The design of two-stage gas and liquid cylindrical cyclone and numerical simulation of internal flow field characteristics

Abstract

In underwater gas fields, the ratio of gas phase and liquid phase has become higher and higher. Focusing on the special condition above, the design of a new kind of two-stage gas and liquid cylindrical cyclone (GLCC) has been proposed which is different from the traditional one with rectangle inlet. The equivalent volume transforming method has been used in the design of size. Based on the research of the liquid drops breaking in swirl field, a new test method of GLCC diameter has been proposed, according to Navier-Stokes equations. For the structure of this cyclone separator, the optimised numerical simulation has been used to study the internal flow field, which adopts better turbulence models, meshing schemes and discrete formats after comparison. The effects of parameters such as H and Dc on the asymmetric characteristics and vortex-core boundary have also been obtained and analysed. [Received: February 12, 2018; Accepted: May 21, 2018]