论文部分内容阅读
炭化层结构是绝热层烧蚀的重要影响因素,为进一步了解烧蚀过程中炭化层孔隙结构的特点,采用多孔介质体烧蚀模型进行数值模拟分析。用Arrhenius公式实时计算炭化层内沉积反应增加的碳量以及氧化反应消耗的碳量,获得了烧蚀过程中炭化层孔隙结构的演化规律。同时获得了炭化层内烧蚀气体的流速和压强的量级与分布情况,为进一步探索烧蚀过程中炭化层的机械剥蚀打下基础。
The carbonized layer structure is an important factor affecting the ablation of the thermal insulation layer. In order to further understand the characteristics of the carbonized layer pore structure in the ablation process, the porous media ablation model is used to carry out the numerical simulation analysis. The Arrhenius formula was used to calculate the amount of carbon added during the deposition reaction and the amount of carbon consumed by the oxidation reaction in real time. The evolution of pore structure in the carbonized layer during the ablation process was obtained. At the same time, the magnitude and distribution of the flow rate and pressure of the ablation gas in the carbonized layer were obtained, laying a foundation for further exploring the mechanical ablation of the carbonized layer in the ablation process.