【作者】 刘传蔚；

【导师】 王成恩；

【作者基本信息】 东北大学 ， 机械制造及其自动化， 2008， 硕士

【摘要】 在影响发动机性能的各项因素中,发动机叶片的几何形状以及其对应的气动性能对发动机的整体性能起着非常关键的作用,因此能否设计出好的叶片是整个发动机设计环节中关键的一环。针对涡轮叶片的造型特点,本文采用了非均匀有理B样条(Non-Uniform Rational B-Spline,简称NURBS)造型技术来生成三维叶片。同时利用NURBS方法其统一表示二次曲线弧与二次曲面的能力来对叶片造型曲线的前后缘小圆进行了处理。最后,利用NURBS方法和蒙面法相结合生成三维叶片,并对生成速度和效果进行了优化。在此基础上,本文以VC++.NET作为开发平台,采用目前最新的软件设计思想一模块化及MVC设计模式,实现了在OpenGL环境中对三维叶片的渲染仿真过程。OpenGL(即开放性图形库Open Graphics Library)是近几年发展起来的一个性能卓越的三维图形标准,OpenGL图形库除了提供基本的点、线、多边形的绘制函数外,还提供了比较复杂的三维物体以及复杂曲线和曲面(如Bezier、NURBS等曲线或曲面),从而可以方便地构建虚拟三维世界。同时根据系统需要,本文采用ActiveX技术和GDI+图形渲染环境开发了用于涡轮叶片二维数据仿真的控件。此控件可以方便的实现各种二维离散数据点的多种方式拟和,而且提供了非常友好的交互接口。提供了图形的放大、缩小、移动以及图元的选取修改等功能。本文研究开发的软件各功能模块实用性好,功能比较完备,接口简单,专业性强,具有一定的继承性和后续发展潜力,通过不断的深入开发研究将使之能够成为飞机发动机叶型设计仿真的有力辅助工具。更多还原

【Abstract】 In all facts that affect the performance of Aero-Engine,the geometrical shape and the aero-dynamical performance of the blade play a significant role in the performance of engine. Therefore,the design of an excellent blade is a key to improve the whole performance of Aero-Engine.Considering the characteristic of the turbine blade, this thesis adopts the NURBS (Non-Uniform Rational B-Spline) model technology to create the three-dimensional blade. Meanwhile, we adopt NURBS method, which is able to unify the form of the conic, the arc and the conicoid, to deal with the small circles of font and back of the model curve of blade. Finally, we combine NURBS method and skinning method to produce the three-dimensional blade,and optimize the producing pace and effect.In order to realize the playing up and the simulation of three-dimensional blade in OpenGL environment, this thesis adopts the VC++.NET as the developing platform and the latest software design philosophy-module and MVC as the design mode.The OpenGL (Open Graphics Library) is a three-dimensional graphics standard with remarkable performance developed in recent years.The OpenGL library provides complicated three-dimensional object and complicated curve and surface(for instance, contours such as Bezier, NURBS and etc), besides the basic point, line and polygon.The OpenGL, therefore, can construct fictitious three-dimensional world conveniently.According to the requirement of the system,this thesis adopts ActiveX technology and GDI+graphic environment to develop an ActiveX-Control, which used in the simulation of the relative two-dimension data of the turbine blade. This ActiveX-Control provides various convenient ways of draft of two-dimensional dispersed dot, friendly interactive interface and the function of magnifying, minifying, moving, picking and changing primitive dot of the figure.The software’s all function modules, developed in this thesis,have well engineering application,intact function, simple interface,and a strong profession.Meanwhile,it also has some inherited property and evolution potential,and it is sure that it will be a good assistant tool of the Aero-Engine blade design and simulation unceasing research and development.更多还原