Abstract

THIART, C. J. H.; VAN ZYL, G. P.; RONANDER, E.  and  MATHEWS, E. H.. Modelling of confined flow cooling nozzles for vibrational cooling. R&D j. (Matieland, Online) [online]. 1993, vol.9, pp.31-36. ISSN 2309-8988.

The success of the molecular laser isotope separation process is mainly dependent on the design of the correct profile for a confined flow cooling nozzle. The performance of the nozzle determines the size and efficiency of the plant. This article examines and developes a simulation method for the determination of the vibrational temperatures inside of such nozzles which are necessary to achieve design requirements. No complete method could be found in the literature for such analysis. All relevant aspects of flow cooling, except condensation, are taken into account by the proposed simulation. This includes gas dynamic properties, collision parameters, vibrational relaxation and adiabatic energy transfer in the heterogeneous gas mixtures. This model has been successfully verified. Further work includes the modification of the model to generate various nozzle geometries and to investigate certain design requirements. This method will then eliminate expensive hit and miss optimization of these types of nozzles.

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