Blade, shaping method thereof and turbine

Abstract

The invention relates to the technical field of blade shaping, in particular to a blade, a shaping method thereof and a turbine. The blade comprises blade profile segments at different radius positions. All the blade profile segments are connected in series along a stacking line according to the radius positions. The stacking line penetrates through centers of gravity of all the blade profile segments. The stacking line comprises n bend segments which are connected in series. Each bend segment comprises a first bend and a second bend which are connected in series. Bending directions of the first bends and the second bends are opposite, and n is larger than or equal to 1. Bending directions of two bends connected between every two adjacent bend segments are opposite. According to the bladeand the shaping method thereof, the stacking line is designed to be series-connection of multiple bend segments; each bend segment is connected in series, and a fluctuant structure is formed; multiplefluctuations are formed in the whole stacking line; and a concave-convex structure is naturally constructed in the front edge of the blade acquired after the blade profile segments are stacked alongthe stacking line. According to the blade and the shaping method thereof, under the premise that the blade profile of the blade is not changed, fluctuation of the stacking line is utilized to construct the concave-convex structure of the front edge of the blade; and the good hydrodynamic property of the blade under a big angle of attack is improved.

Description

technical field [0001] The invention relates to the technical field of blade molding, in particular to a blade, a molding method thereof, and a turbine. Background technique [0002] Gas turbines are major technical equipment to achieve efficient and clean conversion of energy and ensure national energy security, including aeroengines, gas turbines for ships or power generation, etc. A gas turbine consists of three parts: a compressor, a combustor and a turbine. In a gas turbine engine, the compressor uses high-speed rotating blades to work on the air to increase the air pressure. A turbine is a machine that converts the energy contained in a fluid medium into mechanical work, also known as a turbine. The air entering from the intake device is compressed in the compressor, enters the combustion chamber and is mixed with the injected fuel for combustion to generate high-temperature and high-pressure gas. The gas drives high-speed rotation during the expansion process, conv...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the good hydrodynamic characteristics of the blade at a large angle of attack, such as image 3 As shown in Fig. 1, a bump is added to the leading edge of the blade, but this kind of blade is difficult to apply in the compressor. The blade shape used in the actual design of the compressor is a mature specification formed through a large number of experiments.

If bumps are added, the shape of the compressor airfoil will be changed, resulting in unpredictable consequences

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