Some distinctive features of transient processes in the separation of multicomponent isotope mixtures in cascades

Mathematical Modeling of Nonstationary Separation Processes in Gas Centrifuge Cascade for Separation of Multicomponent Isotope Mixtures

“…The two initial conditions are: 1. Hydraulic parameters of cascade correspond to the stationary values, isotope concentrations in all stage are equal to their concentrations in feed flow [1,2] (initial conditions 1). 2.…”

“…During these processes isotope composition changes in cascade and it is necessary to minimize losses of cascade productivity. At present, there are mathematical models of nonstationary separation processes [1,2], which have such disadvantage as a limited field of application: simulation is only possible in the case of stationary hydraulic parameters of GC cascade. Using of these models is impossible for the joint calculation of nonstationary hydraulic and separation processes.…”

Transient processes in Q-cascades for separation of multicomponent mixtures

“…The mathematical model of the transient separation process for the "weak" enrichment approximation in our case by the analogy with separation of a binary isotope mixture can be presented as the system of partial differential equations (Xie et al, 2010;Vetsko et al, 1982Vetsko et al, , 1987Laguntsov et al, 1987;Sulaberidze and Laguntsov, 1973;Levin and Sulaberidze, 1998).…”

“…In this case it is used to say that the problem is solved under the assumption of the given cascade configuration and its fixed flow profile (Xie et al, 2010;Vetsko et al, 1982Vetsko et al, , 1987Laguntsov et al, 1987;Sulaberidze and Laguntsov, 1973;Levin and Sulaberidze, 1998). In addition, we assume that at the initial time moment the cascade is uniformly filled with a mixture with component concentrations are equal to that in a cascade feed flow.…”

“…For this purpose it was applied the relatively complex numerical procedures for calculation of the cascade parameters (Xie et al, 2010;Vetsko et al, 1982Vetsko et al, , 1987Laguntsov et al, 1987;Sulaberidze and Laguntsov, 1973;Levin and Sulaberidze, 1998). For model cascades in the case of multicomponent mixture separation a similar problem still remains unsolved.…”