Numerical Analysis of Heating and Ablating Non-Pyrolitic Materials

A. Davidy
IMI
Ramat-Hasharon
Israel

In this paper a two dimensional time dependent model is developed and assessed to describe the interrelated processes of conduction, convective heating and ablation of non pyrolytic ablative material. An aerothermochemical analysis for the process of non-pyrolitic composite material regression in advanced solid-propellant rocket motors has been conducted.

The analytical approach is similar in spirit to the approach of Borie, with the main idea of the nozzle regression being due to the carbon-carbon chemical attack by H2O. The different steps of the work have consisted of the development and applications of several numerical codes substantiated by experimental results concerning the regression rate. The heat conduction equation is solved by using COMSOL Heat Transfer Module and Arbitrary Lagrangian-Eulerian (ALE) method.