High fidelity CFD-CSD aeroelastic analysis of slender bladed horizontal-axis wind turbine

Sayed, Mohamed; Lutz, Th.; Krämer, Ewald; Shayegan, Sh.; Ghantasala, Aditya; Wüchner, Roland; Bletzinger, K.‐U.

doi:10.1088/1742-6596/753/4/042009

Cited by 23 publications

(28 citation statements)

References 12 publications

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“…The Chimera technique has often been applied in the CFD study of high-lift devices (Rogers et al 28 , Liao, Cai and Tsai 29 , Levesque, Pigeon and Deloze 30 ) and, more recently, for windturbine simulations (Santo et al. 25 , Yu and Kwon 31 , Sayed et al 32 ). A study comparing the Chimera technique for several CFD software packages was recently conducted by Chandar and Boppana 33 .…”

Section: Several Models and Simulation Methodologies Aimed At Modellimentioning

confidence: 99%

Three-dimensional fluid-structure interaction simulations of a yarn subjected to the main nozzle flow of an air-jet weaving loom using a Chimera technique

Delcour

Peeters

Degroote

2019

Textile Research Journal

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In air-jet weaving looms, the main nozzle pulls the yarn from the prewinder by means of a high velocity air flow. The flexible yarn is excited by the flow and exhibits high amplitude oscillations. The motion of the yarn is important for the reliability and the attainable speed of the insertion. Fluid-structure interaction simulations calculate the interaction between the air flow and the yarn motion and could provide additional insight into yarn behavior. However, the use of an arbitrary Lagrangian–Eulerian approach for the deforming fluid domain around a flexible yarn typically results in severe mesh degradation, vastly reducing the accuracy of the calculations or limiting the physical time that can be simulated. In this research, the feasibility of using a Chimera technique to simulate the motion of a yarn interacting with the air flow from a main nozzle was investigated. This methodology combines a fixed background grid with a moving component grid deforming along with the yarn. The component grid is, however, not constrained by the boundaries of the flow domain allowing for large deformations with limited mesh degradation. Two separate cases were investigated. In the first case, the yarn was considered to be clamped at the main nozzle inlet. For the second case, the yarn was allowed to move axially as the main nozzle pulled it from a drum storage system.

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Section: Several Models and Simulation Methodologies Aimed At Modellimentioning

confidence: 99%

Three-dimensional fluid-structure interaction simulations of a yarn subjected to the main nozzle flow of an air-jet weaving loom using a Chimera technique

Delcour

Peeters

Degroote

2019

Textile Research Journal

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“…The capability of FLOWer for wind turbine simulations has been shown in several projects. The interaction of a wind turbine in complex terrain with atmospheric turbulence was investigated by Schulz et al (2016a) and code to code comparisons were recently conducted in the European AVATAR project (Schepers et al, 2016).…”

Section: Cfd Solvermentioning

confidence: 99%

“…Furthermore, the new coupling can be restarted, allowing much longer simulation times if FLOWer runs on clusters with limited job duration. It was already successfully applied to the blade of a generic 10 MW turbine for comparison reasons by Sayed et al (2016), who implemented a coupling of FLOWer to the structural dynamics solver Carat++.…”

Section: Fluid-structure Interactionmentioning

confidence: 99%

Advanced computational fluid dynamics (CFD)–multi-body simulation (MBS) coupling to assess low-frequency emissions from wind turbines

et al. 2018

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Abstract. The low-frequency emissions from a generic 5 MW wind turbine are investigated numerically. In order to regard airborne noise and structure-borne noise simultaneously, a process chain is developed. It considers fluid–structure coupling (FSC) of a computational fluid dynamics (CFD) solver and a multi-body simulations (MBSs) solver as well as a Ffowcs-Williams–Hawkings (FW-H) acoustic solver. The approach is applied to a generic 5 MW turbine to get more insight into the sources and mechanisms of low-frequency emissions from wind turbines. For this purpose simulations with increasing complexity in terms of considered components in the CFD model, degrees of freedom in the structural model and inflow in the CFD model are conducted. Consistent with the literature, it is found that aeroacoustic low-frequency emission is dominated by the blade-passing frequency harmonics. In the spectra of the tower base loads, which excite seismic emission, the structural eigenfrequencies become more prominent with increasing complexity of the model. The main source of low-frequency aeroacoustic emissions is the blade–tower interaction, and the contribution of the tower as an acoustic emitter is stronger than the contribution of the rotor. Aerodynamic tower loads also significantly contribute to the external excitation acting on the structure of the wind turbine.

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“…Furthermore, the new coupling can be restarted, allowing much longer simulation times if FLOWer runs on clusters with limited job duration. It was already successfully applied on the blade of a generic 10M W turbine for comparison reasons by Sayed et al (2016) who implemented a coupling of FLOWer to the structural dynamics solver Carat++.…”

Section: Fluid-structure Interactionmentioning

confidence: 99%

Advanced CFD-MBS coupling to assess low-frequency emissions from wind turbines

Klein

Gude

Wenz

et al. 2018

Preprint

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Abstract. The low-frequency emissions from a generic 5 MW turbine are investigated numerically. In order to regard airborne noise and structure-borne noise simultaneously a process chain was developed. It considers fluid-structure coupling (FSC) of a computational fluid dynamics (CFD) solver and multibody simulations (MBS) solver as well as a Ffowcs Williams-Hawkings (FW-H) acoustic solver. The approach was applied to a generic 5 MW turbine to get more insight into the sources and mechanisms of low-frequency emissions from wind turbines. For this purpose simulations with increasing complexity in terms of considered components in the CFD model, degrees of freedom in the structural model and inflow in the CFD model were conducted. Consistent with literature, it has been found that aeroacoustic low-frequency emission is dominated by the blade-passing frequency harmonics. The tower base loads, which excite seismic emission, tend to be dominated by structural eigenfrequencies with increasing complexity of the model. The main source of aeroacoustic emissions is the blade-tower interaction and the contribution of the tower as an acoustic emitter is stronger than the contribution of the rotor. Aerodynamic tower loads also significantly contribute to the external excitation acting on the structure of the wind turbine.

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High fidelity CFD-CSD aeroelastic analysis of slender bladed horizontal-axis wind turbine

Cited by 23 publications

References 12 publications

Three-dimensional fluid-structure interaction simulations of a yarn subjected to the main nozzle flow of an air-jet weaving loom using a Chimera technique

Three-dimensional fluid-structure interaction simulations of a yarn subjected to the main nozzle flow of an air-jet weaving loom using a Chimera technique

Advanced computational fluid dynamics (CFD)–multi-body simulation (MBS) coupling to assess low-frequency emissions from wind turbines

Advanced CFD-MBS coupling to assess low-frequency emissions from wind turbines

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