Method for analyzing fluid dynamics and structural mechanics of wind generator blades

Abstract

The invention discloses a method for analyzing fluid dynamics and structural mechanics of wind generator blades, which comprises the following steps: combining CFD and CAE methods, determining each parameter of an impeller model by adopting the momentum blade element theory, designing an entity model of the blade, establishing a three-dimensional model of a windmill blade, a hub and a peripheral wind site based on a Gambit software platform, meshing the model by adopting a partial structuring method, setting a proper boundary condition, calculating the performance of a finite element based on a Fluent software platform, extracting the blade torsion and calculating the blade power and the blade efficiency, establishing a blade structural model based on an ansys software platform and meshing the blade structural model, applying load and restraint condition to the blade structural model, analyzing the mode of the blade structure, performing equal torque treatment for pressure distribution acquired by the Fluent software platform, applying pressure surface load to the ansys software platform, calculating the structural mechanics characteristics of the wind generator blades, and extracting blade deformation and stress distribution characteristics.

Description

technical field [0001] The invention belongs to the field of fluid dynamics and structural mechanics, and relates to a method for analyzing the fluid dynamics and structural mechanics of wind turbine blades, in particular to a method for designing blade entities using the momentum blade element theory, establishing a model based on the Gambit software platform, and based on Fluent The software platform calculates the hydrodynamic performance, and combines with the ANSYS software platform to further analyze the structural mechanical characteristics of the blade body. Background technique [0002] At present, the development and utilization of renewable energy, especially wind energy, has been highly valued by countries all over the world. Wind energy is a kind of clean energy. It is caused by the uneven heating of the earth's surface atmosphere caused by solar radiation, which causes the difference in atmospheric pressure. Its essence is a manifestation of solar energy. [0...

AI Technical Summary

Problems solved by technology

[0008] But there are still the following deficiencies: ① At present, more is still the momentum-blade element theory analysis of wind turbine blades, which is not accurate enough to describe the aerodynamic characteristics of wind turbine blades

In the development process of wind turbines, there are still many problems that have not been resolved. For example, the main problems related to aerodynamic design are the characteristics of wind rotor airfoil, static stall, dynamic stall, tip loss, etc. Solving these problems is very important for improving the efficiency of wind turbines. very important

[0009] ② The hydrodynamic analysis of the blade is not combined with the structural mechanics analysis to analyze the characteristics of the wind turbine blade body structure and the surrounding flow field

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