多相流下风机叶片复合材料力学性能及冲刷磨损行为研究

发布时间：2018-05-08 11:02

本文选题：多相流 + 风机叶片　；参考：《新疆大学》2015年硕士论文

【摘要】：新疆的风能资源非常丰富,但是环境较恶劣,沙尘天气较多,风沙运动会对各种物体造成强烈的风蚀作用。风电机组会受到风蚀作用,尤其是复合材料风机叶片,长期的风蚀必将造成材料失效报废。在风机运行过程中,叶片不但要承受复杂的载荷,而且要抵挡风沙的冲刷。针对新疆的特殊情况,本课题主要研究风机叶片复合材料的风沙冲蚀磨损行为及其力学性能,为叶片复合材料保护提供一定的参考。本论文首先介绍了国内外风电产业的发展概况,以及多相流冲刷磨损的定义及其影响因素。接着介绍了玻璃纤维增强树脂基复合材料的制备过程。其次,根据力学性能实验标准,采用巴氏硬度计测试了玻璃纤维增强树脂基复合材料表面的巴氏硬度,采用电子万能试验机分别对试样进行了压缩及弯曲力学性能测试,获得了巴氏硬度值、压缩强度及模量、弯曲强度及模量。然后,根据三因素三水平的正交试验方法,选取气流速度、沙粒粒径和冲击角度作为主要考核指标,用多相流冲蚀试验机分别对两组复合材料试样进行气固两相流、气固液三相流的冲刷磨损试验。冲刷试验过程中,需称量试样磨损前后的质量,计算磨损失重量。最后,使用PGI非球面测量仪对冲刷试样的冲蚀坑进行线扫描,获得了冲蚀坑扫描曲线,定性分析了各试样的冲蚀程度;使用场发射扫描电镜观察复合材料表面冲刷磨损形貌,分析了材料的冲刷磨损机理。
[Abstract]:The wind energy resources in Xinjiang are very rich, but the environment is bad and the dust weather is more. The wind-sand sports meet causes strong wind erosion to various objects. Wind turbine will be affected by wind erosion, especially composite fan blades, the long-term wind erosion will lead to material failure and scrap. During the operation of the fan, the blade should not only bear complicated load, but also resist the erosion of wind sand. In view of the special situation of Xinjiang, this subject mainly studies the wind sand erosion wear behavior and mechanical properties of fan blade composite material, and provides a certain reference for the protection of blade composite material. In this paper, the development of wind power industry at home and abroad, the definition of multiphase flow scour wear and its influencing factors are introduced. Then the preparation process of glass fiber reinforced resin matrix composites was introduced. Secondly, according to the experimental standard of mechanical properties, the pasteurized hardness of glass fiber reinforced resin matrix composites was tested by using pasteurian hardness meter, and the compression and bending mechanical properties of the samples were tested by electronic universal testing machine. The values of Pasteur hardness, compression strength and modulus, bending strength and modulus were obtained. Then, according to the orthogonal test method of three factors and three levels, the airflow velocity, sand particle size and impact angle were selected as the main assessment indexes, and the gas-solid two-phase flow was carried out on the two groups of composite materials by multi-phase flow erosion testing machine. Erosion wear test of gas-solid-liquid three-phase flow. In the process of scouring test, the weight of wear loss should be calculated by weighing the quality of the sample before and after wear. Finally, the scour pits of the scour samples were scanned by PGI aspheric measuring instrument, and the scanning curves of the scour pits were obtained, the erosion degree of the samples was analyzed qualitatively, and the erosion and wear morphology of the composite surface was observed by field emission scanning electron microscope. The erosion wear mechanism of the materials was analyzed.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33

【参考文献】