Simultaneous reconstruction of thermal degradation properties for anisotropic scattering fibrous insulation after high temperature thermal exposures

摘要: Abstract To probe thermal degradation behavior of fibrous insulation for long-term service, an inverse analysis model was developed to simultaneously reconstruct properties fibers after exposures from the experimental response data, by using measured infrared spectral transmittance and X-ray phase data as direct inputs. take into account possible influence exposure on conduction heat transfer, we introduced a new parameter in conductivity model. The effect microstructures parameters evaluated. It found that high temperature decay rate radiation intensity passing through material weakened, probability being scattered decreased during photons traveling medium. medium more forward directions. shortened transfer path due mechanical degradation, along with enhancement mean free phonon scattering devitrification severe treatment, made coupled solid/gas conductivities increase rise treatment temperature.