In this paper, the transient refrigerant gas flow in a two-cylinder rolling piston type rotary compressor is simulated using STAR-CD, a general computational fluid dynamics (CFD) software. Three models with different suction piping systems are calculated respectively, one is two suction pipes were connected from accumulator to each cylinder separately (separate suction piping system), the other is suction pipes were connected commonly from accumulator to the cylinders (common suction piping system). Based on the results, the factors influencing compressor performance are studied, such as suction mass flow, suction throttle, suction pressure pulsation in the cylinder suction chamber, etc. Also the simulation results are proved by the bench test.
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