Study on Ablation Mechanism of Carbon-phenolic Nozzle

The ablation process and the physical and chemical changes in the process of carbon-phenolic ablation composites at high temperature and supersonic flow are addressed, the microstructure of ablated surface is observed by scanning electron microscopy (SEM). The results show that ablation in the regions ranging from the downstream of the convergent section to the throat is the most severe, the ablation of the divergence cone is light; the ablation process of carbon-phenolic composite are mainly controlled by thermal-chemical ablation and mechanical erosion.