基于Gambit前处理的气膜冷却火焰筒壁温分析

摘要

为更好实现航空发动机燃烧室气膜冷却结构火焰筒的壁温分析和冷却结构优化,针对原有的火焰筒2维壁温计算程序开展了2次开发工作,形成了基于GAMBIT前处理的火焰筒壁温分析程序.新的计算过程采用Gambit软件对几何模型进行前处理,生成三角形网格、指定边界条件分组,通过编制前处理模块代码,对导出的网格文件进行解析,进一步将各种信息导入已有的有限元壁温计算程序,完成壁温计算分析.给出了采用以上方法进行火焰筒壁温计算和优化的实例,结果表明:该方法较为有效地克服了原方法的各项缺点,其交互性强,大幅度提高了工作效率.%In order to effectively realize wall temperature analysis and cooling structure optimization of film cooling flame tube for aeroengine combustor,secondary development work was carried out on an existing two-dimensional temperature calculation program for flame tube wall.A new flame tube wall temperature analysis program generates based on Gambit.The new calculation procedure deal with geometric model,form a triangle mesh and specify the boundary conditions using Gambit.Then,use a developed preprocessing module code to explain the exported mesh file,and various needed information was imported into the existing wall temperature calculation program.An example was given to calculate and optimize the flame tube wall temperature using the method.The result shows that the method is more effective and overcomes the shortcomings of original method,with better efficiency and strong interaction.