Abstract

A suitable laboratory test procedure is developed where a small fragment of the relatively thick multilayer heat shield is exposed to the extreme heat flux of up to several kW/cm² in order to evaluate its performance. A nearly one-dimensional test condition has been achieved, where thermal behavior of a small fragment of a large shield became representative for the large heat-shield panel. A cylindrical test sample made of carbon-carbon composite has been surrounded by high-temperature thermal isolation made of zirconia concrete. The high heat flux has been provided by a power CW-laser. The conditions of one-dimensional axial heat flux through the cylindrical fragment of the heat shield are confirmed by the mathematical modeling of the experiment using experimentally measured temperature excursions along the sample axis.

中文翻译：

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极高能量通量下复杂热屏组件热特性评估方法

摘要

开发了一种合适的实验室测试程序，其中相对厚的多层隔热板的一小部分暴露在高达几kW / cm ²的极端热通量下为了评估其性能。已经达到了几乎一维的测试条件，其中大型屏蔽板的小片段的热行为成为大型屏蔽板的代表。由碳-碳复合材料制成的圆柱形测试样品已被氧化锆混凝土制成的高温隔热材料包围。高功率通量由功率连续激光提供。通过使用沿样品轴沿实验方向测量的温度偏移的实验数学模型，可以确定通过隔热罩圆柱体部分的一维轴向热通量的条件。