Analysis and Comparison of Leakage and Dynamic Characteristics for Supercritical Carbon Dioxide Labyrinth Seal
The three-dimensional CFD calculation model of the labyrinth seal is established.The supercritical carbon dioxide flow in the labyrinth seal is simulated.The leakage and dynamic characteristics of the supercritical carbon dioxide labyrinth seal are analysed and compared with those of the ideal gas labyrinth seal.Results show that the density of supercritical carbon dioxide is larger while the axial velocity is lower when compared with the ideal gas.But the increase in the density is larger than the decrease in the axial velocity.This leads to that the supercritical carbon dioxide labyrinth seal increases the leakage by 21%when compared with the ideal gas labyrinth seal.Compared with the ideal gas labyrinth seal,the supercritical carbon dioxide labyrinth seal at low whirl speed has the larger tangential force and worse stability,while the supercritical carbon dioxide labyrinth seal at high whirl speedhas the smaller tangential force and better stability.
万方数据
维普
