View Video Presentation: https://doi.org/10.2514/6.2023-0498.vid

Stoichiometric oxy-methane mixtures at pressures of 18.9 to 24 bar and temperatures between 1178 – 1642 K were studied in a shock tube. Emission spectroscopy, laser Schlieren, pressure histories, and fixed wavelength laser absorption spectroscopy at 3.39 μm has been used to measure methane decomposition rates and find the absorption cross-section of methane at 3.39 μm at these conditions. Various catalytic end walls were employed to determine any surface effects caused by the catalytic material observable at a location remote from the end wall.