Wind Turbine Aerodynamic Noise Sources

Bertagnolio, Franck; Fischer, Andreas

doi:10.1007/978-3-030-05455-7_70-1

Cited by 5 publications

(8 citation statements)

References 72 publications

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“…The Amiet model [7] is used for TI noise calculation. In a recent study [15], a code-to-code validation was conducted between aeroacoustic frameworks of different research institutions, showing a generally good agreement of the present framework with similar tools. Further details can be found in the original publication.…”

Section: Aeroacoustic Noise Emission Modelsmentioning

confidence: 62%

Automatic detection and correction of aerodynamic imbalances: a noise-based approach

Sucameli,

Bertelè,

Bottasso

2024

J. Phys.: Conf. Ser.

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This paper proposes the use of noise emissions to identify and rectify aerodynamic imbalances. The approach leverages the fact that a pitch imbalance changes the angle of attack at the blade sections, which in turn results in a change in noise emissions. Simulations performed on a 3.35 MW wind turbine show that aerodynamic imbalances significantly affect the Overall Sound Pressure Level at the 1P rotor frequency, more so than mass imbalances, and this effect is furthermore dependent on the microphone placement around the turbine. The rebalancing algorithm is tested through simulations in various scenarios, including both single and multiple concurrent blade imbalances, under different wind speeds and turbulence conditions. The algorithm successfully minimizes aerodynamic imbalances in most cases.

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Section: Aeroacoustic Noise Emission Modelsmentioning

confidence: 62%

Automatic detection and correction of aerodynamic imbalances: a noise-based approach

Sucameli,

Bertelè,

Bottasso

2024

J. Phys.: Conf. Ser.

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“…In detail this procedure is described in [1]. A detailed comparison with other codes and experimental validation data is shown in the publication by Bertagnolio et al [2].…”

Section: Aeroacoustic Analysismentioning

confidence: 99%

“…An overview and limited experimental validation of existent wind turbine noise prediction codes along with detailed code-to-code comparisons with the herein presented approach is part of ongoing work in the IEA Wind TCP Task 39 benchmarking activities, currently limited to TBL-TEN as the dominant noise source and LE/inflow-interaction noise, [2,3]. Note that modeling approaches to combine non-empirical high-fidelity simulations with fast extrapolation techniques are rare, such are high-quality field validation data which cover all relevant quantities This paper demonstrates the capabilities of the mid-fidelity acoustic toolchain to estimate the noise benefits from improved blade designs with winglets using the example of a modified IEA 15 MW turbine from Task 47 which has a diameter of 240 m [12].…”

Section: Introductionmentioning

confidence: 99%

Investigation of a modified IEA 15MW wind turbine including a winglet with a new mid-fidelity acoustic toolchain

Seelemeyer,

Appel

2024

J. Phys.: Conf. Ser.

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This paper presents the applicability of a new hybrid tool chain for wind turbine rotor turbulent boundary-layer trailing-edge noise (TBL-TEN) to complex rotor geometries. The research introduces a rapid, high-fidelity 2D CFD/CAA method, which enables the assessment of innovative low-noise profile designs concerning TBL-TEN, coupled with a mid-fidelity extrapolation technique for the 3D analysis, aiming to minimize computational time essential for design processes. This procedure is applied here to compare the changes in performance, load distribution and noise reduction if a winglet is added to a large-scale wind turbine, using the example of the IEA Wind TCP Task 47 15-MW-reference turbine [12]. In the first step, a 3D CFD calculation of the entire turbine is performed in order to derive the local flow parameters and thus the input variables for the 2D CAA. These results for the 2D TEN are then extrapolated for the entire turbine using the fast summation and extrapolation method TAP (Turbine acoustic prediction) [1]. As only data for the TEN is included here, only this noise source for the winglet can be analyzed. For a more complete comparison, a 3D scale-resolving simulation was set up for a static wind tunnel situation in order to be able to qualitatively classify the tip/vortex interaction noise that was not recorded by the procedure mentioned above.

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“…Bertagnolio et al [27] investigated the possibility of using the coupling of the aeroelastic model HAWC2 and the so-called Formula 1A developed by Farassat to model the ILFN generated by a wind turbine operating upwind. The calculation results obtained with the above model were compared with other models used for modelling wind turbine noise, namely those of Viterna [28,29] and Amiet [30].…”

Section: Introductionmentioning

confidence: 99%

“…Bertagnolio et al [27] analysed the influence of different factors and parameters on the level of the calculated ILFN at a point downstream of the turbine. The following were analysed: the influence of the time window of the Fourier analysis, the influence of the time step, the influence of the blade loading model, the influence of the tower and wind uplift, and the influence of the inflow turbulence and disturbance caused by the operation of the preceding turbine.…”

Section: Introductionmentioning

confidence: 99%

Suitability Analysis of Selected Methods for Modelling Infrasound and Low-Frequency Noise from Wind Turbines

Stępień,

Wszołek,

Mleczko

et al. 2024

Energies

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Wind turbines emit infrasound and low-frequency noise (ILFN), which can be annoying for people living near wind farms. To assess the acoustic impact of wind turbines on the environment, it is essential to model ILFN propagation during the forecasting stage. This study assesses the effectiveness of three commonly used sound propagation models (ISO 9613-2, CNOSSOS-EU for favourable propagation conditions, Nord2000) in predicting ILFN generated by wind turbines. The performance of these models in modelling ILFN is generally not validated or guaranteed. The analysis covers octave frequency bands ranging from 4 Hz to 250 Hz, and comparisons are made against measurements conducted at a wind farm in Poland. Non-parametric statistical tests were used with a significance level of α=0.05 to determine significant differences between measured and predicted results. The results show that the Nord2000 method provides accurate calculations, while the ISO 9613-2 method can be used for simplified assessments of ILFN generated by wind turbines during the investment preparation phase.

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Wind Turbine Aerodynamic Noise Sources

Cited by 5 publications

References 72 publications

Automatic detection and correction of aerodynamic imbalances: a noise-based approach

Automatic detection and correction of aerodynamic imbalances: a noise-based approach

Investigation of a modified IEA 15MW wind turbine including a winglet with a new mid-fidelity acoustic toolchain

Suitability Analysis of Selected Methods for Modelling Infrasound and Low-Frequency Noise from Wind Turbines

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