Results 31 to 40 of about 24,787 (347)

Simulating the aerodynamic performance and wake dynamics of a vertical-axis wind turbine [PDF]

, 2011
The accurate prediction of the aerodynamics and performance of vertical-axis wind turbines is essential if their design is to be improved but poses a signifi cant challenge to numerical simulation tools.
Brown, Richard, Fletcher, Timothy M., Scheurich, Frank   +2 more
core   +1 more source

Simulation of Entropy Generation under Stall Conditions in a Centrifugal Fan

Entropy, 2014
Rotating stalls are generally the first instability met in turbomachinery, before surges. This 3D phenomenon is characterized by one or more stalled flow cells which rotate at a fraction of the impeller speed. The goal of the present work is to shed some
Lei Zhang, Jinhua Lang, Kuan Jiang, Songling Wang   +3 more
doaj   +1 more source

Using Tip Injection to Stability Enhancement of a Transonic Centrifugal Impeller with Inlet Distortion [PDF]

Journal of Applied Fluid Mechanics, 2022
This paper aims to understand the effects of circumferential inlet distortion and tip injection on a transonic impeller performance and flow field. For distorted inflow, the impeller is subjected to a stationary 120-degrees circumferential total pressure
Z. Jahani, H. Khaleghi, S. Tabejamaat
doaj   +1 more source

A new stall-onset criterion for low speed dynamic-stall [PDF]

, 2005
The Beddoes/Leishman dynamic-stall model has become one of the most popular for the provision of unsteady aerofoil data embedded in much larger codes.
Beddoes, Beddoes, Beddoes, Beddoes, Carr, Carr, Daley, Ekaterinaris, F. N. Coton, Gangwani, Johnson, Jones, Leishman, Leishman, Niven, Niven, R. A. McD. Galbraith, Tran, W. Sheng, Wilby, Wilby   +20 more
core   +1 more source

Stall Inception and Development in an Axial Flow Aeroengine [PDF]

Journal of Turbomachinery, 1993
This paper describes the phenomenon of stall and surge in an axial flow aeroengine using fast response static pressure measurements from the compressor of a Rolls-Royce VIPER engine. It details the growth of flow instability at various speeds, from a small zone of stalled fluid involving only a few blades into the violent surge motion of the entire ...
Alexander G. Wilson, Chris Freeman
openaire   +1 more source

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

213 Numerical Simulation of Stall Inception in an Axial Compressor

The Proceedings of Conference of Tohoku Branch, 2008
Yusuke Kamei, Ken-ichi FUNAZAKI, Kazutoyo YAMADA   +2 more
openalex   +3 more sources

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

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