Results 31 to 40 of about 674 (262)

Dynamic System Modeling of a Hybrid Neural Network with Phase Space Reconstruction and a Stability Identification Strategy

Machines, 2022
Focusing on the identification of dynamic system stability, a hybrid neural network model is proposed in this research for the rotating stall phenomenon in an axial compressor.
Mingming Zhang, Jia Zhang, Anping Hou, Aiguo Xia, Wei Tuo   +4 more
doaj   +1 more source

Effect of Circumferential Single Casing Groove Location on the Flow Stability under Tip-Clearance Effect in a Transonic Axial Flow Compressor Rotor

Energies, 2021
Numerical simulations have been performed to study the effect of the circumferential single-grooved casing treatment (CT) at multiple locations on the tip-flow stability and the corresponding control mechanism at three tip-clearance-size (TCS) schemes in
Xiaoxiong Wu, Bo Liu, Botao Zhang, Xiaochen Mao   +3 more
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Comparison and Sensibility Analysis of Warning Parameters for Rotating Stall Detection in an Axial Compressor

International Journal of Turbomachinery, Propulsion and Power, 2020
The present paper aims at evaluating the surveillance parameters used for early stall warning in axial compressors, and is based on unsteady pressure measurements at the casing of a single stage axial compressor.
Gabriel Margalida, Pierric Joseph, Olivier Roussette, Antoine Dazin   +3 more
doaj   +1 more source

A Unified Framework for Compressor Stall Inception

Volume 10: Turbomachinery — Axial Flow Fan & Compressor Aerodynamics; Axial Flow Turbine Aerodynamics
Abstract This paper presents a first-of-a-kind description of compressor rotating stall inception that explains the two different routes to stall reported in the literature over the past four decades. A low-order dynamic system model, an actuator disk analysis, is shown to capture these two transient, stall inception behaviors, namely
Grimshaw, Samuel, Pullan, graham, Greitzer, Edward, Spakovszky, Zoltan   +3 more
openaire   +2 more sources

Steering Oxygen Activation Pathways via Redox Dual‐Defects in 2D Hydrated WO3 for High‐Yield Singlet Oxygen Evolution

Advanced Functional Materials, EarlyView.
Redox dual‐defects (Cs substitution and O vacancies) in 2D hydrated WO3 steer O2 activation toward selective singlet oxygen evolution. WO‐CO achieves 8.6–15.8 times higher 1O2 production than single‐defect or pristine catalysts, enabling efficient pollutant mineralization via a pathway‐selective photocatalytic mechanism.
Sheng‐Qi Guo, Mingqi Xiao, Fangyuan Zhang, Hui Li, Yuli Jia, Zhenfang Zhang, Liqun Ye, Bo Yang, Tianyi Ma   +8 more
wiley   +1 more source

Simulation of Broadband Noise Sources of an Axial Fan under Rotating Stall Conditions

Advances in Mechanical Engineering, 2014
Study on the influence of rotating stall on the aerodynamic noise of axial fan has important value to warn of the occurrence of stall through monitoring the noise variations.
Lei Zhang, Rui Wang, Songling Wang
doaj   +1 more source

A Dual‐Bioresponsive and Programmable Microneedle Matrix as a Bioinspired Coupler for Orchestrating Diabetic Bone Regeneration

Advanced Materials, EarlyView.
This project developed a smart bandage‐like patch (a microneedle array) for repairing diabetic bone damage. It intelligently senses signals from infection and inflammation, then releases its medicines in a specific, timed sequence: first an antibacterial agent, then an anti‐inflammatory agent, and finally growth factors.
Yu Wang, Rui Chen, Yu Chen, Haowen Lu, Yuchen Qian, Zhiheng Gao, Zheming Shen, Xiaofei Zheng, Huilin Yang, Jun Zou, Yusen Qiao   +10 more
wiley   +1 more source

Bias‐Triggered Conductivity Relaxation (BCR): A Unique Tool to Simultaneously Investigate Thermodynamics, Kinetics, and Electrostatic Effects of Oxygen Reactions in MIEC Thin Films

Advanced Materials, EarlyView.
This work develops bias‐triggered conductivity relaxation as a novel technique to study oxygen reactions in mixed ionic‐electronic conducting thin films by integrating electrochemical titration and electrical conductivity relaxation to achieve synchronous multi‐parameter characterization, providing simultaneous electronic, ionic, and extraordinarily ...
Alexander Stangl, Alexander Schmid, Adeel Riaz, Jürgen Fleig, Arnaud Badel   +4 more
wiley   +1 more source

Characterization of dynamic stall of a wind turbine airfoil with a high Reynolds number [PDF]

Wind Energy Science
This study shows an extensive analysis of dynamic stall on wind turbine airfoils, preparing for the development of a reduced-order model applicable to thick airfoils (t/c>0.21) in the future.
H. R. Kim, J. A. Printezis, J. D. Ahrens, J. R. Seume, L. Wein   +4 more
doaj   +2 more sources