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Axial flow turbine mechanical blade parameterization method applicable to bending, twisting and sweeping

A turbomachinery, parametric technology, applied in the direction of mechanical equipment, blade support components, engine components, etc.

Active Publication Date: 2019-12-20
XI AN JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a parameterization method for axial flow turbomachinery blades that can be used for bending, twisting, and sweeping, at least solving the problem of parameterization of blades with geometric features such as bending, twisting, and sweeping in the existing axial flow blade parameter method, and Make the meaning of parameters as clear as possible to facilitate parameter optimization

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  • Axial flow turbine mechanical blade parameterization method applicable to bending, twisting and sweeping
  • Axial flow turbine mechanical blade parameterization method applicable to bending, twisting and sweeping

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[0074] The present invention will be further described in detail below in conjunction with the accompanying drawings. However, it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited only to the following content. Without departing from the above idea of ​​the present invention, various replacements or changes made according to common technical knowledge and customary means in this field shall be included in the scope of the present invention.

[0075] Such as figure 1 As shown, the key defining parameters of the airfoil section for a certain blade height include: leading edge radius R le , trailing edge radius R te , Axial chord length C x , tangential chord length C t , Inlet geometry angle β in , exit geometric angle β out , leading edge half-wedge angle ε in , trailing edge semi-wedge angle ε out . The axial chord length C of the blade x refers to the lateral distance between the front and rear frontal ...

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Abstract

The invention discloses an axial flow turbine mechanical blade parameterization method applicable to bending, twisting and sweeping. The method comprises the following steps: dividing a axial flow turbine mechanical blade into a plurality of blade sections along the blade height direction; determining independent blade profile parameters of each section; calculating key control point coordinates and a blade profile curve equation according to the blade profile parameters; determining a position of a leading edge point of each section blade profile and calculating coordinates of a plurality ofblade profile data points through the curve equation; determining an equation of a blade stacking line in the blade height direction by taking the leading edge point of each section blade profile as areference; obtaining space coordinate of the leading edge point of each section, carrying out coordinate transformation on each section blade profile coordinate data set by taking the leading edge points as references, and generating space coordinates of the section blade profiles; and combining the blade profile data of each section to form a complete axial flow turbine mechanical blade parameterization file. According to the method, various blade forms such as bending, twisting, sweeping and the like can be parameterized effectively, the application range is wide, the parameter significanceis clear to facilitate design and optimization of the blades, and the parameterization problem is solved for the research of the pneumatic performance.

Description

technical field [0001] The invention belongs to the technical field of steam turbine blade design, and in particular relates to a parameterization method of an axial flow turbine blade which can be used for bending, twisting and sweeping. Background technique [0002] Blades are the core components of turbomachinery such as steam turbines, and their design and optimization are important research directions in the industrial field. In recent years, with the rapid development of the national economy, turbomachinery needs blades with better performance. Due to the variability of the working conditions of axial flow turbines, the geometric characteristics of the blades are very complicated. Different types of blades have various forms such as bending, torsion, and sweeping. Parameterization is a necessary process for blade design and optimization. At present, the blade design and optimization process requires a set of accurate and convenient parameterization methods. The existi...

Claims

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Application Information

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IPC IPC(8): F01D5/14
CPCF01D5/141
Inventor 谢永慧马皎斌张荻
Owner XI AN JIAOTONG UNIV
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