A Comprehensive Analysis Algorithm for Ablation, Temperature Fields and Thermal Stresses of the Carbon-Base Nosetips,

In this paper, the principles of the synthetic analysis and treatment techniques concerning vehicle re-entry thermal environment, ablation, heat transfer and thermal stresses are described. The thermochemical ablation calculations for chemical reactions on the ablating surfaces of carbon-base materials are simplified using selective calculation results. The temperature fields are calculated using the three-level explicit difference schemes for both constant and non-constant space steps within the total region. The thermal stresses are calculated, based on the incomplete generalized potential energy variational principles under the supposed conditions of linear elasticity, using the finite element method. This method can also be usd to calculate the effects of the various displacement boundary conditions. An automatic grid generation technique has been developed during the computer code editing, which helps improve the shape selection calculations.