A Design Method of Rotation Angle Law of Transducer Vane in Axial Flow Compressor of Marine Gas Turbine under Low Operating Conditions

Abstract

The purpose of the present invention is to provide a method for designing the rotation angle law of steerable guide vanes under low working conditions of a marine gas turbine axial flow compressor, extracting the aerodynamic parameters at the characteristic cross-section positions of the adjacent rear discharge vanes of each row of steerable guide vanes of the compressor, and decompressing the compressor The reduced rotating speed under low working conditions and the reduced rotating speed at the design point are used to calculate the peripheral speed of the moving blades; a reduced flow value is set to calculate the axial speed of the inlet of each row of moving blades; given the expected inlet angle of attack of the moving blades of the next stage, each After the row of steerable guide vanes rotates, the relative airflow angle of the inlet of the next stage of the bucket is calculated, and the rotation angle of each row of steerable guide vanes is obtained, and the rotation angle law of the compressor steerable guide vane at different reduced rotational speeds is obtained. The invention can quickly obtain an ideal law of joint regulation and control of multiple rows of transductable guide vanes, effectively reduces resource and time consumption in the design process, simplifies the workload of designers, and can effectively improve the compressor under low working conditions. The surge margin index is very suitable for engineering design applications.

Description

technical field [0001] The invention relates to a design method of a gas turbine, in particular to a design method of a ship gas turbine compressor. Background technique [0002] As one of the three most important core components of a marine gas turbine, the compressor's technical performance and reliability directly affect the realization of the safety and economic indicators of a marine gas turbine. In order to adapt to the technical and tactical requirements during the ship's navigation, the ship's gas turbine must be able to operate efficiently with a margin under low working conditions while ensuring the performance of the design point. The operating characteristics under such a wide range of variable working conditions make the stability of gas turbines in low working conditions very prominent when they are used as propulsion or power generation in ship power systems, and often become the limiting bottleneck of unit performance, which has great impact on ship gas turbi...

AI Technical Summary

Problems solved by technology

At the same time, with the gradual increase in the number of transducible lobe rows and the increasingly flexible control methods of transducible lobe, the number of angle combination schemes between multi-row transducible lobes has increased sharply, which gives the compressor multi-row transducible lobe The design of joint regulation and rotation angle law brings more difficulties and challenges

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