Results 21 to 30 of about 35,990 (188)
Small Horizontal Wind Turbine Design and Aerodynamic Analysis Using Q-Blade Software
مجلة بغداد للعلوم, 2023 Wind energy is one of the most common and natural resources that play a huge role in energy sector, and due to the increasing demand to improve the efficiency of wind turbines and the development of the energy field, improvements have been made to ...
Othman K. Zidane, Yaseen H. Mahmood
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Design parameters and mechanical efficiency of jet wind turbine under high wind speed conditions
Open Engineering, 2023 Turbines are one of the most important means of producing clean energy, as they do not cause any negative emissions affecting the environment. Recently, the need to design turbines capable of facing strong winds has appeared because the currently ...
Dahham Abbas Waheed +9 more
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Blockage Corrections for Tidal Turbines—Application to an Array of Turbines in the Alderney Race
Energies, 2022 Tidal turbines are located in shallow water depths in comparison to their dimensions (15 m-diameter turbines in 40 m depths, typically). Constrained vertically by the water depth and laterally by neighbouring turbines, the flow within a tidal farm is ...
Nasteho Djama Dirieh +3 more
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Advanced design and optimization of wind turbines based on turbine theories [PDF]
, 2019 A review of wind turbine technology showed that many flaws in both the flow models and computations are involved in the traditional fundamentals. While traditional methods for design and computation are all based on the airfoil theory, a new method based
Zhang, Zhengji
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CFD studies of the effect of holes and angles of upstream duct of horizontal axis wind turbines
AIP Advances, 2023 This work presents an approach to the analysis of duct-augmented wind turbines using Computational Fluid Dynamics (CFD). The main objective is to find the optimum duct shape and design that gives maximum boost to the performance of wind turbines.
Syed Noman Danish +2 more
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Energies, 2012 A detailed review of the current state-of-art for wind turbine blade design is presented, including theoretical maximum efficiency, propulsion, practical efficiency, HAWT blade design, and blade loads.
Richard J. Crossley, Peter J. Schubel
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Observation of [CI] toward the GL 2591 and W28 A2 Molecular Outflows [PDF]
, 1994 Molecular outflows associated with GL 2591 and W28 A2 were observed in the 492 GHz [CI] line. Upper limits are set on the [CI] emission in the extremely high velocity line wings. These limits are discussed in terms of wind-driven and jet-driven models of
Choi, Evans, Jaffe, Walker
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A Theory for Power Extraction from Passive Accelerators and Confined Flows
Energies, 2020 No accepted fluid theory exists for power extraction from unpressurized confined flow. The absence of a valid model to determine baseline uniform power extraction in confined flows creates difficulties in characterizing the coefficient of power ...
Robert Freda +2 more
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Flow physics beyond the Betz limit
, 2023 A pivotal theoretical result of the early 20th century demonstrated that the limit of energy extraction for a wind or tidal stream turbine from an unconstrained flow is 16/27 of the upstream kinetic flux passing through the turbine area, known as the ‘Betz Limit’.
openaire +2 more sources
Numerical investigation of the optimum wind turbine sitting for domestic flat roofs
Sustainable Buildings, 2018 The power capacity of roof mounted wind turbines is dependent on several factors which influence its energy yield. In this paper, an investigation has been carried out using Computational Fluid Dynamics (CFD) to determine flow distribution and establish ...
Ishfaq Salman Muhammad +1 more
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