长二丁运载火箭二级姿控发动机热控设计及其试验验证

根据长二丁运载火箭姿控发动机的热环境条件和系统对各组件的温控要求,初步制定了姿控发动机主要组件的热防护设计方案。以贮箱和电磁阀为主要热分析对象,用I-DEAS软件建立有限元模型,通过数值仿真计算获得各组件不同时间的温度。计算结果与贮箱和机组组件的地面模拟热辐射环境的热流试验数据进行比较,对设计作改进。最终给出了满足系统设计要求的二级姿控发动机热设计方案。

Thermal Design and Test of Attitude Control Engine of CZ-2D Rocket

According to the thermal analysis of radiation environment and the control temperatures required by the system for the second stage attitude engine of CZ-2D rocket,the elementary thermal protection scheme for the main subassemblies was established in this paper.FEA simplified numerical models for the subassemblies were created when the bladder tank,and solenoid valve were served as the study object.The temperatures for various assemblies were computed,and compared with the results of the thermal test on the ground.The initial design was improved then.At last,the thermal protection design scheme satisfied the system requirements was given out.