Results 31 to 40 of about 24,380 (286)

Experimental Investigation of Rotating Instability in an Axial Compressor with a Steady Swirl Distortion Inlet

Energies, 2021
In this paper, an experimental study was carried out on the rotating instability in an axial compressor subjected to inlet steady paired swirl distortion.
Rong Xu, Jun Hu, Xuegao Wang, Chao Jiang, Jiajia Ji   +4 more
doaj   +1 more source

Control of rotorcraft retreating blade stall using air-jet vortex generators [PDF]

, 2006
A series of low-speed wind tunnel tests were carried out on an oscillating airfoil fitted with two rows of air-jet vortex generators (AJVGs). The airfoil used had an RAE 9645 section and the two spanwise arrays of AJVGs were located at x/c=0.12 and 0.62.
Akanni S. D., Alferai M., Anastasios Kokkalis, Bousman W. G., Carr L. W., Chan W., Chrisminder Singh, Coton F. N., David J. Peake, Frank N. Coton, Green R. B., Johnson W., Lewington N. P., McCloud J. L., III, McCroskey W. J., Robinson M. C., Roderick A. McD. Galbraith, Singh C., Teves D., Vahik Khodagolian, Weaver D., Wilby P. G., Wilby P. G.   +22 more
core   +1 more source

Early surge detection on a turbocharger used to pressurize a SOFC plant emulator [PDF]

E3S Web of Conferences, 2023
High-speed centrifugal compressors are commonly exploited to pressurize fuel cell-based hybrid energy systems. In such complex plants, because of significant interposed volumes due to fuel cells, dynamic compressor response can induce severe vibrations ...
Niccolini Marmont Du Haut Champ Carlo Alberto, Silvestri Paolo, Reggio Federico, Ferrari Mario Luigi, Massardo Aristide Fausto   +4 more
doaj   +1 more source

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

Numerical Study on the Acoustic Characteristics of an Axial Fan under Rotating Stall Condition

Energies, 2017
Axial fan is an important piece of equipment in the thermal power plant that provides enough air for combustion of coal. This paper focuses on the aerodynamic noise characteristics of an axial fan in the development from stall inception to stall cells ...
Lei Zhang, Chuang Yan, Ruiyang He, Kang Li, Qian Zhang   +4 more
doaj   +1 more source

Experimental Examination of an Axial Compressor as a Basis for an Active Stall Avoidance System

International Journal of Rotating Machinery, 2000
A single-stage subsonic compressor was examined with respect to compressor instabilities. During the inception of rotating stall, the transients of the pressure rise and mass flow were measured as well as their hysteresis.
Richard Schulze, Dietmar K. Hennecke, Thuyen Le, Manfred Glesner   +3 more
doaj   +1 more source

Unsteady Full Annulus Simulations of a Transonic Axial Compressor Stage [PDF]

Two recent research endeavors in turbomachinery at NASA Glenn Research Center have focused on compression system stall inception and compression system aerothermodynamic performance.
Chen J.-P., Chen J.-P., Hathaway M.D., Kirtley K.R.   +3 more
core   +2 more sources

Simulation of entropy generation during the evolution of rotating stall in a two-stage variable-pitch axial fan

Advances in Mechanical Engineering, 2019
Rotating stall is a common instability phenomenon that occurs in turbomachinery. Rotating stall 3D instability can be characterized as one or more stall cells rotating at a fraction of rotor velocity.
Lei Zhang, Zhi Zheng, Qian Zhang, Songling Wang   +3 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

Engineering Fluoroacetate Dehalogenase by Growth‐Based Selections on Non‐Natural Organofluorides

Angewandte Chemie, EarlyView.
We present a high‐throughput selection system to engineer fluoroacetate dehalogenases (FAcDs). By challenging E. coli populations that produce diverse FAcD libraries to grow on non‐natural organofluorides as their sole carbon source, we isolated a panel of FAcD variants with improved activity and altered substrate specificity.
Suzanne C. Jansen, Pauline van Beers, Clemens Mayer   +2 more
wiley   +2 more sources