In order to improve the accuracy of traditional turbulence simulation calculation models of hydraulic retarder , the im-proved two-equation turbulence model of SST-Kωis used to numerical simulate the turbulent flow of hydraulic retarder as the research object named THB40, under different filling ratio and different velocity with gas-liquid two-phase whole flow in the CFX14.5, aimed at the flow characteristics of strong rotation , multi wall and large curvature .The calculation results of braking torque showed that the torque was increased as the velocity increased when the filling ratio was 95%, decreased as the velocity increased when the filling ratio was 38%.This was consistent with the results of the bench test , the maximum error between computer fluid dynamics ( CFD ) and bench test was 3.6%.Compared with the traditional turbulence models , the precision of improved SST-Kωturbulence model was raised about 20%, and the running time was saved by nearly 50%, which means that the turbulence model of improved SST-Kωis more suit-able for simulating turbulent flow of hydraulic retarder .The research results provide an accurate and highly efficient reference calcula -tion model of CFD to deeply study the breaking mechanism of hydraulic retarder .
NETL
NSTL
万方数据
维普
