涡轮钻具叶片的逆向分析及流场仿真研究

发布时间：2018-01-05 07:06

本文关键词：涡轮钻具叶片的逆向分析及流场仿真研究　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：涡轮钻具中主要部件是由涡轮定子和转子组成的涡轮,它的作用是把液体能转化为主轴上的机械能。涡轮定转子叶片的形状制约着钻井液在涡轮中的流动状态,进而直接影响涡轮钻具的性能。涡轮叶片的表面为复杂的自由曲面,各研究单位和生产企业对该曲面几何参数均严格保密。如何快速掌握现场应用高性能叶片的关键技术并进行改进设计,是现阶段亟待解决的问题。逆向工程是根据已经存在的产品,快速消化吸收先进技术。因此,应用逆向工程技术来设计涡轮叶片对提高涡轮钻具的水力性能有重要的意义。本文以现场应用的涡轮钻具叶片为研究对象,借助于三坐标测量机和相关软件实现涡轮定转子叶片的逆向设计,研究的主要内容包括： (1)分析涡轮钻具叶片的特征,选择接触式测量方法,规划测量路径,使用三坐标测量机测量叶片曲面,获得8条截面线点云数据；学习Imageware逆向工程软件的使用方法,对点云分别进行点云滤波、点云对齐和点云分割处理。 (2)研究自由曲线曲面数学模型,用曲线拟合造型方法和点云直接拟合造型方法拟合曲面,将得到的6个曲面拼接成完整涡轮钻具定转子三维模型,使用UG软件对模型进行实体化操作,最终得到完整涡轮钻具转子实体模型；对该实体进行曲面光顺检查并建立误差评定量化指标。 (3)研究流体在涡轮钻具中流动的数学模型,使用UG软件建立涡轮钻具定转子流域的周期模型,用CFD软件对模型进行网格划分、设置边界条件和流场仿真操作,得到27三/s的恒定流量下涡轮定转子内流场压力和速度分布的基本规律,分析比较不同转速下转子叶片上压力变化,进行涡轮钻具试验,将试验得到的水力参数与模拟的水力参数进行对比,验证逆向工程技术设计涡轮钻具叶片的可行性。
[Abstract]:The main component of a turbine drill tool is a turbine composed of a turbine stator and a rotor, whose function is to convert liquid energy into mechanical energy on the spindle. The shape of the turbine stator and rotor blade restricts the flow of the drilling fluid in the turbine. The surface of the turbine blade is a complex free-form surface. The geometric parameters of the surface are strictly kept secret by all research units and production enterprises. How to quickly master the key technology of field application of high performance blade and improve the design. Reverse engineering is based on existing products, rapid digestion and absorption of advanced technology. Using reverse engineering technology to design turbine blades is of great significance to improve the hydraulic performance of turbine drilling tools. In this paper, the turbine blade applied in the field is taken as the research object, and the reverse design of turbine stator rotor blade is realized by means of CMM and related software. The main contents of the research include: 1) analyzing the characteristics of turbine drill blade, selecting contact measuring method, planning measuring path, measuring blade surface with CMM, obtaining 8 cross section line point cloud data; Learning the use of Imageware reverse engineering software, point cloud filtering, point cloud alignment and point cloud segmentation are carried out respectively. (2) the mathematical model of free curve and surface is studied. The curve fitting modeling method and point cloud fitting modeling method are used to fit the surface, and the 6 surfaces are spliced into the complete turbine drilling tool stator and rotor 3D model. Using UG software to carry on the entity operation to the model, finally get the complete turbine drilling tool rotor solid model; The surface fairing of the entity is carried out and the quantitative index of error evaluation is established. Thirdly, the mathematical model of fluid flow in turbine drilling tools is studied. The periodic model of stator and rotor basin of turbine drilling tool is established by UG software, and the model is meshed with CFD software. By setting boundary conditions and flow field simulation operation, the basic law of pressure and velocity distribution in turbine stator rotor is obtained at 27 / 3 / s constant flow rate, and the pressure variation on rotor blade under different rotational speeds is analyzed and compared. The hydraulic parameters obtained from the test are compared with the simulated hydraulic parameters to verify the feasibility of the reverse engineering technology for the design of turbine drill tool blades.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE921.2

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