Diagnostic Methods in Combustion MHD Flows

Methods for the determination of the important properties of combustion MHD channel flows are reviewed, with emphasis on spatially resolved measurements interior to the flow that have actually been applied to combustion MHD systems, or that have reasonable promise of being so applied. The principal parameters whose measurement is discussed include the average velocity and turbulence intensity, the temperature, the electrical conductivity and electron concentration, and, for pulverized fuel, the slag particle concentration and size distribution. Various techniques are illustrated by measurements performed at the High Temperature Gas-dynamics Laboratory, Stanford. The merits of various methods, including both material probes and nonintrusive techniques, are assessed with respect to accuracy, spatial resolution, temporal resolution and relative ease of application. 117 references.