Turbine blade and gas turbine containing same

Abstract

The invention discloses a turbine blade and a gas turbine containing the same. The turbine blade is internally provided with cooling channels. The turbine blade comprises partition plates and flow deflectors. The partition plates are arranged in the cooling channels inside the turbine blade and used for enabling the cooling channels to be of a serpentine channel cooling structure. The portions, atthe tail ends of the partition plates, of the cooling channels are defined as turning areas. The flow deflectors are arranged in the turning areas in the cooling channels and used for dividing cooling air in the turning areas into three or more streams. By means of the turbine blade and the gas turbine containing the same, under the circumstance that the total amount of the cooling air is not increased, flowing of the cooling air in the serpentine channel turning areas is controlled more precisely, and the cooling air can be distributed on channel cross sections of the turning areas more reasonably and more controllable; and thus, the pressure loss of the cooling air in the turning areas of the cooling channels of the blade is reduced, and the bulk temperature distribution and thermal stress level of the blade are improved.

Description

technical field [0001] The invention relates to the technical field of gas turbine design, in particular to a turbine blade and a gas turbine including the same. Background technique [0002] With the gradual improvement of gas turbine users' economic requirements, the environmental protection department has further strengthened the emission requirements of gas turbines, and the pressure ratio and combustion temperature of gas turbines have gradually increased. The higher the challenge. In order to ensure the safe and reliable operation of turbine blades, complex cooling design is required to keep the temperature and stress distribution of the blade body at a reasonable level. [0003] In the cooling design process of turbine blades, the serpentine channel cooling structure is often used as the carrier of cooling methods such as convection cooling and film cooling. Through the serpentine channel structure, the cooling structure can be continuously arranged inside the blade...

AI Technical Summary

Problems solved by technology

However, in the turning area of ​​the cooling structure of the serpentine channel, due to the low Reynolds number effect, the viscous effect of the cooling air is strong, and the boundary layer of the cooling air is very thick and easy to separate. Uniform, forming a stronger secondary vortex flow, resulting in a sharp loss of cooling air pressure and a reduction in heat transfer effect

In the existing known technology, the pressure loss is often reduced by setting a deflector structure in this area, but the effect is often not ideal

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