...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Identification of radiative heat transfer parameters in multilayer thermal insulation of spacecraft
【24h】

Identification of radiative heat transfer parameters in multilayer thermal insulation of spacecraft

机译：航天器多层隔热中辐射传热参数的确定

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Purpose - The purpose of this study is to optimize multilayer vacuum thermal insulation (MLI) of modern high-weight spacecrafts. An adequate mathematical simulation of heat transfer in the MLI is impossible if there is no available information on the main insulation properties. Design/methodology/approach - The results of experiments in thermo-vacuum facilities are used to re-estimate some radiative properties of metallic foil/metalized polymer foil and spacer on the basis of the inverse problem solution. The experiments were carried out for the sample of real MLI used for the BP-Colombo satellite (ESA). The recently developed theoretical model based on neglecting possible near-field effects in radiative heat transfer between closely spaced aluminum foils was used in theoretical predictions of heat transfer through the MLI. Findings - A comparison of the computational results and the experimental data confirms that there are no significant near-field effects between the neighboring MLI layers. It means that there is no considerable contradiction between the far-field model of radiative transfer in MLI and the experimental estimates. Originality/value - An identification procedure for mathematical model of the multilayer thermal insulation showed that a modified theoretical model developed recently can be used to estimate thermal properties of the insulation at conditions of space vacuum
机译：目的-这项研究的目的是优化现代高重量航天器的多层真空隔热（MLI）。如果没有有关主要绝缘性能的可用信息，则无法对MLI中的传热进行充分的数学模拟。设计/方法/方法-在热真空设备中的实验结果用于根据问题的反解重新估计金属箔/金属化聚合物箔和垫片的辐射性能。对用于BP-科伦坡卫星（ESA）的真实MLI样本进行了实验。基于忽略近距离铝箔之间辐射热传递中可能的近场效应的最新开发的理论模型被用于通过MLI进行热传递的理论预测中。研究结果-将计算结果与实验数据进行比较，确认相邻的MLI层之间没有明显的近场效应。这意味着MLI中辐射传输的远场模型与实验估计值之间没有明显的矛盾。原创性/价值-多层隔热材料数学模型的识别程序表明，最近开发的改进的理论模型可用于估算空间真空条件下隔热材料的热性能

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号