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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Influence of material properties and structural parameters on the performance of near-space use lightweight insulation structure
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Influence of material properties and structural parameters on the performance of near-space use lightweight insulation structure

机译：材料特性和结构参数对近空用途轻质绝缘结构性能的影响

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摘要

We recently developed a lightweight insulation structure (LIS) which had a high request in thermal insulation performance and structural weight and was promising to be used as the thermal control element for a near-space aircraft. In the present paper, the effects of the material properties and structural parameters on the thermal insulation performance of near-space use LIS were numerically investigated in detail. In the proposed theoretical model, the equivalent thermal conductivities and specific temperature differences of LE were studied to make detailed thermal features clear. Compared with the experimental and previous simulation data, the theoretical model has been validated, showing a good consistency. The results showed that the thermal conductivity of insulating material had a great influence on the specific temperature difference due to its strong effect on the equivalent thermal conductivity of LIS. In addition, it can be seen that the structural parameters mainly influenced the insulation performance of LIS by changing the areal density of LIS. The results demonstrated that the theoretical model suggested a pathway towards designing the structure parameters of near-space use LIS and selecting suitable insulating materials quickly. (C) 2017 Elsevier Ltd. All rights reserved.
机译：我们最近开发了一种轻质绝缘结构（LIS），其在绝热性能和结构重量中具有高要求，并且希望用作近空飞机的热控制元件。在本文中，在数值上详细研究了物质性质和结构参数对近空间使用LIS的绝热性能的影响。在拟议的理论模型中，研究了LE的等效热导体和特定温度差异，使热特性清晰。与实验和先前的仿真数据相比，理论模型已被验证，显示出良好的一致性。结果表明，由于其对LIS等同的导热率的强烈影响，绝缘材料的导热率对特定温度差具有很大影响。此外，可以看出，结构参数主要通过改变LIS的面密度来影响LIS的绝缘性能。结果表明理论模型建议设计近空间使用LIS的结构参数并快速选择合适的绝缘材料。 （c）2017 Elsevier Ltd.保留所有权利。

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