抄録
In the present work, a plasma wind tunnel using magnetic nozzle was developed and the flow characteristics were investigated. With stronger magnetic filed applied, the plasma flow was more compressed and squeezed in the radial direction, and elongated downstream, which was obviously confirmed by the captured images. The axial distributions of translational, rotational, vibrational, electronic excitation, and electron temperatures were measured by emission spectroscopy. Translational and rotational modes were in equilibrium, and their temperatures decreased downstream. The vibrational mode and electron translational mode were almost frozen. It was experimentally confirmed that the equilibrium or nonequilibrium phenomena occurred in magnetic nozzles in the similar way as seen in conventional solid nozzles.
