Abstract
A quasi-one-dimensional analysis is made for a nonequilibrium flow of dissociated diatomic gas through a converging-diverging nozzle. The vibrational mode of molecules is assumed to be always in equilibrium with the translational temperature and the viscosity, thermal conductivity and diffusion are neglected throughout the analysis. Particularly, the nonequilibrium transonic flow near the throat of a nozzle is analyzed and it is verified that the sonic point appears slightly downstream of the throat. An iterative computation is performed for obtaining the sonic point and flow quantities there, including the critical mass flow rate. The results show that the distance of the sonic point from the throat and the critical mass flow rate vary with the radius of curvature of the nozzle wall at the throat and the reservoir condition.
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