Active Cooling of Vascularized Composites for Application at Elevated Temperatures

摘要

The thermomechanical behavior of actively cooled composites in an elevatedrntemperature convective environment is evaluated. Active cooling is achieved byrnpumping coolant through microchannels manufactured into the material to removernheat and reduce temperature. Vaporization of Sacrificial Components (VaSC) is usedrnto create hollow microchannels in three-dimensional orthogonally woven glass-epoxyrncomposites. The flexural modulus of the active cooled composites is measured using arnfour-point bend test at several environmental temperatures up to 325 ℃. Materialrntemperature on the surface and inside the composites is measured usingrnthermocouples. Two channel architectures are compared, one containing channels atrnthe specimen surface and one containing channels along the neutral bending axis.