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Koichi Watanabe, Megumi Matsumoto, Thandar Nwe, Yuji Ohya, Takashi Karasudani and Takanori Uchida
Wind tunnel experiments were conducted by installing wind-acceleration structures on both sides of a straight-bladed vertical-axis wind turbine (VAWT) to improve the output performance of the turbine. In the case of Venturi-shape structures, a curved sha...
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Liu Liu, Bifeng Song, Weigang An, Xiaojun Yang and Jianlin Xuan
People have raised their expectations for UAV performance due to the widespread use of UAVs in both military and non-military settings. One of the most significant fields of research right now is how to enhance UAVs? endurance capabilities. Many birds in...
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Annika Hoffmann, Roger Funk and Marina E. H. Müller
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Takanori Uchida
The scope of the present study was to understand the wake characteristics of wind-turbines under various inflow shears. First, in order to verify the prediction accuracy of the in-house large-eddy simulation (LES) solver, called RIAM-COMPACT, based on a ...
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Hyun-Goo Kim and Wan-Ho Jeon
For the purposes of this study, a wind tunnel experiment and a numerical analysis during ebb and high tides were conducted to determine the positive and negative effects of wind flow influenced by a seawall structure on the performance of wind turbines i...
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Victor P. Stein and Hans-Jakob Kaltenbach
The present paper addresses the evolution of turbulence characteristics in wind turbine wakes immersed in a turbulent boundary layer. The study thereby focuses on finding physically consistent scaling laws for the wake width, the velocity deficit, and th...
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Shoutu Li, Ye Li, Congxin Yang, Xuyao Zhang, Qing Wang, Deshun Li, Wei Zhong and Tongguang Wang
The airfoil plays an important role in improving the performance of wind turbines. However, there is less research dedicated to the airfoils for Vertical Axis Wind Turbines (VAWTs) compared to the research on Horizontal Axis Wind Turbines (HAWTs). With t...
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Koichi Watanabe, Shuhei Takahashi and Yuji Ohya
The effects of using a wind acceleration device (wind lens) with vertical-axis wind turbines in wind tunnel experiments were examined. A wind lens consists of a diffuser and flanges, and this study investigated the optimum parameters of their configurati...
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Fei-Bin Hsiao, Chi-Jeng Bai and Wen-Tong Chong
Three different horizontal axis wind turbine (HAWT) blade geometries with the same diameter of 0.72 m using the same NACA4418 airfoil profile have been investigated both experimentally and numerically. The first is an optimum (OPT) blade shape, obtained ...
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Fei-Bin Hsiao, Chi-Jeng Bai and Wen-Tong Chong
Three different horizontal axis wind turbine (HAWT) blade geometries with the same diameter of 0.72 m using the same NACA4418 airfoil profile have been investigated both experimentally and numerically. The first is an optimum (OPT) blade shape, obtained ...
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Leonardo P. Chamorro and Fernando Porté-Agel
Wind-tunnel experiments were carried out to better understand boundary layer effects on the flow pattern inside and above a model wind farm under thermally neutral conditions. Cross-wire anemometry was used to characterize the turbulent flow structure at...
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Yuji Ohya and Takashi Karasudani
We have developed a new wind turbine system that consists of a diffuser shroud with a broad-ring brim at the exit periphery and a wind turbine inside it. The shrouded wind turbine with a brimmed diffuser has demonstrated power augmentation by a factor of...
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Lei Wang, Xun Zhang, Rong Wan, Qingchang Xu and Guangrui Qi
An orthogonal experiment was conducted to study the effects of the aspect ratio, camber of the fore wing, and gap ratio of front and rear wing panels on the hydrodynamic performance of double-vane otter boards. The design of the orthogonal experiment com...
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Liang Zhang, Dongli Ma, Muqing Yang, Yuan Yao, Yayun Yu and Xiaopeng Yang
This study is meaningful for the design and analysis of the flexible skin wings for long-endurance low-speed aircraft.
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Weihong Kong and You Li
The large reverse flow region of the rotor with a high advance ratio is an important factor that affects the performance improvement of helicopters. This paper examines the dynamic stall of the airfoil in the reverse flow region of the rotor to develop a...
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Jiayu Wen, Yanguo Song, Huanjin Wang and Dong Han
This work presents a systematic approach to analyzing the aerodynamic characteristics of tandem rotor forward autorotation considering rotor-to-rotor interference. The single-rotor computational model trimmed from a generic helicopter flight dynamics ana...
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Chaoqun Li, Shuo Tang, Yi Li and Zihai Geng
To reduce the computational cost, the k-ω" role="presentation">???
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SST turbulence model with Rotation and Curvature correction (SST-RC) is modified to predict the drag of practical aerodynamic configurations mounted with drag-reducing riblet...
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Dong Xie, Peilin Xiao, Ninghua Cai, Lixin Sang, Xiumin Dou and Hanqing Wang
To investigate the pollutant dispersion of a nuclear power plant, a field tracing experiment was carried out in neutral stratification weather with the main wind direction SSW. On this basis, a wind speed profile and turbulence intensity profile consiste...
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Roderick Schildkamp, Jing Chang, Jurij Sodja, Roeland De Breuker and Xuerui Wang
This paper proposes an incremental nonlinear control method for an aeroelastic system?s gust load alleviation and active flutter suppression. These two control objectives can be achieved without modifying the control architecture or the control parameter...
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Satoshi Sekimoto, Kozo Fujii, Masayuki Anyoji, Yuma Miyakawa, Shinichiro Ito, Satoshi Shimomura, Hiroyuki Nishida, Taku Nonomura and Takashi Matsuno
In this study, an experimental investigation of separation control using a dielectric barrier discharge plasma actuator was performed on an NACA0015 airfoil over a wide range of Reynolds numbers, angles of attack, and nondimensional burst frequencies. Th...
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