Premium
Thermal behavior of gradient charring materials with improved iterative method
Author(s) -
Guo J.,
Huang H.,
Zhao Y.
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47076
Subject(s) - charring , space shuttle thermal protection system , materials science , thermal , discretization , composite material , heat flux , pyrolysis , temperature gradient , payload (computing) , trajectory , aerodynamic heating , mechanics , computer science , heat transfer , chemical engineering , thermodynamics , physics , thermal protection , engineering , mathematics , meteorology , astronomy , mathematical analysis , computer network , network packet
The lightweight material of the thermal protection system for a reentry vehicle has become a trend in order to maximize the payload. To explore the effect of gradient density on the thermal behavior of charring materials, a pyrolysis layer model considering of variable density is developed and discretized with the central difference method. An iterative method is improved to look for the locations of the moving interfaces and boundary in each time step. Taken different gradient phenolic impregnated carbon ablator under a return trajectory heat flux for the Orion vehicle as example, their thermal behavior and effective heat capacities are simulated using the code written. Numerical results indicate that the gradient designs can improve the thermal protection performance of charring materials effectively. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47076.