Numerical Investigation Of The Influence Of The Transient Flow Inside the Suction And Discharge Chamber On Heat Transfer Of A Small Reciprocating Compressor

The consideration of the convective heat transfer in the suction and discharge region of a compressor is handled differently in the literature. Commonly used are correlations for a steady state turbulent flow through a pipe like Chrustalev et al. (1998), Xin et al. (2000), Link et al. (2007). Here it is a point of principle whether such an approach is justified. Subjects of the present work are the consideration of the suction and the discharge chamber of a small air brake piston compressor. Here the influence of the fluid flow on the heat transfer inside the suction and the discharge chamber was investigated by means of CFD simulations for different reed valve behaviours. Three different working conditions for both the suction and discharge chamber are compared for low and high speed of the compressor: a) steady state valve mass flow, b) a mass flow for ideally opening and closing valve and c) a mass flow in case of fluttering valves close to reality.