基于CAD/CAE技术的燃烧室设计与分析

【作者】 王永斌；

【导师】 钱志博；

【作者基本信息】 西北工业大学 ， 热能工程， 2006， 硕士

【摘要】 有限元方法(Finite Element Method，FEM)是CAE(计算机辅助工程，Computer Aided Engineering)的主要方法，是工程设计领域的一个强有力的计算工具，在几乎所有的工程设计领域发挥着特别重要的作用。发动机零部件的设计是有限元技术最早的应用领域之一。本文应用美国SDRC的大型软件I-DEAS(Integrated Design Engineering Analysis Software)，利用CAD(计算机辅助设计，Computer Aided Design)技术和三维有限元方法(FEM)，对某型外燃发动机的关键零件——旋转双层壁结构燃烧室进行实体建模、复杂边界条件的计算、分析和施加，并对燃烧室稳态温度场、应力场与变形情况进行了有限元分析，根据分析结果对其结构提出了改进意见。 本课题通过对大型CAD／CAE集成软件I-DEAS的应用，不仅探索出了I-DEAS软件用于解决复杂工程问题的方法及应用特点，而且通过具体应用为发动机零部件的设计与分析提供重要参考，也为实现发动机零部件的CAM(计算机辅助制造，Computer Aided Manufacturing)奠定基础。 本文还利用FLUENT软件对该燃烧室的冷却水流场进行了三维数值模拟。计算结果有助于了解和掌握燃烧室冷却水流场和燃烧室壁的温度场分布。为优化燃烧室设计与改进提供理论依据和指导。更多还原

【Abstract】 As a powerful computing tool in CAE(Computer Aided Engineering), the FEM (Finite Element Method) plays an important role in almost all engineering field. The design of engine’s parts is one of the fields in which the FEM was applied firstly. By means of the I-DEAS (Integrated Design Engineering Analysis Software) software, the paper apply the CAD (Computer Aided Design) technology and the FEM to the rotary double wall combustion chamber ----one of key parts of external combustion engine. The process include modeling of the chamber, computing and analyzing of complicated boundary condition, the temperature field ,the stress field and the deformation of the combustion chamber. At last, the paper gives some advices about the structure of the combustion chamber according to the result.Through applying the CAD software, this paper not only finds out the methods and traits of I-DEAS when it is used to solve complicated engineering problems. The paper also offers a useful reference to the design and analysis of engine’s parts, and settles a base for realizing the CAM (Computer Aided Manufacturing) of the engine’s parts. The paper makes a three dimension numerical simulation to the cool water of the combustion by means of FLUENT software. The result can help us realize temperature distribution of cool water and chamber’s wall. and provides a theoretic instruction for design and optimization of the combustion chamber.更多还原