Centrifugal compressor surge and stall are an instabilities flow and system phenomenon, which can lead to a loss of engine power, large pressure transients and, in some cases, failure of the compressor and bearing system. Three-dimensional, compressible, unsteady Navier-Stokes equations are solved, using the sliding mesh at the interface between the moving and stationary parts. The investigated computational domain is composed of inlet pipe, inlet bell, impeller followed by a diffuser. The impeller side cavities are included in the computational domain, to make the simulation more close to the actual case. The present article focuses on the unsteady pressure and velocity results within the impeller and diffuser, at an operating condition close to the surge of the compressor. The computational data compares favorably with the measured data, from literature, for the same compressor and operational point. The pressure fluctuation results are analyzed for the surge and design operating conditions. Through the acquisition of both velocity and transient pressure data, the time evaluation of the unsteady flow during surge is revealed.
Skip Nav Destination
ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
June 16–20, 2014
Düsseldorf, Germany
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4563-9
PROCEEDINGS PAPER
Unsteady CFD Simulation for High Speed Centrifugal Compressor Operating Near Surge
Ibrahim Shahin,
Ibrahim Shahin
Qatar University, Doha, Qatar
Benha University, Egypt
Search for other works by this author on:
Mohamed Gadala,
Mohamed Gadala
University of British Columbia, Vancouver, BC, Canada
Search for other works by this author on:
Mohamed Alqaradawi,
Mohamed Alqaradawi
Qatar University, Doha, Qatar
Search for other works by this author on:
Osama Badr
Osama Badr
British University in Egypt, Alshorouk, Egypt
Search for other works by this author on:
Ibrahim Shahin
Qatar University, Doha, Qatar
Benha University, Egypt
Mohamed Gadala
University of British Columbia, Vancouver, BC, Canada
Mohamed Alqaradawi
Qatar University, Doha, Qatar
Osama Badr
British University in Egypt, Alshorouk, Egypt
Paper No:
GT2014-27336, V02DT44A045; 10 pages
Published Online:
September 18, 2014
Citation
Shahin, I, Gadala, M, Alqaradawi, M, & Badr, O. "Unsteady CFD Simulation for High Speed Centrifugal Compressor Operating Near Surge." Proceedings of the ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. Volume 2D: Turbomachinery. Düsseldorf, Germany. June 16–20, 2014. V02DT44A045. ASME. https://doi.org/10.1115/GT2014-27336
Download citation file:
83
Views
Related Proceedings Papers
Related Articles
Unsteady Flow in a Turbocharger Centrifugal Compressor: Three-Dimensional Computational Fluid Dynamics Simulation and Numerical and Experimental Analysis of Impeller Blade Vibration
J. Turbomach (July,2006)
Editorial
J. Fluids Eng (September,2001)
An Enhanced Greitzer Compressor Model Including Pipeline Dynamics and Surge
J. Vib. Acoust (October,2011)
Related Chapters
Dynamic Behavior of Pumping Systems
Pipeline Pumping and Compression Systems: A Practical Approach
Other Components and Variations
Axial-Flow Compressors
Pulsation and Vibration Analysis of Compression and Pumping Systems
Pipeline Pumping and Compression Systems: A Practical Approach, Second Edition