oil-free reciprocating compressor, FSI with conjugate heat transfer, Air cooling
It is critical to limit cylinder wall temperature for oil-free reciprocating compressor to work properly and reliably. The purpose of this paper is to show how to obtain cylinder wall temperature in oil-free reciprocating compressor design. Temperature field of a two stage oil-free CO2 reciprocation compressor with air cooling is computed numerically by two-way FSI simulation with conjugate heat transfer. Air flow around the compressor and heat conduction in the compressor are computed by 3D CFD code and FEA code respectively. Heat information is transferred between the two codes at FSI interface which is the compressor outside surface. The numerical results are validated by experiments.