Three-dimensional steady and unsteady (pulsating) compressible flows in a vane-less turbocharger turbine of a 1.7 liter SI engine are simulated numerically, and the results are validated experimentally using a turbocharged on-engine test cell. Simulations are carried out for a 720° engine cycle at three engine speeds, and the complete forms of volute and rotor vanes are modeled. Two ways for modeling the rotating wheel, multiple reference frames (MRF), and sliding mesh (SM) techniques are also examined. Finally, the effects of pulsating flow on the turbocharger turbine performance parameters (TTPP) such as the inlet static pressure, reduced mass flow rate, and efficiency are obtained and compared with their values under steady flow. The results show that the accuracy of steady characteristic map to estimate the TTPPs has some source of ambiguity, which should be considered for detailed analysis. TTPP values under steady flow conditions are found to be significantly deviated from the unsteady results. These deviations are decreased as the engine speed increases.
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August 2012
Flows In Complex Systems
An Investigation on Turbocharger Turbine Performance Parameters Under Inlet Pulsating Flow
Tabatabaei Hamidreza,
Tabatabaei Hamidreza
Department of Mechanic and Aerospace Engineering,
e-mail: h.tabatabaei@iaukashan.ac.ir
Science and Research Branch, Islamic Azad University
, P.O. Box 14155-4933, Hesarak, Tehran, Iran
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Boroomand Masoud,
Boroomand Masoud
Department of Aerospace Engineering,
e-mail: boromand@aut.ac.ir
Amirkabir University of Technology
, Hafez Avenue, P.O. Box 15875-4413, Tehran, Iran
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Taeibi Rahni Mohammad
Taeibi Rahni Mohammad
Department of Aerospace Engineering,
Sharif University of Technology
, Azadi Avenue, P.O. Box 11365-11155, Tehran, Iran
Search for other works by this author on:
Tabatabaei Hamidreza
Department of Mechanic and Aerospace Engineering,
Science and Research Branch, Islamic Azad University
, P.O. Box 14155-4933, Hesarak, Tehran, Iran
e-mail: h.tabatabaei@iaukashan.ac.ir
Boroomand Masoud
Department of Aerospace Engineering,
Amirkabir University of Technology
, Hafez Avenue, P.O. Box 15875-4413, Tehran, Iran
e-mail: boromand@aut.ac.ir
Taeibi Rahni Mohammad
Department of Aerospace Engineering,
Sharif University of Technology
, Azadi Avenue, P.O. Box 11365-11155, Tehran, Iran
J. Fluids Eng. Aug 2012, 134(8): 081102 (8 pages)
Published Online: July 27, 2012
Article history
Received:
October 19, 2011
Revised:
June 4, 2012
Online:
July 27, 2012
Published:
July 27, 2012
Citation
Hamidreza, T., Masoud, B., and Mohammad, T. R. (July 27, 2012). "An Investigation on Turbocharger Turbine Performance Parameters Under Inlet Pulsating Flow." ASME. J. Fluids Eng. August 2012; 134(8): 081102. https://doi.org/10.1115/1.4006995
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