IDAC were contracted to verify and modify the design of the outlet nozzles by taking all the output data from the compressors and simulating the gas flow using CFD techniques. The work was carried out in two parts as follows:
CFD analysis on the existing design of the gas damper
CFD analysis on the new design of the gas damper
The geometry of the gas damper comprises of a cylinder with two outlets at the bottom and one inlet at the side. The graphic to the left shows the half symmetry model and a typical flow path through the structure.
The geometric model was defeatured using ANSYS DesignModeler and then meshed using prisms and tetrahedral meshes. A boundary layer mesh, based on the global length scale Reynolds number was also placed on the walls. Using the volumetric mesh, a transient solve was set up in CFX-Pre using a single-phase fluid, properties of which were specifically created to model the saturated gas.