Supersonic Swirling Separator for natural gas heavy fractions extraction: 1D model with real gas EOS for preliminary design

摘要: Abstract A Supersonic Swirling Separator (SSS) device could be usefully adopted in the natural gas transmission pipelines order to condense and separate heavy hydrocarbons from gaseous phase without significant pressure losses. In present work, two models were developed simulate phenomena involved process: supersonic flow acceleration a nozzle, swirling effect, centrifugal separation of liquid phases last straight pipe. The model allows satisfactory first attempt 1D design whole separator. typical Natural Gas mixture was considered and, starting that, different simplified mixtures with reduced number components (three five) defined achieve purpose reliable acceptable computational time resources for basic tool. GERG EOS modelling, implemented NIST REFPROP, which are most accurate currently available. thermodynamic one dimensional allowed calculation shock wave axial position divergent channel, main properties distribution along nozzle composition vapor phases. but sufficiently numerical procedure evaluate sound speed. An extended sensitivity analysis carried out range boundary conditions. addition, simulation gas-liquid proposed. Joining separator geometry check expected condensation performance.