Best Practice Advice AC6-14: Difference between revisions
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==Application Uncertainties== | ==Application Uncertainties== | ||
The complexity of the geometry, curved and bladed regions, tip-clearance and rotor-stator | |||
interaction, oscillation of the runner rotational speed which is absent in numerical | |||
simulations are some sources of uncertainties which make a high fidelity CFD model | |||
difficult to assemble. | |||
==Computational Domain and Boundary Conditions== | ==Computational Domain and Boundary Conditions== | ||
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Revision as of 07:16, 12 April 2016
Swirling flow in a conical diffuser generated with rotor-stator interaction
Application Challenge AC6-14 © copyright ERCOFTAC 2024
Best Practice Advice
Key Fluid Physics
The main features of the flow are the on-axis recirculation region,the vortex rope and the vortex breakdown, and wakes of the blades. The separation from the blades, flow in inter-blade passages, separation in the divergent part of the draft tube and rotor-stator interaction are among other physical mechanisms which make the flow fields complicated and difficult to model.
Application Uncertainties
The complexity of the geometry, curved and bladed regions, tip-clearance and rotor-stator interaction, oscillation of the runner rotational speed which is absent in numerical simulations are some sources of uncertainties which make a high fidelity CFD model difficult to assemble.
Computational Domain and Boundary Conditions
Discretisation and Grid Resolution
Physical Modelling
Recommendations for Future Work
Contributed by: A. Javadi, A. Bosioc, H Nilsson, S. Muntean, R. Susan-Resiga — Chalmers University of Technology
© copyright ERCOFTAC 2024