Launcher Design for Chemical Looping CombustionF. Gao, D.W. Greve
Carnegie Mellon University, Pittsburgh, PA, USA
We report here on the use of the COMSOL emw (electromagnetic waves) module in the design of a microwave launcher. This launcher is to be used in a microwave Doppler sensor that is incorporated into a chemical looping combustion system. The launcher is designed in two steps. First, we determine the best mode for launching a wave into air from an overmoded cylindrical waveguide. he TE11 mode is desired for efficient launching from the cylindrical waveguide into the flow region. We then develop a transition from a coaxial transmission line to the cylindrical waveguide. Of three different designs, a taper launcher is best for efficiently coupling microwave energy from a coaxial line to the cylindrical waveguide.