Air Film Hole Channel Structure Based on Tesla Valve and Its Application in the Leading Edge of Turbine Blades

Abstract

The invention relates to a gas film hole channel structure based on a Tesla valve and its application on the leading edge of a turbine blade, belonging to the field of gas turbines; the gas film hole channel structure includes a Tesla valve channel and an outlet gas film hole, and the The Tesla valve channel adopts the structure of the Tesla valve, so that the cooling air flow is a one-way flow from the entrance to the outlet of the Tesla valve channel; a plurality of outlet air film holes are located at the outlet of the Tesla valve channel for The cooling gas is passed into the wall surface to be cooled, and the axial direction of the outlet gas film hole is parallel to the axial direction of the outlet of the Tesla valve channel. The present invention introduces a Tesla valve channel at the air film hole at the leading edge of the end wall of the stationary vane, and the geometric dimension of the Tesla valve channel matches the air film hole. Due to the introduction of the Tesla valve channel, not only the backflow of high-temperature airflow is significantly weakened, but also the end wall near the stagnation point of the leading edge of the vane and the suction surface of the vane can be cooled more fully and uniformly, thereby improving the cooling efficiency.

Description

technical field [0001] The invention belongs to the field of gas turbines, and in particular relates to a gas film hole channel structure based on a Tesla valve and its application on the leading edge of a turbine blade. Background technique [0002] As a device for converting and utilizing energy, gas turbines are widely used in aviation, ships, electric power and other fields. The gas turbine is in the harsh working environment of high temperature and high pressure. At the same time, due to environmental problems and energy requirements, the power and thermal efficiency of the gas turbine need to be continuously improved. These put forward stricter requirements for the design of the gas turbine. In order to cope with environmental pollution and energy demand, during the process of gas turbine R&D and design, the thermal efficiency of the gas turbine is improved by continuously increasing the inlet gas temperature. At present, the inlet temperature of the high-pressure turb...

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Problems solved by technology

[0008] In order to avoid the deficiencies of the prior art, aiming at the problem that the end wall of the gas turbine vane passage bears extremely high heat load and the conventional method cannot effectively cool the front edge of the vane and the end wall near the pressure surface side, the purpose of the present invention It is to propose a film hole channel structure based on the Tesla valve, which can improve the cooling efficiency of the end wall of the vane channel; according to the principle of the Tesla valve, the cooling jet loss from the film hole at the leading edge of the vane is reduced, The distribution is more uniform, which significantly improves the cooling efficiency of the front edge of the vane and the end wall near the pressure side to prolong the service life of the end wall near the vane, and also ensures that the end wall near the front edge of the vane can work safely and effectively

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