Results 31 to 40 of about 2,207,326 (232)

Analysis of parameters influencing build accuracy of a SLM printed compressor outlet guide vane [PDF]

, 2018
The paper describes the manufacture of an outlet guide vane (OGV) of jet engines by the Selective Laser Melting (SLM) process, in view of current challenges for conventional machining approaches such as; high airfoil profile tolerances, limited tooling ...
Appleby, John, Wood, Paul, Otubusin, Adetayo, Adamczuk, Rafael   +3 more
core   +1 more source

Rotating Turbulent Flow Simulation with LES and Vreman Subgrid-Scale Models in Complex Geometries

Advances in Mechanical Engineering, 2014
The large eddy simulation (LES) method based on Vreman subgrid-scale model and SIMPIEC algorithm were applied to accurately capture the flowing character in Francis turbine passage under the small opening condition.
Tao Guo, Lixiang Zhang, Wenquan Wang, Zhumei Luo   +3 more
doaj   +1 more source

Influence of IGV Opening Degree on the Compressor Efficiency of MITSUBISHI F4 Gas Turbine

发电技术, 2020
Compressor is an important equipment of gas turbine. The maximum output capacity and performance of the gas turbine is directly affected by the performance of the compressor.
Jihui FANG, Rong WANG
doaj   +1 more source

Numerical Investigation of the Flow Regime in the Vanes and the Torsional Self-Excited Vibration of Guide Vane in the Pump Mode of a Reversible Pump-Turbine

, 2022
Guide vanes (GVs) are installed between the runner and the stay vanes for flow guidance and discharge regulation in reversible pump-turbines. The unstable torsional self-excited vibration of the guide vane (GV) may occur when running at small guide vane ...
Lingjiu Zhou, Wenzhe Kang, Quanwei Liang, Zhengwei Wang   +3 more
core   +1 more source

Two‐Step Thermal Upcycling of Flexible Printed Circuit Board Waste Into Metallic Copper Nanoparticles: Synthesis and Characterization

Advanced Materials Technologies, EarlyView.
A two‐step thermal upcycling process converts flexible printed circuit board waste into high‐purity copper nanoparticles using polymer degradation and arc discharge. The synthesized nanoparticles exhibit controlled morphology and high metal purity.
Bikesh S. Ghinangju, Rumana Hossain, Veena Sahajwalla   +2 more
wiley   +1 more source

Variable Universe Fuzzy Control of Adjustable Hydraulic Torque Converter Based on Multi-Population Genetic Algorithm

IEEE Access, 2019
In order to optimize the control method of guide vane opening in an adjustable hydraulic torque converter, this paper presents a variable universe fuzzy control method for servo system of the adjustable hydraulic torque converter based on the multi ...
Li Mingxue, Yang Guolai, Li Xiaoqing, Bai Guixiang   +3 more
doaj   +1 more source

Distribution Features of Flow Patterns and Pressure Pulsations of Pump-Turbine in Five Operating Modes on the Four-Quadrant Plane

Frontiers in Energy Research, 2022
To meet the demand of the power grid for flexible regulation, pump turbines have to frequently and fleetly stop, start, and transition between different modes, causing many instability problems.
Dongliang Hu, Yongguang Cheng, Pengcheng Zhang, Xi Wang, Jinghuan Ding, Xiaoxi Zhang   +5 more
doaj   +1 more source

Nonlocomotory Robotic Strategies for Dynamic Rotation Control in Terrestrial Robots: A Review

Advanced Robotics Research, EarlyView.
Terrestrial robots increasingly require rapid body rotation to maintain stability and agility in complex environments. This review shows nonlocomotory rotational control strategies that operate without ground contact, including reaction wheels, tails, bars, limbs, and thrusters.
Y. Liang, J. An, X. Zheng, D. Wang, S. Wang, X. Wang, P. Zhu, J. Pei, S. Li, J. Paripurana, Y. Han, Z. Tang, X. Gan, Q. He, X. Ma   +14 more
wiley   +1 more source

Fail-safe design and analysis for the guide vane of a hydro turbine

Advances in Mechanical Engineering, 2016
A design for the fail-safe mechanism of a guide vane in a Francis-type hydro turbine is proposed and analyzed. The mechanism that is based on a shear pin as a sacrificial component was designed to remain simple.
Bentang Arief Budiman, Djoko Suharto, Indra Djodikusumo, Muhammad Aziz, Firman Bagja Juangsa   +4 more
doaj   +1 more source

Unsteady computational fluid dynamics analysis of the hydrodynamic instabilities in a reversible Francis turbine used in a storage plant

Heliyon, 2019
The hydraulic storage plants play a strategic role in the management of large electrical networks. Besides the widely known capability to store and provide great amount of energy, in a green and efficient way, these plants are of utmost importance to ...
S. Mauro, R. Lanzafame, S. Brusca, M. Messina   +3 more
doaj   +1 more source