论文部分内容阅读
以多层炭化烧蚀模型及冲压发动机近进气道部分工况对某采用高硅氧/酚醛绝热层的发动机补燃室进行了数值模拟.模拟结果表明,温度分布对炭化速度以及烧蚀坑的出现及烧蚀坑的位置有重要影响.采用孔隙率进行烧蚀判断的方法对于烧蚀率的计算较为准确,与实验值符合较好.但是,该方法缺乏对气流冲蚀作用的动态耦合,因而计算中烧蚀坑并不明显.
Based on the multi-layer carbonization ablation model and the near-inlet air-channel condition of a ramjet engine, a combustion chamber with high silicon / phenolic insulation layer was simulated by numerical simulation. The simulation results show that the temperature distribution has an important influence on the carbonization rate and ablation pit And the location of the ablation pit have an important impact on the determination of ablation porosity porosity for the calculation of the ablation rate is more accurate and in good agreement with the experimental value.However, this method lacks the role of dynamic erosion of gas flow coupling , So the calculation of ablation pit is not obvious.