, driving the turbine rotor to rotate, and the turbine drives the compressor. [0003] A turbine rotor blade typically includes a leading edge, a pressure face, a suction face, a trailing edge, and a tip. In the turbine rotor, in order to prevent friction between the turbine blade tip and the outer casing wall, a certain gap is left between them. Driven by the pressure...

AI Technical Summary

Problems solved by technology

[0006] In fact, in addition to the tip leakage vortex, the flow near the blade tip also includes scraping vortex and channel vortex, among which these vortex structures are the cause of flow loss and reduced turbine efficiency

[0007] The fluid in the high-pressure turbine is high-temperature gas, which causes thermal corrosion and oxidation of the tip of the blade and reduces the life of the engine. In addition to the tip leakage vortex, the scraping vortex and channel vortex will reduce the heat transfer performance of the local area of ​​​​the tip of the blade.

Images