A review on the wake aerodynamics of H-rotor vertical axis wind turbines

Peng, H.Y.; Liu, H.J.; Yang, Jian

doi:10.1016/j.energy.2021.121003

Cited by 20 publications

(3 citation statements)

References 108 publications

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“…1b and 3f). Here, we use helical horizontal axis wind turbines (HAWT), which consist of three rotor blades (for further information and a schematic illustration of helical HAWT wind turbines, see Peng et al, 2021). We modified the smallest available version (which generates 300 W power) with wings half the length to reduce the mechanical stress on the system.…”

Section: Additional Wind Generatormentioning

confidence: 99%

Towards a self-sufficient mobile broadband seismological recording system for year-round operation in Antarctica

Eckstaller

Asseng²,

Lippmann³

et al. 2022

Geosci. Instrum. Method. Data Syst.

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Abstract. Passive seismic measurements allow the study of the deeper Earth beneath the thick Antarctic ice sheet cover. Due to logistical and weather constraints, only a fraction of the area of the Antarctic ice sheet can be surveyed with long-term or temporary sensors. A fundamental limitation is the power supply and operation of the instruments during the polar winter. In addition, there is only a limited time window during the field seasons to deploy the stations over the year. Here we present a rapidly and simple deployable self-sufficient mobile seismic station concept. The station consists of different energy supply modules aligned according to the survey needs, measuring duration, and survey aim. Parts of the concept are integrated into an already existing pool of mobile stations and in the seismological network of the geophysical observatory at Neumayer III Station. Other concepts and features are still under development. The overall goal is to use these temporary mobile arrays in regions where little is known about local and regional tectonic earthquake activity.

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Section: Additional Wind Generatormentioning

confidence: 99%

Towards a self-sufficient mobile broadband seismological recording system for year-round operation in Antarctica

Eckstaller

Asseng²,

Lippmann³

et al. 2022

Geosci. Instrum. Method. Data Syst.

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“…One of the major challenges of CFD modelling, to predict the aerodynamic behaviour and performance of VAWTs, is to accurately simulate the highly complex flow in the near-blades and the wake regions of the turbine [2]. This is further compounded by the turbulence in incident air as flow turbulence is inherently a 3D phenomenon, and its modelling in 2D can lead to significantly erroneous predictions of the flow fields associated with VAWTs [3]. The inability of 2D modelling to accurately capture the blade tip vortices is another key factor to be considered while developing numerical models of VAWTs.…”

Section: Introductionmentioning

confidence: 99%

“…This approach helps in evaluating the transition from near-field to far-field wake dynamics [4]. Comparative analysis between near-wake and far-wake models show that the former is a useful tool for designing wind turbine farms [3]. Another effective approach for wake dynamic evaluation is the use of Brown's Vorticity Transport Model (VTM), where the vorticity field in the vicinity of the wind turbine is analysed to quantify the vertical extent of the wake downstream of the rotor.…”

Section: Introductionmentioning

confidence: 99%

Effects of Damaged Rotor on Wake Dynamics of Vertical Axis Wind Turbines

Asim

Islam

2021

Energies

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Vertical Axis Wind Turbines (VAWTs) are omnidirectional turbomachines commonly used in rural areas for small-to-medium-scale power generation. The complex flow observed in the wake region of VAWTs is affected by a number of factors, such as rotor blades design. A damaged rotor significantly alters the flow field in the wake region of the VAWT, degrading its power generation capability. Published literature on damaged wind turbine blades is severely limited to torque signal analysis and basic flow field description in the wake region. In this study, detailed numerical investigations have been carried out to establish and quantify the relationship between damaged rotor and the wake dynamics of a VAWT. Time-based Computational Fluid Dynamics analyses have been performed on two VAWT models, one undamaged and the other with a missing rotor blade. Proper Orthogonal Decomposition has been used to extract the energy content and temporal coefficients of the various flow patterns associated with the wake region. The results indicate that the first pressure-based flow mode contains 99% of the energy and provides a functional basis for accurate reconstruction of the wake. It is envisaged that this study will aid the development of novel machine learning algorithms for rotor damage detection in wind farms.

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Transport hydrodynamics of catalytic particles in gradient cyclonic flow field and reaction characteristics to produce bio-oil

Zhang

et al. 2023

Advanced Powder Technology

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A review on the wake aerodynamics of H-rotor vertical axis wind turbines

Cited by 20 publications

References 108 publications

Towards a self-sufficient mobile broadband seismological recording system for year-round operation in Antarctica

Towards a self-sufficient mobile broadband seismological recording system for year-round operation in Antarctica

Effects of Damaged Rotor on Wake Dynamics of Vertical Axis Wind Turbines

Transport hydrodynamics of catalytic particles in gradient cyclonic flow field and reaction characteristics to produce bio-oil

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