CFD Simulation and Experiment of Oil-free Screw Compressor

• Main Authors: LIN, WEN-KAI, 林文凱
• Other Authors: 方俊
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/ck9yzh

碩士 === 逢甲大學 === 航太與系統工程學系 === 107 === Computational Fluid Dynamics （CFD） is a common and corroborated simulation method in research of the analysis fluid systems. This thesis shows workflow, performs simulation analysis and compares experimental numerical for the Oil-free screw compressor. It is a dry flow for two stages twin-screw compressor with air. The simulation is performed by ANSYS CFX, which the computational grids for the rotational section are derived from the grid generator Twin-Mesh. Confirm that the final output pressure reaches 3 bar for first stage and 9 bar for second stage. First goal of the thesis is to simulate Oil-free Screw Compressor, design by commissioned manufacturer. Perform flow field analysis and compare the theoretical volume of theoretical volumetric efficiency. Second, use the experiment initial conditions to simulate and compare with the experimental numerical temperature, pressure, air volume, efficiency, force and torque. Thirdly, rotors will be optimize performance by changing length of contact line and area of the leaked triangle. Fourthly, try to simulate heat transfer exchange between water jacket and casing for cooling rotors compression chamber and observing the temperature difference.