Article
Energy & Fuels
Alois Peter Schaffarczyk, Andreas Momber, Volkmar Stenzel
Summary: In a large acoustic wind tunnel, a well-known 30% thick wind turbine aerofoil was partially equipped with riblets, resulting in a reduction of drag by up to 10% and an increase in lift-to-drag ratio by up to 30%.
Article
Engineering, Civil
Ileana Calotescu, Stefano Torre, Andrea Freda, Giovanni Solari
Summary: The study investigates the aerodynamic coefficients of telecommunication lattice towers, exploring the influence of ancillary elements through wind tunnel tests. Different models, including bare, equipped with additional elements, and fully installed with antennas, were tested to examine the effect of cross-sections of elements on aerodynamic coefficients.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Mechanical
Jiajia Chen, Shaodong Jiang, Zheng Zhou, Mengyu Zhang, Xiaoke Ming, Ning Guo
Summary: This paper analyzes the lateral control technology of autonomous semi-trailer trucks. It proposes a parametric self-learning model predictive control based on the Proximal Policy Optimization of One Step method to solve the problems of traditional lateral control algorithms. The proposed method combines the MPC method with a deep reinforcement learning algorithm named OSPPO to improve adaptability and effectiveness. Simulation and experimental results demonstrate the validity and advantages of the proposed method.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2023)
Article
Thermodynamics
Kun Wang, Wei Xia, Jiayuan Ren, Weiwei Yu, Haocheng Feng, Shuling Hu
Summary: This study investigates the environmental adaptation of wind energy harvesters by mimicking the fluttering of leaves. Through aeroelastic modeling and laboratory testing of Palm leaves, the mechanism of leaf flutter is understood and an artificial leaf wind energy harvester is designed and tested in a wind tunnel. The study highlights the bio-inspired design of wind energy harvesters with low cut-in wind speed and stable output frequency.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Jihyuk Jeong, Alla Eddine Benchikh Le Hocine, Sergio Croquer, Sebastien Poncet, Benoit Michel, Jocelyn Bonjour
Summary: The present work presents a numerical simulation of heat transfer inside a refrigerated truck trailer equipped with eutectic plates. The results indicate that during the door opening period, placing the eutectic plates on the roof of the trailer leads to lower average temperatures inside the trailer compared to placing them on the back. However, the presence of cargo eliminates the formation of specific zones and limits the infiltration of outside air.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Civil
Andrea Giachetti, Gianni Bartoli, Claudio Mannini
Summary: This study investigates the aerodynamic effects of a non-porous screen placed close to the front face of a tall building with a square base. The experiments reveal that the screen has a significant impact on the building's aerodynamics, including a decrease in mean pressure in the upstream part of the side faces, faster recovery of pressure towards the back corners, and an increase in the slope of the lateral force coefficient.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2022)
Article
Engineering, Multidisciplinary
Stjepan Galambos, Nenad Poznanovic, Nebojsa Nikolic, Dragan Ruzic, Jovan Doric
Summary: This paper presents the procedure for designing, analyzing, and verifying the geometric parameters of an airfoil-shaped aerodynamic spoiler on the cabin of a semi-trailer truck. The procedure uses experimental design and response surface methodology to optimize the shape and position of the spoiler, with both virtual and physical experiments conducted. The results were validated through wind tunnel tests.
TEHNICKI VJESNIK-TECHNICAL GAZETTE
(2022)
Article
Construction & Building Technology
Zitao Jiang, Tomohiro Kobayashi, Toshio Yamanaka, Mats Sandberg, Narae Choi, Noriaki Kobayashi, Kayuki Sano, Kota Toyosawa
Summary: This paper presents a wind tunnel experiment to assess the influence of urban density on the ventilation rate of single-sided ventilation. It is found that a higher building density decreases the ventilation performance of windward opening cases and increases the ventilation performance of the leeward opening cases.
BUILDING AND ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Yuxuan Chen, Guanglei Gao, Long Wang, Guodong Ding, Ying Zhang, Yang Zhao
Summary: This study determined the wind erodibility of different types of sand dunes in the Ulan Buh Desert and investigated its relationship with soil properties and wetting processes. The results showed that soil organic matter and calcium carbonate were positively correlated with wind erodibility, while coarse soil particles were negatively correlated with wind erodibility. Wetting processes had a significant impact on wind erodibility.
Article
Engineering, Marine
Huawu Zhang, Yihuai Hu, Jianhai He
Summary: This paper introduces a ship's wind energy utilization device with multi-mode arc-shaped sails, which can be used for sail-assisting or wind power generation according to the ship's navigation. Wind tunnel experiments have confirmed the energy-saving effect and comprehensive energy utilization of this device.
POLISH MARITIME RESEARCH
(2022)
Article
Agronomy
Gabor Negyesi, Szilard Szabo, Botond Buro, Safwan Mohammed, Jozsef Loki, Kalman Rajkai, Imre J. Holb
Summary: The study showed that irrigation levels and soil texture have significant impacts on soil crust formation and evaporation rates in wind erosion risk environments, which can help local governments take measures to prevent wind erosion in agricultural areas.
Article
Thermodynamics
Biyi Cheng, Yingxue Yao
Summary: In this work, a data-driven surrogated model based on ANN, SVR, GPR, and DTR is proposed to regress the experimental data of aerodynamic forces. Meanwhile, a novel UDWT and two H-type VAWTs are manufactured to investigate the aerodynamic forces of wind turbines. The results demonstrate that the SVM- and GPR-based regression models have better fitting ability with R2 larger than 0.99, and the ANN-based surrogated model can reproduce the fluctuation of experiment data due to its best learning ability. Additionally, the UDWT outperforms H-type wind turbines at azimuth angles of 90 degrees and 270 degrees.
Article
Environmental Sciences
Annika Hoffmann, Roger Funk, Marina E. H. Mueller
Summary: The ability of Fusarium conidiospores to disperse via wind was studied in a wind tunnel, with results showing that wind alone may have been overestimated as a dispersal medium. Further research should investigate the importance of carrier media or linkers combined with wind dispersal.
Article
Computer Science, Information Systems
Younghoon Seo, Kwanghyun Cho, Kanghyun Nam
Summary: This paper presents an integrated motion control method for an electric vehicle equipped with a front/rear steer-by-wire system and four in-wheel motors, aiming to maintain stable cornering.
Article
Environmental Sciences
Majid Shirazi Basiri, Alireza Shirneshan, Mohammad Hojaji
Summary: This study investigates the effects of vehicle traffic conditions, fuel type, and vehicle size on the emission and dispersion of pollutants from exhaust pipes. The results show that pollutant concentration decreases along the tailpipe centerline and varies with different flow conditions.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
