Abstract：In order to obtain the velocity and pressure distribution characteristics in each flow unit field, the fullflow channel geometry model was extracted as compute domain to conduct the threedimension transient numerical simulation of gasliquid twophase flow in hydraulic retarder based on the large eddy simulation method and sliding mesh theory for multiflow regions coupled calculation in CFD software. Mixture model and Eulerian model were used alternately to achieve the structure change of internal flow field and the volume distribution of the twophase flow under different filling rate. The generation mechanism of secondary flow, flow separation and vortex was analyzed, and the external retarder characteristic was also calculated. The results show that the numerical results are in good consistency with experimental data with the error less than 8%. The large eddy simulation method can effectively simulate the true flow structure in hydraulic retarder flow field and conduct retarder design and structural optimization.
2012, Vol. 33 
