Results 41 to 50 of about 5,548 (262)

Analysis of synoptic situation and environmental parameters of thunderstorm gales in Hainan

暴雨灾害, 2022
In this study we analyzed the intensity, temporal and spatial distribution, circulation situation and environmental parameters of thunderstorm gale during 2014-2018 in Hainan using regional encrypted automatic station data and sounding data at Haikou ...
Yuanhui KE, Mingming MA, Yan ZHENG, Wen FENG   +3 more
doaj   +1 more source

Field testing of a local wind inflow estimator and wake detector [PDF]

Wind Energy Science, 2020
This paper presents the field validation of a method to estimate the local wind speed on different sectors of a turbine rotor disk. Each rotating blade is used as a scanning sensor that, traveling across the rotor disk, samples the inflow. From the local
J. Schreiber, C. L. Bottasso, M. Bertelè   +2 more
doaj   +1 more source

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source

Analysis of Vertical Wind Shear Effects on Offshore Wind Energy Prediction Accuracy Applying Rotor Equivalent Wind Speed and the Relationship with Atmospheric Stability

Applied Sciences, 2022
If the wind speed that passed through a wind turbine rotor disk area is constant, the hub height wind speed (HHWS) could be representative of the wind speed over the rotor disk area.
Geon Hwa Ryu, Dongjin Kim, Dae-Young Kim, Young-Gon Kim, Sung Jo Kwak, Man Soo Choi, Wonbae Jeon, Bum-Suk Kim, Chae-Joo Moon   +8 more
doaj   +1 more source

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source

Meteorological tower wind shear characteristics, vertical wind speed profile, and surface roughness analysis near the coastline of Chennai [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2019
Extrapolation of wind data is required to estimate wind speeds at high altitudes. Doing so requires an essential understanding of wind shear characteristics related to the location or region.
Poongavanam Sardar Maran
doaj   +1 more source

Hong Kong Airport Wind Shear Now-Casting System Development and Evaluation

Atmosphere, 2022
A wind-shear now-casting system for Hong Kong International Airport is described. The system has been configured and run retrospectively for the period from January to April 2018 at 20-min intervals using two sets of meteorological inputs to quantify ...
Jenny Stocker, Kate Johnson, Rose Jackson, Stephen Smith, Daniel Connolly, David Carruthers, Pak-Wai Chan   +6 more
doaj   +1 more source

Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites

Advanced Engineering Materials, EarlyView.
Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter, Andreas Bezold, Johan Westraadt, Katharina Fiegl, Subham Chattoraj, Benjamin Wahlmann, Carolin Körner, Michael Mills, Mathias Göken, Steffen Neumeier   +9 more
wiley   +1 more source

The Predictability of Idealized Tropical Cyclones in Environments With Time‐Varying Vertical Wind Shear

Journal of Advances in Modeling Earth Systems, 2017
This study describes ensembles of idealized tropical cyclone (TC) simulations conducted within a new modeling framework that allows for time‐varying environments.
Peter M. Finocchio, Sharanya J. Majumdar
doaj   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source