航天器工程2024，Vol.33Issue(3)：54-60,7.DOI:10.3969/j.issn.1673-8748.2024.03.008
航天器轻型低温多层组件的隔热性能研究
Reasearch on Thermal Insulation Performance of Lightweight Low-temperature Multilayer Blankets for Spacecraft
李进 1周晓云 1赵啟伟 1毛俊俊1
作者信息
- 1. 北京空间飞行器总体设计部 航天器热控全国重点实验室,北京 100094
- 折叠
摘要
Abstract
As one of the important thermal control products for spacecraft,low-temperature multi-layer insulation blankets are usually used for thermal insulation of the equipment inside the cabin and to reduce the radiation heat transfer between the spacecraft cabin panel,extravehicular equip-ment and external space.The Multilayer Insulation Blanket(MLI)accounts for a considerable proportion of the weight of the whole thermal control subsystem.With the development of large spacecraft towards high performance and high payload-mass ratio,the demand for weight reduc-tion of thermal control products is increasingly prominent.A lightweight low-temperature multi-layer insulation blanket is developed for the purpose of weight reduction using double-sided alu-minized polyester convex film as the reflection barrier,while thermal insulation functions of both the reflection barrier and the separation layer have been taken into account.Thus the structure of the MLI is optimized.An experimental method is designed to conduct experimental research on the thermal insulation performance of the lightweight multilayer,and verified by simulation cal-culations,while the effectiveness can be proved further by in-orbit flight data.The results show that under the same experimental conditions,the equivalent emissivity of the lightweight multi-layer increases by about 30%compared with the traditional multilayer,while the weight reduces by 35%.Appropriately considering uncertainty,the parameter value of 0.03 can be reasonable.The thermal insulation performance of the new lightweight multilayer blankets is fairly good and can meet requirements of most spacecraft.The lightweight multilayer blankets could be widely used in the aerospace field as lightweight heat insulation materials.关键词
凸纹薄膜/有效发射率/当量辐射率/多层隔热组件Key words
convexfilm/effective emissivity/equivalent emissivity/MLI分类
航空航天引用本文复制引用
李进,周晓云,赵啟伟,毛俊俊..航天器轻型低温多层组件的隔热性能研究[J].航天器工程,2024,33(3):54-60,7.
