American Journal of Energy Research
ISSN (Print): 2328-7349 ISSN (Online): 2328-7330 Website: Editor-in-chief: Apply for this position
Open Access
Journal Browser
American Journal of Energy Research. 2017, 5(3), 97-102
DOI: 10.12691/ajer-5-3-4
Open AccessArticle

Grid Dependency Analysis for Performance Prediction of an Automotive Mixed Flow Turbine

Ahmed Ketata1, and Zied Driss1,

1Laboratory of Electro-Mechanic Systems (LASEM), National School of Engineers of Sfax (ENIS), University of Sfax (US), B.P. 1173, Road Soukra km 3.5, 3038 Sfax, TUNISIA

Pub. Date: November 20, 2017

Cite this paper:
Ahmed Ketata and Zied Driss. Grid Dependency Analysis for Performance Prediction of an Automotive Mixed Flow Turbine. American Journal of Energy Research. 2017; 5(3):97-102. doi: 10.12691/ajer-5-3-4


The turbocharger which consists essentially on a radial turbine and a centrifugal compressor is commonly embedded to internal combustion engines in order to enhance its performance. The use of a mixed flow turbine instead of a radial one leads to better aerodynamic efficiency. The present investigation shows our optimized numerical model under steady conditions in purpose to predict the overall performance for an automotive vanned mixed flow turbine. Using the CFX 17.0 package, numerical results are obtained by solving the Reynolds averaged Navier Stokes equations by means of a finite volume discretization method. The standard k-ε turbulence model is used to close these equations. Based on the numerical solutions, the turbine performance and the reaction degree are computed. Equally, the distribution of the turbine output torque and its blades loading as a function of the isentropic velocity ratio are plotted. The mesh choice is based on the solution independency. Our numerical results show a good agreement compared to the test data.

turbocharger mixed flow turbine performance mass flow Efficiency CFD turbulence

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit


[1]  M. Abidat, Design and testing of a highly loaded mixed flow turbine. PhD thesis, Imperial College, London, 1991.
[2]  S. M. Futral, C. A. Wasserbauer, Off design performance prediction with experimental verification for a radial-inflow turbine, NASA TND-2621 (1965).
[3]  A. J. Glassmann, C. A. Wasserbauer, Fortran program for predicting off-design performance of radial inflow turbines, NASA TN-D-8063 (1975).
[4]  P. L. Meitner, A. J. Glassman, Computer code for off-design performance analysis of radial inflow turbines with rotor blade sweep, DTIC Document (1983).
[5]  N. Lymberopoulos, N. C. Baines, N. Watson, Flow in single and twin entry radial turbine volutes, ASME Gas Turbine and Aeroengine Congress paper 88-GT-59 (1988).
[6]  M. Hamel, M. Abidat, S.A. Litim, Investigation of the mixed flow turbine performance under inlet pulsating flow conditions, C. R. Mecanique 340 (2012) 165-176.
[7]  M. H. Padzillah, Experimental and numerical investigation of an automotive mixed flow turbocharger turbine under pulsating flow conditions. PhD thesis, Imperial College, London, 2014.
[8]  H. Roclawski, M. Gugau, F. Langecker, M. Böhle, Influence of degree of reaction on turbine performance for pulsating flow conditions, Proceedings of the ASME Turbo Expo (2014).
[9]  D. Palfreyman, and R. Martinez-Botas, Numerical study of the internal flow field characteristics in mixed flow turbines, Proc of ASME Turbo Expo GT2002-30372 (2002).
[10]  S. Rajoo, Steady and pulsating performance of a variable geometry mixed flow turbochager turbine, PhD thesis, Imperial College, London, 2007.
[11]  S. Driss, Z. Driss, I. Kallel-Kammoun, Computational study and experimental validation of the heat ventilation in a living room with a solar patio system, Energy and Buildings 28 (2016) 40-119.
[12]  Z. Driss, O. Mlayeh, S. Driss, D. Driss, M. Maaloul, M.S. Abid, Study of the incidence angle effect on the aerodynamic structure characteristics of an incurved Savonius wind rotor placed in a wind tunnel, Energy 894 (2016) 908-113.
[13]  Z. Driss, O. Mlayeh, D. Driss, M. Maaloul, M.S. Abid, Numerical simulation and experimental validation of the turbulent flow around a small incurved Savonius wind rotor, Energy 74 (2014) 506-17.
[14]  J.W. Lam, Q. Roberts, G. McDonnel, Flow modelling of a turbocharger turbine under pulsating flow, Preceedings of IMechE International Conference on Turbochargers and Turbocharging (2002) 181-197.
[15]  A. Romagnoli, R.F. Martinez-Botas, Performance prediction of a nozzled and nozzleless mixed-flow turbine in steady conditions, International Journal of Mechanical Science 53 (2011) 557-574.