New progress in research on pneumatic testing of wind turbine blades in the Institute of Engineering Thermophysics
In recent years, with the development of large-scale wind turbine blades, the problem of air ammunition in the blades has been highlighted. The traditional wind tunnel test method can no longer meet the requirements for aerodynamic testing. Therefore, there is an urgent need to develop a pneumatic performance test that can be performed on real prototype wind turbine blades. method. The surface pressure measurement technique can obtain the details of the local aerodynamic force distribution and can also be integrated to obtain the overall aerodynamic force, which is the most widely used in the aerodynamic performance test.
However, the real wind turbine blade is a large curved surface part of a composite material. On the one hand, the pressure measurement guide hole cannot be machined during the vacuum suction molding process. On the other hand, the pressure measurement guide hole cannot be machined in the same reference coordinate system after molding. Inaccurate positioning, there is still a lack of an effective method for the production of pressure holes on the surface of composite wind turbine blades.
In response to the limitations of the existing technology, the researchers of the National Energy Wind Blade Research and Development (Experimental) Center of the Institute of Engineering Thermophysics, Chinese Academy of Sciences, adopted the vacuum suction preparation process for composite wind turbine blades as a starting point, combined with pneumatic testing requirements, and proposed vacuum-based suction. The wind turbine blade pneumatic pressure tube embedded process. After many tests, the process has become more mature and preliminary standardized. As of now, researchers have successfully produced composite panels that meet the pneumatic test requirements and are reproducible. The process will be subsequently applied to the suction molding process of real blades to solve the key technical problems of the pneumatic field test system for wind power blades.
Relevant research results have applied for 2 national invention patents, and have been included in the SAMPE China 2015 Conference on Performance Evaluation and Engineering Applications of Wind Blade Composite Materials.
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