Abstract:
The effect of fluid axial thermal conduction on one-dimensional liquid metal natural circulation and its linear stability was performed through non-dimensional analysis, steady-state assessment, and linear perturbation evaluation. The Nyquist criterion and a root search method were employed to find the linear stability boundary of both forward and backward circulations. The study provided a relatively complete analysis method for one-dimensional natural circulation problems with the consideration of fluid axial heat conduction. The results suggested that fluid axial heat
conduction in natural circulation loop should be considered only when the modified Peclet Number is in the order of one or below, which is significantly smaller than the practical value of Lead liquid metal cooled reactor.
