Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Imprimir: 2152-5102
ISSN On-line: 2152-5110

Volumes:
Volume 46, 2019 Volume 45, 2018 Volume 44, 2017 Volume 43, 2016 Volume 42, 2015 Volume 41, 2014 Volume 40, 2013 Volume 39, 2012 Volume 38, 2011 Volume 37, 2010 Volume 36, 2009 Volume 35, 2008 Volume 34, 2007 Volume 33, 2006 Volume 32, 2005 Volume 31, 2004 Volume 30, 2003 Volume 29, 2002 Volume 28, 2001 Volume 27, 2000 Volume 26, 1999 Volume 25, 1998 Volume 24, 1997 Volume 23, 1996 Volume 22, 1995

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v35.i6.50
pages 570-780

Steady and Unsteady Flow Investigations on the Effect of Different Number of Diffuser Vanes

Ning He
SPMP, Shanghai Port Machinary LTD, Shanghai, P.R. China

RESUMO

This paper presents a computational analysis of a high-speed centrifugal compressor stage where emphasis is focused on both the steady and unsteady flow investigations and on the effect of different number of diffuser vanes on the stage operating range. The simulations were carried out for a centrifugal stage with a backswept impeller and several diffusers with 11, 22 and 33 vanes. For the steady simulations, an averaging approach was used at the interface between the impeller and the diffuser. For the unsteady simulations, geometry scaling was used to deal with the problem of unequal pitch. As the number of diffuser vanes was increased, the pressure recovery coefficient in the semi-vaneless space at surge condition was found to reduce. Also, as the number of diffuser vanes was increased, the flow distortion became more pronounced in the vaneless and semi-vaneless space. It is proposed that this more distorted flow is harmful to the pressure recovery in the semi-vaneless space giving stages with more diffuser vanes narrower flow ranges. It was also found that the diffuser area ratio is not the dominant factor influencing the flow range when the number of diffuser vanes changes.


Articles with similar content:

Steady and Unsteady Analysis of the Effects of Radial Gap Size in a Centrifugal Compressor Stage
International Journal of Fluid Mechanics Research, Vol.34, 2007, issue 1
Ning He
Experimental Study on a Prototype Centrifugal Pump with Open Impeller During Stopping Period
International Journal of Fluid Mechanics Research, Vol.43, 2016, issue 1
Bao-Ling Cui, Yi Li, Zu-Chao Zhu, Yu-Liang Zhang, Yi-Ni Sheng
System of Monitoring of Period of Hidden Transition of Compressor Station to Emergency State
Journal of Automation and Information Sciences, Vol.43, 2011, issue 11
Ulkar E. Sattarova, N.E. Rzaeva, Naila Fuad kyzy Musaeva, Telman Abbas ogly Aliev, G.A. Guluyev
EFFECTS OF MERIDIONAL SHAPE ON HYDRAULIC AND SUCTION PERFORMANCE OF A HIGH SPECIFIC SPEED CENTRIFUGAL PUMP
3rd Thermal and Fluids Engineering Conference (TFEC), Vol.6, 2018, issue
Hyeon-Seok Shim, Kwang-Yong Kim
ANALYSIS OF FLOW STRUCTURES IN SUPERSONIC PLANE MIXING LAYERS WITH POD METHOD
TSFP DIGITAL LIBRARY ONLINE, Vol.5, 2007, issue
Song Fu, Qin Yang