Thermal response of heat-resistant layer with pyrolysis

• Main Authors: Huang Haiming, Xiaoliang Xu, Huang Guo, Zhang Zimao
• Format: Article
• Language: English
• Published: VINCA Institute of Nuclear Sciences 2012-01-01
• Series: Thermal Science
• Subjects: heat-resistant layer; pyrolysis; phase transition; thermal response
• Online Access: http://www.doiserbia.nb.rs/img/doi/0354-9836/2012/0354-98361100035H.pdf

A model is developed for analyzing the thermal response of the heat-resistant layer composed of high silica fiber reinforced phenolic matrix composites(SiO2/P) and aluminum, in which pyrolysis and phase transitions are exsited, such as melt, vaporization and sublimation. Based on this model, the thermal response of the heat-resistant layer with different SiO2/P thickness is calculated under a heat flux by using FORTRAN codes. As indicated in the results, the slope of temperature gets a sudden decline at the pyrolysis interface, which is due to the latent heat of pyrolysis; the thickness of heat-resistant layer has little influence on the heating-surface temperature, however, the back temperature may increase with the decreasing thickness; and the thermal conductivity of carbonized layer is very important to thermal response.