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Xiaofang Wang

Bio: Xiaofang Wang is an academic researcher from Dalian University of Technology. The author has contributed to research in topics: Aerodynamics & Turbine. The author has an hindex of 2, co-authored 2 publications receiving 20 citations.

Papers
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Journal ArticleDOI
15 Nov 2019-Energy
TL;DR: In this article, the effects of Gurney flaps on the aerodynamic performance of a horizontal axis wind turbine, which is part of the EU FP7 AVATAR project, were investigated.

29 citations

Journal ArticleDOI
15 Jan 2019-Energy
TL;DR: In this paper, both RANS and DDES simulations are performed using OpenFOAM in order to predict the aerodynamic characteristics of the wind turbine rotor rotor, and the complex and unsteady root flow characteristics are comprehensively investigated.

22 citations


Cited by
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Journal Article
01 Jan 2016-Pramana
TL;DR: Comparisons of experimental results and complimentary computations for airfoils with vortex generators are compared and indicate that with appropriate calibration, engineering-type tools can capture the effects of vortex generators and outperform more complex tools.
Abstract: Experimental results and complimentary computations for airfoils with vortex generators are compared in this paper, as part of an e_ort within the AVATAR project to develop tools for wind turbine blade control devices. Measurements from two airfoils equipped with passive vortex generators, a 30% thick DU97W300 and an 18% thick NTUA T18 have been used for benchmarking several simulation tools. These tools span low-to-high complexity, ranging from engineering-level integral boundary layer tools to fully-resolved computational uid dynamics codes. Results indicate that with appropriate calibration, engineering-type tools can capture the e_ects of vortex generators and outperform more complex tools. Fully resolved CFD comes at a much higher computational cost and does not necessarily capture the increased lift due to the VGs. However, in lieu of the limited experimental data available for calibration, high _delity tools are still required for assessing the e_ect of vortex generators on airfoil performance.

32 citations

Journal ArticleDOI
TL;DR: In this article, the aerodynamic performance of an X-wing bio-inspired flapping wing micro air vehicle (MAV) underlying clap-and-fling motion by means of force and flow field measurements was explored.

29 citations

Journal ArticleDOI
01 Feb 2021-Energies
TL;DR: This review performs a comprehensive and up-to-date literature survey of selected flow-control devices, from their time of development up to the present, along with a comparative analysis centered on their aerodynamic controllability.
Abstract: It is projected that, in the following years, the wind-energy industry will maintain its rapid growth over the last few decades. Such growth in the industry has been accompanied by the desirability and demand for larger wind turbines aimed at harnessing more power. However, the fact that massive turbine blades inherently experience increased fatigue and ultimate loads is no secret, which compromise their structural lifecycle. Accordingly, this demands higher overhaul-and-maintenance (O&M) costs, leading to higher cost of energy (COE). Introduction of flow-control devices on the wind turbine is a plausible solution to this issue. Flow-control mechanisms feature the ability to effectively enhance/suppress turbulence, advance/delay flow transition, and prevent/promote separation, leading to enhancement in aerodynamic and aeroacoustics performance, load alleviation and fluctuation suppression, and eventually wind turbine power augmentation. These flow-control devices are operated primarily under two schemes: passive and active control. Development and optimization of flow-control devices present the potential for reduction in the COE, which is a major challenge against traditional power sources. This review performs a comprehensive and up-to-date literature survey of selected flow-control devices, from their time of development up to the present. It contains a discussion on the current prospects and challenges faced by these devices, along with a comparative analysis centered on their aerodynamic controllability. General considerations and conclusive remarks are presented after the discussion.

23 citations

Journal ArticleDOI
12 Feb 2020
TL;DR: In this article, a critical review of the existing approaches that are used to estimate the hydrodynamic and aerodynamic loads on FOWTs, and to determine the structures' motion and elastic responses due to the combined loads.
Abstract: Wind energy industry is expanded to offshore and deep water sites, primarily due to the stronger and more consistent wind fields. Floating offshore wind turbine (FOWT) concepts involve new engineering and scientific challenges. A combination of waves, current, and wind loads impact the structures. Often under extreme cases, and sometimes in operational conditions, magnitudes of these loads are comparable with each other. The loads and responses may be large, and simultaneous consideration of the combined environmental loads on the response of the structure is essential. Moreover, FOWTs are often large structures and the load frequencies are comparable to the structural frequencies. This requires a fluid–structure–fluid elastic analysis which adds to the complexity of the problem. Here, we present a critical review of the existing approaches that are used to (i) estimate the hydrodynamic and aerodynamic loads on FOWTs, and (ii) to determine the structures’ motion and elastic responses due to the combined loads. Particular attention is given to the coupling of the loads and responses, assumptions made under each of the existing solution approaches, their limitations, and restrictions, where possible, suggestions are provided on areas where further studies are required.

19 citations

Journal ArticleDOI
01 Jun 2021-Energy
TL;DR: In this paper, the effects of jet blowing on blade suction side of NREL phase VI horizontal axis wind turbine (HAWT ) for alleviation of degraded flow due to boundary layer separation were investigated.

15 citations