碳/石英防热复合材料烧蚀性能

为研究碳/石英防热复合材料的烧蚀性能,采用电弧加热器和碳/石英平头驻点模型,在不同驻点压力Ps、不同热流密度q和不同焓值hs的多组合条件下进行了烧蚀试验。针对试验所得数据,利用多元回归分析方法,建立了质量烧蚀率与热流密度、驻点压力、焓值3个参数之间的数学模型,并对模型的合理性进行了检验。结果表明,所建立的3个参数数学模型对试验数据的拟合程度很好,热流密度与质量烧蚀率最为相关;与单参数、2个参数的数学模型相比,3个参数的数学模型对实验数据的拟合效果更好,能很好地反映碳/石英防热复合材料的烧蚀性能。

Ablation Properties of Carbon/Quartz Heat-Resistant Composites

In order to acquire the ablation properties of carbon/quartz composites,the ablation experiment was carried out under the condition of different stagnation pressures,different heat flux and different total enthalpy using the arcing heater and carbon/quartz flat head stagnation model in this paper.Based on the experimental data, the mathematical model between mass ablation rate and the three major factors,namely heat flux,stagnation pressure and total enthalpy is established by using multiple regression analysis method,and the rationality of the model was tested. The results show that the established three-parameter mathematical model has a good fitting degree to the experimental data,and the heat flux is the most relative parameter.Compared with the single-parameter and two-parameter mathematical models,the three-parameter mathematical model has a better fitting effect on the experimental data and can better reflect the ablation properties of the carbon/quartz heat-resistant composites.