Gas-liquid centrifugal separation phenomena of two-phase swirling flows in a short vortex chamber have been investigated experimentally. The relations of the liquid flow rate to the separation efficiency, the radial width of the separated liquid, the liquid residual time in the chamber, etc. were made clear quantitatively. It was concluded that setting an annular exhaust slit at the upper wall of the chamber had a greater effect for the improvements of the vortex chamber than doing so at the lower wall : especially, in the case of the upper exhaust slit, the total efficiency of the vortex chamber taking account of both the liquid residual time and the separated liquid fraction became larger. The data obtained in the experiment could be useful in designing various short vortex chambers accompanied with a two-phase swirling flow.
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