高負荷遠心圧縮機インペラの非定常内部流れに関する研究

抄録

Recently, the demand of highly loaded centrifugal compressors is increasing due to environmental and economic reasons. In a compressor aerodynamic design, including the matching of an impeller and a diffuser, it is very important to predict the impeller flow field precisely using low calculation cost Computational Fluid Dynamics (CFD). However it becomes difficult to predict a compressor performance with enough accuracy because a large flow separation and a strong clearance leakage flow occur due to its high loading. Therefore, in order to validate the prediction accuracy of low calculation cost CFD to the highly loaded compressor, flow measurements at the impeller exit were conducted by using 3 holes yaw meter and hot wire anemometry, and high fidelity CFD was calculated by using Large Eddy Simulation (LES).