Numerical simulation of flow inside a vaned diffuser of a modified centrifugal compressor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, the flow inside a small modified centrifugal compressor with a vaned diffuser used in an automotive turbocharger application was simulated. It has been known that the performance of the centrifugal compressor depends on the interaction between the compressor impeller and the vaned diffuser. The modified compressor comprises two splitters, which are not extended to the leading edge. If the splitters extend to the leading edge, it would produce a sufficient blockage to cause choking at high speed. This research aimed to study and simulate the effect of a vaned diffuser on the performance of a modified turbocharger compressor. The simulation was undertaken using CFD analysis to predict the aerodynamic flow field and characteristics. The mesh generator of a CFD code was used to generate a polyhedral mesh. Steady state analysis was carried out for the stage with the mixing plane approach. According to the results of the simulation, the vaned diffuser flow is characterized by a subsonic flow and there is no choking in between impellers exit and vane inlet. It was also observed that the outlet diffuser velocity is lower than outlet impeller velocity. At the outlet of the vaned diffuser, the total pressure was found to decrease, and the static pressure increase.

Original languageEnglish
Title of host publicationProceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012
PublisherAustralasian Fluid Mechanics Society
ISBN (Print)9780646583730
Publication statusPublished - 2012
Event18th Australasian Fluid Mechanics Conference, AFMC 2012 - Launceston, Australia
Duration: 3 Dec 20127 Dec 2012

Other

Other18th Australasian Fluid Mechanics Conference, AFMC 2012
CountryAustralia
CityLaunceston
Period3/12/127/12/12

Fingerprint

Centrifugal compressors
Compressors
Computer simulation
Computational fluid dynamics
Subsonic flow
Gas generators
Impellers
Flow fields
Aerodynamics

Keywords

  • Centrifugal compressor
  • CFD
  • Flow characteristics
  • Numerical simulation
  • Vaned diffuser

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Jawad, L. H., Abdullah, S., Zulkifli, R., & Wan Mahmood, W. M. F. (2012). Numerical simulation of flow inside a vaned diffuser of a modified centrifugal compressor. In Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012 Australasian Fluid Mechanics Society.

Numerical simulation of flow inside a vaned diffuser of a modified centrifugal compressor. / Jawad, Layth H.; Abdullah, Shahrir; Zulkifli, Rozli; Wan Mahmood, Wan Mohd Faizal.

Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012. Australasian Fluid Mechanics Society, 2012.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Jawad, LH, Abdullah, S, Zulkifli, R & Wan Mahmood, WMF 2012, Numerical simulation of flow inside a vaned diffuser of a modified centrifugal compressor. in Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012. Australasian Fluid Mechanics Society, 18th Australasian Fluid Mechanics Conference, AFMC 2012, Launceston, Australia, 3/12/12.
Jawad LH, Abdullah S, Zulkifli R, Wan Mahmood WMF. Numerical simulation of flow inside a vaned diffuser of a modified centrifugal compressor. In Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012. Australasian Fluid Mechanics Society. 2012
Jawad, Layth H. ; Abdullah, Shahrir ; Zulkifli, Rozli ; Wan Mahmood, Wan Mohd Faizal. / Numerical simulation of flow inside a vaned diffuser of a modified centrifugal compressor. Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012. Australasian Fluid Mechanics Society, 2012.
@inproceedings{6a257fb72c37448eb4d45765cd3c9c9c,
title = "Numerical simulation of flow inside a vaned diffuser of a modified centrifugal compressor",
abstract = "In this paper, the flow inside a small modified centrifugal compressor with a vaned diffuser used in an automotive turbocharger application was simulated. It has been known that the performance of the centrifugal compressor depends on the interaction between the compressor impeller and the vaned diffuser. The modified compressor comprises two splitters, which are not extended to the leading edge. If the splitters extend to the leading edge, it would produce a sufficient blockage to cause choking at high speed. This research aimed to study and simulate the effect of a vaned diffuser on the performance of a modified turbocharger compressor. The simulation was undertaken using CFD analysis to predict the aerodynamic flow field and characteristics. The mesh generator of a CFD code was used to generate a polyhedral mesh. Steady state analysis was carried out for the stage with the mixing plane approach. According to the results of the simulation, the vaned diffuser flow is characterized by a subsonic flow and there is no choking in between impellers exit and vane inlet. It was also observed that the outlet diffuser velocity is lower than outlet impeller velocity. At the outlet of the vaned diffuser, the total pressure was found to decrease, and the static pressure increase.",
keywords = "Centrifugal compressor, CFD, Flow characteristics, Numerical simulation, Vaned diffuser",
author = "Jawad, {Layth H.} and Shahrir Abdullah and Rozli Zulkifli and {Wan Mahmood}, {Wan Mohd Faizal}",
year = "2012",
language = "English",
isbn = "9780646583730",
booktitle = "Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012",
publisher = "Australasian Fluid Mechanics Society",

}

TY - GEN

T1 - Numerical simulation of flow inside a vaned diffuser of a modified centrifugal compressor

AU - Jawad, Layth H.

AU - Abdullah, Shahrir

AU - Zulkifli, Rozli

AU - Wan Mahmood, Wan Mohd Faizal

PY - 2012

Y1 - 2012

N2 - In this paper, the flow inside a small modified centrifugal compressor with a vaned diffuser used in an automotive turbocharger application was simulated. It has been known that the performance of the centrifugal compressor depends on the interaction between the compressor impeller and the vaned diffuser. The modified compressor comprises two splitters, which are not extended to the leading edge. If the splitters extend to the leading edge, it would produce a sufficient blockage to cause choking at high speed. This research aimed to study and simulate the effect of a vaned diffuser on the performance of a modified turbocharger compressor. The simulation was undertaken using CFD analysis to predict the aerodynamic flow field and characteristics. The mesh generator of a CFD code was used to generate a polyhedral mesh. Steady state analysis was carried out for the stage with the mixing plane approach. According to the results of the simulation, the vaned diffuser flow is characterized by a subsonic flow and there is no choking in between impellers exit and vane inlet. It was also observed that the outlet diffuser velocity is lower than outlet impeller velocity. At the outlet of the vaned diffuser, the total pressure was found to decrease, and the static pressure increase.

AB - In this paper, the flow inside a small modified centrifugal compressor with a vaned diffuser used in an automotive turbocharger application was simulated. It has been known that the performance of the centrifugal compressor depends on the interaction between the compressor impeller and the vaned diffuser. The modified compressor comprises two splitters, which are not extended to the leading edge. If the splitters extend to the leading edge, it would produce a sufficient blockage to cause choking at high speed. This research aimed to study and simulate the effect of a vaned diffuser on the performance of a modified turbocharger compressor. The simulation was undertaken using CFD analysis to predict the aerodynamic flow field and characteristics. The mesh generator of a CFD code was used to generate a polyhedral mesh. Steady state analysis was carried out for the stage with the mixing plane approach. According to the results of the simulation, the vaned diffuser flow is characterized by a subsonic flow and there is no choking in between impellers exit and vane inlet. It was also observed that the outlet diffuser velocity is lower than outlet impeller velocity. At the outlet of the vaned diffuser, the total pressure was found to decrease, and the static pressure increase.

KW - Centrifugal compressor

KW - CFD

KW - Flow characteristics

KW - Numerical simulation

KW - Vaned diffuser

UR - http://www.scopus.com/inward/record.url?scp=84959036960&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84959036960&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84959036960

SN - 9780646583730

BT - Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012

PB - Australasian Fluid Mechanics Society

ER -