Study of Tunnel Thruster Performance and Flow by Quasi-Steady Reynolds-Averaged Navier-Stokes Simulation

A numerical approach based on the solution of the Reynolds-averaged Navier-Stokes （RANS） equations using the shear-stress transport （SST） turbulence model has been employed to investigate the hydrodynamic performance and flow of tunnel thrusters. The flow passages between adjacent blades are discret...

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Bibliographic Details
Published in:Shanghai jiao tong da xue xue bao 2016-12, Vol.21 (6), p.662-671
Main Author: 郁程 杨晨俊
Format: Article
Language:English
Subjects:
Architecture
Axial forces
Boundary layer flow
Boundary layers
Computer Science
Electrical Engineering
Engineering
Fluid flow
Hydrodynamics
Impellers
Life Sciences
Materials Science
Mathematical models
Mechanical stimuli
Navier-Stokes equations
Reynolds averaged Navier-Stokes method
Simulation
Thrust
Tunnel thrusters
Turbulence
Turbulence models
Turbulent flow
Viscous sublayers
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Summary:A numerical approach based on the solution of the Reynolds-averaged Navier-Stokes （RANS） equations using the shear-stress transport （SST） turbulence model has been employed to investigate the hydrodynamic performance and flow of tunnel thrusters. The flow passages between adjacent blades are discretized with prismatic cells so that the boundary layer flow is resolved down to the viscous sub-layer. The hydrodynamic performances predicted by the quasi-steady approach agree well with the experimental data for three impellers covering a range of blade area and pitch. Through analysis of the flow field, the reason why the hub of impeller also contributes to thrust which can amount to 40%-60% of the impeller thrust, and the mechanism of the impeller inducing an axial force on the hull are elucidated.
ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-016-1779-z