| Autor: |
Delbende, Ivan, Rossi, Maurice, Piton, Benjamin |
| Zdroj: |
International Journal of Engineering Systems Modelling and Simulation; January 2012, Vol. 4 Issue: 1-2 p94-101, 8p |
| Abstrakt: |
We herein present a direct numerical simulation method aimed at describing the dynamics of helical vortices such as those developing in the wake of propellers and wind turbine or helicopter rotors. By enforcing a helical symmetry, the 3D incompressible Navier-Stokes equations are reduced to a 2D problem which we solve using a generalised vorticity/streamfunction formulation. In this framework, we simulate the viscous dynamics of one or several helical vortices and describe quasi-steady states as well as long-time (or far-wake) dynamics. In particular, several types of merging in the two helical vortex systems are identified. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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