Gas-solid Flow Erosion Wear Behavior Of Key Materials Of The Wind Turbine

The fluid velocity through the material on the surface, at the relative movement,the contact member or equipment and the fluid surface appears significant damage;the damage is the result of erosion wear. Erosion has become a cause for the failure ofmany industrial productions of materials-. In the petroleum chemical industry,hydropower, thermal power, wind power and other industries, generally exists in twophase flow and multiphase flow erosion phenomenon, erosion and abrasioninteraction, resulting in components or equipment failure, causing economic losses.This paper in view of the development trend of global wind power and windpower development in China the status quo, according to the specific naturalconditions of Xinjiang area, erosion wear behavior of wind turbine blade materials inhigh sand, high corrosion and other harsh environment. Based on the jet theory,investigates the impact velocity, impact angle, particle size and other factors on theglass fiber reinforced resin matrix composite material erosion wear and failureprocess. And the particle velocities were measured, combined with fluent software,the gas-solid two-phase jet flow and erosion wear is studied by numerical simulation.The results of the study are as follows:(1) using a vacuum bag molding process, preparation of glass fiber reinforced resinmatrix composites, tensile test, the average tensile strength of6layers and12layersof glass fiber layer are respectively500MPa and580MPa; Surface analysis results,effective bearing number of fibers along the loading direction, its tensile strength isgreater.(2) the erosion wear test results show:a) Glass fiber composite material erosion rate with decreasing particle sizeincreases first and then decreases. The maximum erosion rate appeared in0.109~0.212mm particle size range, the erosion rate is0.98g/kg; after the emergence of aturning point, the wear rate is no longer increases with the reduction of grain size 0.380～0.830mm size range of minimum rate of0.68g/kg, the maximum erosionrate is about70%.b) Erosion rate increased with the increase of particle impact velocity, bothapproximate linear relationships. Eroding velocity for erosion at17.4m/s was2.8g/kg, about7.9m/s erosion rate of28times; thus, scouring velocity are the mainfactors influencing the scour rate.c) Along with the increase of impact angle, erosion wear loss rate increases, andthe90°is maximum, the erosion rate is1.3g/kg, about15°4.3times, glass fiberreinforced resin shows obvious brittle erosion characteristics.(3) Using the measurement results of particle measurement system shows: with theincrease of gas jet exit velocity decreases and the particle size, particle velocityincreases gradually, reflects the fundamental trend of particle velocity increases withthe gas velocity.(4) with diameter of0.109mm~0.212mm, the jet exit velocity of109m/s conditions,numerical simulation, velocity of particles at100mm is about55m/s. Measurementof velocity of particles under the same conditions for61.91m/s; the simulation resultsand the test results are close to.(5) Combined with the fluid dynamics software Fluent6.3, the gas-solid two-phase jetand specimen in jet space of erosion were simulated; the model can accurately predictthe trend from the particle phase property distribution.