不同工艺状态的玻璃布/酚醛复合材料防隔热特性研究

ABLATION AND INSULATION BEHAVIORS OF GLASS CLOTH / PHENOLIC LAMINATES WITH VARIABLE PROCESSING TECHNIQUES

玻璃布/酚醛复合材料有较好的耐烧蚀和隔热特性,被广泛用于工业耐高温设备以及高速飞行的航天器防隔热设计上,但是不同的成型工艺表现出的耐烧蚀及隔热特性却存在差异。将不同玻璃布厚度、不同缠绕工艺、不同固化方式、以及有机纤维与玻璃纤维混编工艺获得的玻璃布/酚醛制品,取样进行风洞条件下的耐烧蚀、隔热性能试验,试验测量了各模型的质量烧蚀率及背面温升,用于评估其相应的防隔热性能。试验结果显示倾斜缠绕工艺耐烧蚀及隔热性能最优,与理论预期一致,可为工程应用提供参考。

Glass cloth / phenolic laminates are widely used in industrial high-temperature equipments and thermal protection systems of various high speed space vehicles due to their good ablation-resistant and insulation behaviors. However,it exhibits substantial differences when the glass cloth / phenolic products were made from several variable processing techniques / factors,e. g.,thickness of the glass fiber fabric,fiber winding technique,curing schedule and adding organic fiber into the glass cloth. In order to compare their ablation-resistant and insulation properties,the glass cloth / phenolic samples chosen in this study were tested using an arc-jet apparatus,the massloss and cool-side temperature of the samples gauged in the test were used to estimate their ablation-resistant and insulation behaviors. The test indicates that the tilt winding FRP is better to the others,consistent with the estimation,whose results served as the reference basis for engineering applications.