Results 41 to 50 of about 2,255,502 (294)

An Analysis of Variable-Speed Wind Turbine Power-Control Methods with Fluctuating Wind Speed [PDF]

Energies, 2013
Variable-speed wind turbines (VSWTs) typically use a maximum power-point tracking (MPPT) method to optimize wind-energy acquisition. MPPT can be implemented by regulating the rotor speed or by adjusting the active power. The former, termed speed-control mode (SCM), employs a speed controller to regulate the rotor, while the latter, termed power-control
Yun-Su Kim, Il-Yop Chung, Seung-Il Moon
openaire   +3 more sources

Fully-coupled modeling and analysis of the influence of anti-icing bleed air system of engine inlet duct on compressor performance

Case Studies in Thermal Engineering
A fully-coupled method that integrates the compressor, inlet duct and anti-icing bleed air system (AI-BAS) was established to offer a quick prediction of the effects of anti-icing bleeding on compressor performance, facilitating the development of a ...
Zuojun Wei, Cheng Li, Guangming Ren, Xiaohua Gan   +3 more
doaj   +1 more source

Preliminary design and key components validation of modular recuperated micro gas turbine for small unmanned systems

Case Studies in Thermal Engineering
This paper presents an overview of the preliminary design of a modular recuperated micro gas turbine for small unmanned systems, demonstrating the technical feasibility of this integrated power solution.
Zuojun Wei, Wenhua Duan, Haotian Gao, Cunju Wei, Guangming Ren, Xiaohua Gan   +5 more
doaj   +1 more source

Wind tunnel test study on the influence of slat end size changes in transport aircraft

Hangkong gongcheng jinzhan
For conventional layout civil transport aircraft in a low-speed and high lift configuration, the premature of the stall angle of attack causes the aircraft's approach speed to be too high.
YAN Wei, XU Huiwen, LI Jinye, ZHANG Ziyang, ZHANG Meihong, ZHAO Keliang, YANG Kai, YAN Wencheng   +7 more
doaj   +1 more source

Wind field and pressure characteristics on wind turbine surface under moving thunderstorms

Energy Reports, 2023
Based on computational fluid dynamics and large-eddy simulation technologies, a numerical simulation method of a moving thunderstorm field is established by considering the impinging jet model.
Chuncheng Liu, Siyu Ma, Zhao Yan, Chengbo Li   +3 more
doaj   +1 more source

Wind Speed Perception and Risk

PLoS ONE, 2012
How accurately do people perceive extreme wind speeds and how does that perception affect the perceived risk? Prior research on human-wind interaction has focused on comfort levels in urban settings or knock-down thresholds. No systematic experimental research has attempted to assess people's ability to estimate extreme wind speeds and perceptions of ...
Agdas, Duzgun, Webster, Gregory D., Masters, Forrest J.   +2 more
openaire   +5 more sources

Introduction to special issue on high speed solar wind streams and geospace interactions (HSS-GI) [PDF]

, 2009
This special issue of the Journal of Atmospheric and Solar-Terrestrial Physics is devoted to research into high speed solar wind streams (HSSs) and their effects on the region of near-Earth space commonly known as ‘geospace’.
Morley, S.K., Denton, M.H, Horne, Richard B, Borovsky, J.E., Tsurutani, B.T., Denton, M.H., Horne, R.B., McPherron, R.L.   +7 more
core   +1 more source

Quantifying the effects of airflow distortion on anemometer wind speed measurements from merchant ships [PDF]

, 2003
Anemometers on Voluntary Observing Ships (VOS) are usually located above the bridge in a region where the effects of air flow distortion, created by the presence of the ship, may be large.
Moat, B.I., Moat, Bengamin I., Moat, Bengamin I   +2 more
core   +1 more source

Predictive control of wind turbines by considering wind speed forecasting techniques [PDF]

, 2009
A wind turbine system is operated such that the points of wind rotor curve and electrical generator curve coincide. In order to obtain maximum power output of a wind turbine generator system, it is necessary to drive the wind turbine at an optimal rotor ...
Jovanovic, Milutin, Narayana, Mahinsasa, Putrus, Ghanim, Lung, P. S.   +3 more
core  

Early Body Mass Index z‐Score Change and Resolution of Severe Malnutrition in Children With Sickle Cell Anemia in a Low‐Income Setting: A Prospective Single‐Arm Extension Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with sickle cell anemia (SCA) in low‐income settings are at risk of severe malnutrition, but optimal nutritional management has not been established. We evaluated an intensified ready‐to‐use therapeutic food (RUTF) regimen in children with persistent severe malnutrition after initial treatment and assessed whether early ...
Safiya Gambo, Shehu Umar Abdullahi, Hassan Adam Murtala, Halima Kabir, Khadija A. Shamsu, Sari A. Acra, Virginia A. Stallings, Mark Rodeghier, Michael R. DeBaun, Lauren J. Klein   +9 more
wiley   +1 more source