The invention provides a lightweight design method and structure for a heat shield, and the method comprises the following steps: S1, taking an engine throat as a center, analyzing a temperature distribution rule from the center to the edge, and dividing the heat shield into a plurality of regions; s2, according to the temperature distribution of each area and the temperature requirement of the protected structure, the size, the number of layers and the material of the heat insulation units in each area are designed; s3, selecting a surface film on the outermost layer of the heat insulation screen according to the temperature range of the outermost layer of the heat insulation screen and the requirements of the absorptivity and the emissivity, and covering the edge of the heat insulation assembly by using the selected surface film; and S4, the boundaries of all the areas are fixedly connected through fasteners. And through matching of the first heat insulation assembly, the second heat insulation assembly and the third heat insulation assembly which are different in heat resistance, the low mass relative to conventional arrangement is achieved under the condition that the temperature requirement is met, and the lightweight design of the heat insulation screen is achieved.
本发明提供了一种隔热屏的轻量化设计方法及结构,包括如下步骤:S1、以发动机喉部为中心,分析由中心至边缘的温度分布规律,并将隔热屏划分为多个区域;S2、根据各个区域的温度分布以及被防护结构的温度要求,设计各个区域中隔热单元的尺寸、层数以及材料;S3、根据隔热屏最外层温度范围以及吸收发射率要求,选择隔热屏最外层面膜,并用选择的面膜对隔热组件进行包边;S4、各个区域的分界处均通过紧固件进行固定连接。并通过对耐热能力不同的第一隔热组件、第二隔热组件以及第三隔热组件的搭配,实现在满足温度要求的条件下,具有相对常规设置较低的质量,实现对隔热屏的轻量化设计。
Lightweight design method and structure of heat shield
隔热屏的轻量化设计方法及结构
2022-12-13
Patent
Electronic Resource
Chinese
IPC: | B64G Raumfahrt , COSMONAUTICS |
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