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针对轴编C/C复合材料的结构形式和烧蚀机理,建立了喷管喉衬烧蚀的多尺度分析方法。通过宏观-微观的渐进分析,获得了喷管喉衬的烧蚀率和烧蚀形貌。数值模型反映了喷管热反应边界均匀反应、流场参数、燃气传质过程和材料微观烧蚀对喉衬烧蚀性能的影响。数值计算结果和实验数据吻合较好,表明所建立的数值模型可有效预测轴编C/C复合材料喉衬的烧蚀性能。
Aiming at the structure and ablation mechanism of C / C composites, a multi-scale analysis method of nozzle throat ablation was established. Through the macroscopic and microscopic progressive analysis, the ablation rate and ablation morphology of the nozzle throat lining were obtained. The numerical model reflects the influence of nozzle uniform reaction on thermal reaction boundary, flow field parameters, gas mass transfer process and material micro-ablation on the ablation performance of throat lining. The numerical results are in good agreement with the experimental data, indicating that the numerical model established can effectively predict the ablation performance of the axial lining C / C composite throat lining.