Separation efficiency theoretical model of swirl-vane separator based on bidirectional vortex

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Original languageEnglish
Article number108984
Journal / PublicationAnnals of Nuclear Energy
Online published8 Feb 2022
Publication statusPublished - 1 Jun 2022


Swirl vane separator is a vital component to separate liquid water from gas to provide high quality steam to turbines in liquid water reactors. The gas rotating flow in the riser of a swirl vane separator is a bidirectional vortex. Its tangential velocity is similar with Rankine vortex. Its axial velocity is bidirectional. The gas bidirectional vortex is solved by constructing a Bragg-Hawthorne equation for the stream function. The gas flow velocity predicted by new method agrees quite well with CFD. The maximum velocity differences in axial direction are 6.2%. Based on this model, the droplet trajectory is obtained and a new separation efficiency model has been developed. The average difference between experiment results and the predicted separation efficiency is reduced from 14.7% to 3.1%. Moreover, parametric analysis using new model has been carried out to discuss the effect of inlet velocity, droplet diameter, swirl vane angle and hub diameter.

Research Area(s)

  • Bragg-Hawthorne equation, Rotating bidirectional flow field, Separation efficiency, Swirl vane separator, Theoretical analysis model