Simulation of a centrifugal compressor to obtain the characteristic map through computational effort

  • Gustavo Bonolo de Campos
  • Jesuíno Takachi Tomita
  • Cleverson Bringhenti
Technical Paper


The association of turbochargers with piston engines is widespread since both the efficiency and the power output of an engine could be improved. However, a piston engine operational range is wide and highly variable. This characteristic imposes challenges for the project and application of a turbocharger that should perform properly within the operational range. An important tool used to evaluate the performance of both turbine and compressor, which compose a turbocharger, is the characteristic map. The map condenses the main performance parameters into a single graphic that allow the evaluation of the machine characteristics, such as the operational width. A typical characteristic map relates the pressure ratio, mass flow rate, rotation and efficiency for each operational condition. The present work provides a technique to obtain the characteristic map of a turbocharger centrifugal compressor with reduced time consumption through steady state simulation using a fully unstructured mesh. Evaluation of the results indicated good accuracy for the predicted mass flow rate and pressure ratio. However, the resulting efficiency presented considerable discrepancy, which was aggravated when simulating extreme operational conditions or when the mass flow was used as a boundary condition. At last, the porter shroud and volute were evaluated within the entire range to provide an insight into the compressor operation.


Turbocharger Centrifugal compressor Characteristic map Computational fluid dynamics 



The authors would like to acknowledge Eduardo Borghetti from MasterPower who provided the experimental data that supported the research carried out at the Center for Reference on Gas Turbines of the Aeronautic Institute of Technology.


  1. 1.
    Sun H (2014) Steady state test demonstration of performance improvement with an advanced turbocharger. J Eng Gas Turbines Power 136:1–7. CrossRefGoogle Scholar
  2. 2.
    Chen H, Lei V (2012) Casing treatment and inlet swirl of centrifugal compressors. J Turbomach 135:1–8. Google Scholar
  3. 3.
    Semlitsch B et al (2014) Numerical flow analysis of a centrifugal compressor with ported and without ported shroud. In: SAE 2014 World Congress and Exhibition, Detroit (14PFL-0797).
  4. 4.
    Zheng X et al (2012) Stability improvement of high-pressure-ratio turbocharger centrifugal compressor by asymmetric flow control—part II: non-axisymmetric self-recirculation casing treatment. J Turbomach 135:1–8. CrossRefGoogle Scholar
  5. 5.
    Mojaddam M, Benisi AH, Movahhedy MR (2012) Investigation on effect of centrifugal compressor volute cross-section shape on performance and flow field. In: ASME Turbo Expo 2012, New York, vol 8, pp 871–880 (GT2020-69454).
  6. 6.
    Zheng XQ (2010) Influence of the volute on the flow in a centrifugal compressor of a high-pressure ratio turbocharger. J Power Energy 224:1157–1169. CrossRefGoogle Scholar
  7. 7.
    Campos GB (2016) Computational fluid mechanics strategy to determine the centrifugal compressor characteristic map. Master dissertation, Instituto Tecnológico de AeronáuticaGoogle Scholar
  8. 8.
    Mangani L, Casartelli E, Mauri S (2012) Assessment of various turbulence models in a high pressure ratio centrifugal compressor with an object oriented CFD code. J Turbomach 134:1–10. CrossRefGoogle Scholar
  9. 9.
    Sivagnanasundaram S, Spence S, Early J (2014) Map width enhancement technique for a turbocharger compressor. J Turbomach 136:1–10. Google Scholar
  10. 10.
    Samale A, Pacheco JE (2014) Volute CFD modeling evaluation for centrifugal compressors. In: ASME Turbo Expo 2014, Reston (GT2014-27274).
  11. 11.
    Sivagnanasundaram S et al (2012) Experimental and numerical analysis of a classical bleed slot system for a turbocharger compressor. In: 10th international conference on turbochargers, London, pp 325–341.
  12. 12.
    Niculescu ML et al (2007) Theoretical and numerical investigation of centrifugal and mixed compressors impellers. In: 8th international symposium on experimental and computational aerothermodynamics of internal flows, Lyon (ISAIF8-0012)Google Scholar
  13. 13.
    Menter FR (1994) Two-equation eddy-viscosity turbulence models for engineering applications. AIAA J 32:1598–1605. CrossRefGoogle Scholar
  14. 14.
    Bourgeois JA, Martinuzzi RJ, Savory E, Roberts DA (2011) Assessment of turbulence model predictions for an aero-engine centrifugal compressor. J Turbomach 133:1–15. CrossRefGoogle Scholar
  15. 15.
    Satish VVNK et al (2013) Accuracy of centrifugal compressors stages performance predictions by means of high fidelity CFD and validation using advanced aerodynamic probe. In: ASME Turbo Expo Reston (GT2013-95618).
  16. 16.
    Heinrich M, Schwarze R (2013) Simulation of the compressor stage of a turbocharger: validation of the Open Source Library OPENFOAM. In: Proceedings of the ASME Turbo Expo 2013, San Antonio, TX. ASME, Reston.

Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2018

Authors and Affiliations

  1. 1.Turbomachinery DepartmentAeronautics Institute of TechnologySão José dos CamposBrazil

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