Studies on Capacitor Coupled Power Extraction from an MHD generator

摘要

To avoid the damage of the electrodes, the capacitor coupled MHD generator has been proposed. Because the capacitor coupled MHD generator relies on the conventional MHD generator, the method of generating electromotive force is almost same without the extraction of electric power. To obtain the same output power of the conventional MHD generator, the capacitor coupled MHD generator is required to be higher AC magnetic field frequency or the larger capacitance of the channel. To demonstrate the capacitor coupled MHD generator, the transient MHD generator based on the model rocket engine was constructed. We can see that the capacitor coupled MHD generator extracts the electric energy. To understand the noise from the preionization discharge, we compared the capacitor coupled MHD generator with applied magnetic field to that without applied magnetic field. The result indicates that the extraction of electromotive force is not observed the capacitor coupled MHD generator without applied magnetic field.