Development of Thermal Conductivity Apparatus for Ablative Composite Materials

摘要

Rafael has developed a transient thermal conductivity apparatusrnspecifically for ablative composite materials. This innovative apparatus isrncapable of determining thermal conductivity of materials over therntemperature range 330 to 1200 k, covering the pyrolytic stage of therncomposite material. The target specifications of the apparatus are thernmeasurement of thermal conductivity in the range 0.05-2.0 W∙m-1∙k-1 usingrnspecimen thickness in the range 7-25 mm. This is achieved using a newrndesign of a symmetric heater-specimen assembly, forcing an adiabatic staternalong its centerline. The temperature-controlled system is sustained in arnclosed chamber, capable of introducing specific gases, enabling tests underrna wide range of environmental conditions. This device will providernexperimental results of thermal conductivity for ablative materials over arnwide range of temperatures, enhancing the modeling capability of ablativernmaterials performance in solid motor rockets.