Modelling of Ice Throw and Noise from Wind Turbines
| dc.contributor.advisor | Taylor, Peter | |
| dc.contributor.author | Biswas, Sumita | |
| dc.date.accessioned | 2021-11-15T15:52:42Z | |
| dc.date.available | 2021-11-15T15:52:42Z | |
| dc.date.copyright | 2021-07 | |
| dc.date.issued | 2021-11-15 | |
| dc.date.updated | 2021-11-15T15:52:42Z | |
| dc.degree.discipline | Earth & Space Science | |
| dc.degree.level | Doctoral | |
| dc.degree.name | PhD - Doctor of Philosophy | |
| dc.description.abstract | To assess the impact of the issues related to ice throw and noise from the wind turbine two independent mathematical models were developed. A model of the trajectories of ice fragments thrown from a rotating wind turbine blade is used to estimate the ground impact locations that could occur under different scenarios. Wind speed, ejection position on the blade and turbine rotation rate play a role in determining the impact point, as well as mass, density and drag coefficient of the ice fragment. For 'compact' ice fragments, the trajectory depends on the combination CDA/M where CD is the drag coefficient, A is the frontal area and M the mass of the ice fragment. Sensitivity tests show that ice fragments can travel further laterally for low CD and further downwind for high CD. For plate-like fragments, aerodynamic lift can increase the distance travelled if the plate maintains an orientation to maximize lift. Although this may be a relatively rare event, but result from the simulation shows a case, where a 1 kg plate-like fragment could travel up to 350 m from the base of the turbine. Another model based on the ray theory is developed to simulate propagation of sound from a point source. The model incorporates propagation loss, loss due to refraction, ground interaction and atmospheric absorption. Sound pressure level at a specific distance from the sound source can be calculated using the model. Variation in the terrain feature is included to investigate its impact on the ray trajectory. | |
| dc.identifier.uri | http://hdl.handle.net/10315/38770 | |
| dc.language | en | |
| dc.rights | Author owns copyright, except where explicitly noted. Please contact the author directly with licensing requests. | |
| dc.subject | Atmospheric sciences | |
| dc.subject.keywords | Renewable energy | |
| dc.subject.keywords | Sound | |
| dc.subject.keywords | Wind turbine | |
| dc.title | Modelling of Ice Throw and Noise from Wind Turbines | |
| dc.type | Electronic Thesis or Dissertation |
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