CAJ | 학술논문

为了研究燃气发生器燃烧室绝热层的传热烧蚀过程，建立了热化学烧蚀计算模型和绝热层传热计算模型。考虑到烧蚀过程中绝热层边界的移动，根据预测-校正格式对模型进行离散，并采用拟牛顿法对绝热层的烧蚀过程及传热过程进行了耦合计算。计算得到了绝热层表面温度、烧蚀率和烧蚀厚度等参数的变化规律。计算结果表明，预测-校正格式和拟牛顿法可以用于求解时动边界的瞬态传热模型。
위료연구연기발생기연소실절열층적전열소식과정，건립료열화학소식계산모형화절열층전열계산모형。고필도소식과정중절열층변계적이동，근거예측-교정격식대모형진행리산，병채용의우돈법대절열층적소식과정급전열과정진행료우합계산。계산득도료절열층표면온도、소식솔화소식후도등삼수적변화규률。계산결과표명，예측-교정격식화의우돈법가이용우구해시동변계적순태전열모형。
In order to study thermal behavior and ablation of insulator in the combustor of gas-generator, the thermo-chemistry ablation model and heat transfer calculation model were established. Considering the fact that the boundary of insulator is moving during the abla-tion, the models were discredited with predicted-correction method. Coupling calculations were carried out for insulator ablation and tem-perature field with quasi-Newton method. Temperature of inner wall, ablation velocity and ablation thickness were calculated. The results show that the predicted-correction method and the quasi-Newton method can be applied in unsteady heat transfer and ablation problem with moving boundary.