Abstract
In the present work the Local Discontinuous Galerkin (LDG) method with polynomial adaptivity is applied to the Large Eddy Simulation (LES) of the parallel blade-vortex interaction (BVI). The BVI phenomenon occurs on helicopter and drone rotors in manoeuvring conditions and it produces impulsive changes in the pressure distributions, vibrations and noise. To deeply understand the mechanism of load generation related to the pressure field and three dimensional perturbations growth, to focus on the interaction between the vortex and the three dimensional structures in boundary layer and wake, accurate 3D unsteady numerical simulations of turbulent flows are necessary. For this reason, it is very important the use of a numerical code based on high order schemes such as LDG. Moreover, in the LDG approach, the numerical resolution can be varied on each element and in time, adapting to the requirement of the simulated flow and saving a large amount of computing resources. In the used numerical code the criterion for variation of the polynomial order is based on a refinement indicator especially suited for LES and based on the structure function. The local polynomial representation directly provides a means to separate large from small scale modes, thus providing the starting point for the definition of the subgrid scale models. In the present simulations, the subgrid scales contribution is represented with a sophisticated dynamic anisotropic subgrid model, suitable and well tested for wall resolved LES and complex separated turbulent flows. The BVI is simulated highlighting the effect of the vortex on the pressure distributions, on the boundary layer separation and on the resulting forces.
Original language | English |
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Title of host publication | 14th World Congress on Computational Mechanics |
Subtitle of host publication | WCCM-ECCOMAS Congress 2020 |
Editors | F. Chinesta, R. Abgrall, O. Allix, M. Kaliske |
Publisher | SCIPEDIA |
Number of pages | 13 |
Volume | 700 |
DOIs | |
Publication status | Published - 11 Mar 2021 |
Externally published | Yes |
Event | Joint 14th World Congress in Computational Mechanics and ECCOMAS Congress, WCCM-ECCOMAS 2021 - Virtual Event Duration: 11 Jan 2021 → 15 Jan 2021 Conference number: 14 https://www.wccm-eccomas2020.org |
Conference
Conference | Joint 14th World Congress in Computational Mechanics and ECCOMAS Congress, WCCM-ECCOMAS 2021 |
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Abbreviated title | WCCM-ECCOMAS 2021 |
City | Virtual Event |
Period | 11/01/21 → 15/01/21 |
Internet address |