The unstructured solver within Wind-US 3.139 was evaluated for simulating the ejector nozzle flow. A three-dimensional, hybrid unstructured grid was used. The grid cells at the surfaces were hexahedral and constructed in layers to resolve the boundary layers. The remainder of the fow domain was filled with tetrahedral cells. Table 1 below provides links to the grid file, input data file, solution file, and list output file for the simulation.
The flow and nozzle conditions were the same as the structured-grid simulations. This simulation uses the Spalart-Allmaras turbulence model. The flow equations are solved using the implicit line Gauss-Seidel method with inviscid fluxes represented using the HLLE formulation.
| Table 1. Files. |
| run.cgd |
| run.dat |
| run.cfl |
| run.lis |
The velocity and temperature profiles at axial stations in the jet were obtained from the converged solution using the cfpost utility with the command inputs listed in the file cfpost.ejector.com. The output files are listed in Table 2.
| Table 2. Output files. |
| yV.gen |
| yT.gen |
The figures below compare the velocity and total temperature profiles at stations within the jet. Comparisons are made between the experimental data (labeled "Data") and results obtained from earlier simulations using the Wind structured solver using the SST turbulence model (labeled "Wind SST"). The profiles labeled "Wind-US (S-A)" are from the current unstructured grid simulations using the Spalart-Allmaras turbulence model.
