토출구 형상 변화에 따른 무급유식 스크류 공기 압축기 성능 특성 연구

A screw air compressor is widely used for medium pressure applications in many industries. It is capable of high speed operation over a wide range of operating pressure and flow rate. Recently, a number of studies conducted to develop the appropriate analysis models. with vast improvements in computational technology and the availability of more accurate calculation methods. The use of CFD models has helped remarkably to evaluate the compressor performance. But, there has been a challenge in CFD modeling of screw compressor to obtain the appropriate rotating mesh systems to secure the sufficient quality to provide realistic results. In this paper, we developed a general approach method to investigate the flow fields in numerical simulation of the twin-screw air compressor. In particular, it is conducted to analyze the performance of newly designed two screw compressors with different shapes of discharge port. The calculated volumetric efficiency was graphically depicted.