Numerical Simulation of Fluid Flow through Valves Reeds Based on Large Eddy Simulation Models (LES)

摘要

One of the most critical aspects on hermetic reciprocating compressors design is to know in deep and clearly understand how the fluid flows through their valve reeds. In that sense, the use of CFD&HT codes, together with experimental validation tests are the best way to advance in this purpose. The use of TermoFluids code developed in a spin-off created by different researchers of CTTC Group has the advantage of knowing the whole CFD&HT code, working together with CFD developers, and using a new parallel, unstructured and object oriented CFD&HT code for turbulent industrial problems on low cost PC cluster. The aim of this paper is to study the fluid flow behavior through the valve at different Reynolds numbers and valve displacements, showing the numerical results obtained using only a symmetry-preserving discretization vs. considering large eddy simulation models (LES) for 2D and 2D periodical conditions. The studied cases vary from laminar to turbulent flow, almost to be considered incompressible and lower supersonic conditions and/or chocked flow. The numerical results allow knowing a numerical analysis of the effective force and flow area for the studied cases.