As for the ablation of hypersonic vehicles

the parabolized Navier-Stokes(PNS) equations of chemical non-equilibrium were calculated numerically based on a kind of Newton-type iteration method.The chemical model of 18 species 33 reactions containing alkali-metal impurities was established on the basis of a carbon-phenolic ablative material.Firstly

the wall temperature of small blunt cone was computed and the numerical results were validated by comparing with those in a reference.Then

the hypersonic ablation flow field containing alkali-metal impurities were simulated and the effects of ablation reactions on the flow parameters were deeply analyzed.The results show that compared with non-ablation condition

the temperature of flow field increases by 10% to 15% in ablation reactions.And the electron number densities increase by 1 to 2 orders of magnitude after taking alkali-metal Na into consideration.