Title: Numerical investigation of diffuser solidity effect on turbulent airflow and performance of the turbocharger compressor
Authors: Chehhat, Abdelmadjid
Si-Ameur, Mohamed
Boumeddane, Boussad
Abo-Serie, Essam
Boulahrouz, Salim
Citation: Applied and Computational Mechanics. 2016, vol. 10, no. 2, p. 79-96.
Issue Date: 2016
Publisher: University of West Bohemia
Document type: článek
URI: http://www.kme.zcu.cz/acm/acm/article/view/318/374
ISSN: 1802-680X (Print)
2336-1182 (Online)
Keywords: CFD analýza;pevnost difúzeru;rychlonabíječka;turbulentní proudění;lopatkový difúzer
Keywords in different language: CFD analysis;solidity diffuser;turbocharger;turbulent flow;vaned diffuser
Abstract: Low solidity diffuser in centrifugal compressors can achieve both high efficiency and wide operating ranges which is of great importance for turbocharger compressor. Low solidity is achieved by using a low chord to pitch ratio. In this work, a CFD simulation is carried out to examine the effect of solidity on airflow field of a turbocharger centrifugal compressor which consists of a simple-splitter impeller and a vaned diffuser. By changing the number of diffuser vanes while keeping the number of impeller blades constant, the solidity value of the diffuser is varied. The characteristics of the compressor are evaluated for 6, 8, 10 and 12 stator vanes which correspond to solidity of: 0.78, 1.04, 1.29 and 1.55, respectively. The spatial distribution of the pressure, velocity and turbulent kinetic energy show that the diffuser solidity has significant effect on flow field and compressor performance map. The compressor with a 6 vanes diffuser has higher efficiency and operates at a wider range of flow rate relative to that obtainedwith larger vans number.However a non-uniform flow at the compressor exit was observedwith relatively high turbulent kinetic energy.
Rights: © 2016 University of West Bohemia. All rights reserved.
Appears in Collections:Volume 10, number 2 (2016)
Volume 10, number 2 (2016)

Files in This Item:
File Description SizeFormat 
Chehhat.pdfPlný text7,05 MBAdobe PDFView/Open

Please use this identifier to cite or link to this item: http://hdl.handle.net/11025/22411

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.