Abstract
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.
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