A method for making aeroelastic wind tunnel test model of wind turbine blade

Abstract

The invention discloses a method for making an aeroelastic wind tunnel test model of a wind turbine blade, including a reasonable simplification similarity criterion for aeroelastic model of a wind turbine blade, a design method for the equivalent section of the aeroelastic model, and a method for making a frame segment / coat of the aeroelastic model. Firstly, based on kinematic equivalence, a reasonable simplification similarity criterion for the aeroelastic model of wind turbine blades is derived. Then, the variational asymptotic equivalent section method is proposed to design a high-precision equivalent wind turbine blade model with special-shaped section, and realize the aero-stiffness-mass of the blade aeroelastic model. Scale-mapped aero-elastic model design; finally, relying on high-precision 3D printing to obtain the aero-elastic model frame segment, and then splicing the full-length model through the connecting ribs at a single point, filling the hollow area with balsa wood chips to polish the coat, pasting the weighted lead sheet on the trailing edge, and the front Edge paste rough strips and gap filling sponge to complete the inflatable model frame segment / outer garment. The invention supplements the deficiencies of the existing domestic and foreign wind turbine blade aeroelastic model design and manufacture methods.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a method for making aeroelastic wind tunnel test models of wind turbine blades. Background technique [0002] With the development of ultra-high power of today's wind turbines, the trend of ultra-long, flexible and thin wind turbine blades is significant. The resulting structural / aerodynamic dual nonlinearity leads to a prominent problem of aeroelastic wind vibration of blades, and related wind turbine blade wind damage events also occur repeatedly. Aeroelastic wind tunnel test is an effective way to study the strong nonlinear aeroelastic motion mechanism and modal energy accumulation characteristics. It is an important method recognized as feasible and effective in the existing wind engineering field. It has been maturely applied in individual special structures. However, wind turbine blades are limited by their gradient continuous airfoil, integrated stre...

AI Technical Summary

Problems solved by technology

At present, there are three methods of designing and making models for aeroelastic wind tunnel tests: single-degree-of-freedom, multi-degree-of-freedom, and continuous aeroelastic. The existing methods for making aeroelastic models with different structures are quite different, and there is no recognized aeroelastic model yet. The production method can take into account the simplicity, accuracy and versatility of model production

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