Micro-rib and air film hole combined cooling structure for turbine guider end wall

Abstract

The invention discloses a micro-rib and air film hole combined cooling structure for a turbine guider end wall. The micro-rib and air film hole combined cooling structure comprises a micro-rib structure arranged on the guider end wall, wherein the micro-rib structure is positioned in a guider end wall channel at the downstream of an air film hole structure, and consists of multiple micro-ribs; and the micro-ribs are arranged according to a blade height section two-dimensional streamline distribution rule not disturbed by secondary currents in the guider channel. The micro-rib structure improves the problem of easy influence by complex incoming flow conditions on an external air film cooling structure of the turbine guider end wall, and effectively enhances the air film cooling effect of the end wall.

Description

technical field [0001] The invention belongs to the technical field of turbine blades of aero-engines and gas turbines, and in particular relates to a cooling structure for combining micro ribs and air film holes on the end wall of a turbine guide. Background technique [0002] As a key hot-end component of an aero-engine or a gas turbine, the turbine plays an important role in converting the thermal energy of the high-temperature gas at the exit of the combustor into mechanical energy. The most important heat-power conversion component in the turbine is the turbine blade, which works in a harsh environment of high temperature and high pressure. At present, the air intake temperature of high-pressure turbines of aero-engines is far higher than the temperature-resistant limit of turbine blades. Therefore, in order to ensure the safe and reliable operation of the turbine blades, the blades are arranged with a complex external film cooling structure and internal convective coo...

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Problems solved by technology

[0005] The object of the present invention is to overcome above-mentioned deficiencies in the prior art, provide a kind of cooling structure that is used for the combination of the micro-rib of the end wall of the turbine guider and the air film hole, it has improved the external air film cooling structure of the end wall of the turbine guider easily Problems affected by complex incoming flow conditions, that is, to increase the robustness of the cooling structure of the end wall of the turbine guide, and effectively strengthen the film cooling effect of the end wall

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