Recombination Coefficients and Spectral Emissivity of Silicon Carbide-Based Thermal Protection Materials

Theoretical, experimental and numerical study of infrared radiation heat transfer in a drying furnace

“…The equations system is solved by the matrix inversion method getting the heat radiation distribution from the silicon carbide tubes, reflecting shield and the radiant energy to the load. The silicon carbide tube emissivity was fixed at 0.7 [23,24]. The load -wet cotton-emissivity was fixed at 0.9 [25] and the reflecting shield emissivity was fixed at 0.17 which corresponds to polished stainless steel [21,26].…”

Nitrogen Catalytic Recombination on Copper Oxide in Tertiary Gas Mixtures

“…The freestream static pressure in an arc-jet is in the order of several tens or hundreds pascals (e.g. Pidan et al [35] reported 40 Pa and one of world's most powerful arc-jet SCIROCCO [37] can reach 290 Pa). This makes it impossible to properly mimic the stagnation pressure in real flight, which results in an inaccurate catalytic efficiency when used in Goulard's theory (Eq.…”

“…The total enthalpy and long test time that can be reached using an arc-jet surpasses the capabilities of a side-arm reactor or shock tube/tunnel. Pidan et al [35] used in 2005 an arc-jet to produce a 34 MJ/kg flow to test sintered silicon carbide (SSiC) when exposed to dissociated oxygen. A double probe was used to measure the heat flux using a calorimeter and the pitot pressure sensor, shown in Fig.…”

“…These facilities use an electric discharge (an arc) to accelerate the flow to high velocities (i.e. supersonic freestream [34,35]) at high temperatures (i.e. several thousands Kelvin).…”

“…2). The measurements The double probe used by Pidan et al [35] to measure the heat flux and pitot pressure.…”