抄録
Quasi-steady non-charring ablation in a semi-infinite solid with linearly temperature-dependent thermal properties is solved by two kinds of perturbation methods, where the surface temperature and recession rate are constants. One is the conventional perturbation method (CPM) and the other is the modified perturbation method (MPM), where the perturbation parameters are α (thermal conductivity parameter) and γ (specific heat parameter). The solutions by the CPM, MPM, and the finite difference method (FDM) are compared. The effects of α and γ upon the dimensionless temperature are investigated. It is found that the MPM solution is more accurate than the CPM solution and the MPM extends the applicable range of the perturbation parameters, α and γ, compared with the CPM. The solutions by three kinds of calculation methods (FDM, CPM and MPM) are compared with the measured results. Application of these solutions to Teflon material is discussed.
