• M. S. Chiong M. S. Chiong Transportation Research Alliance, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • S. Rajoo S. Rajoo Transportation Research Alliance, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia
  • R. F. Martinez-Botas R. F. Martinez-Botas Dept of Mechanical Engineering, Imperial College London, London SW7 2BX, UK
  • A. W. Costall A. W. Costall Caterpillar Inc., Energy and Power Systems Research, Peterborough PE1 5NA, UK


Inlet boundary conditions, one-dimensional modelling, turbine, unsteady


This paper presents the appropriate inlet boundary condition settings for turbocharger turbine unsteady performance prediction using one-dimensional modelling without the full access to pulsating engine exhaust flow parameter. Three different settings of inlet boundary conditions are discussed in this paper, each requiring different level of experimental result inputs. Two basic flow parameters, instantaneous static pressure and average static temperature of exhaust flow are the fundamental inputs for all inlet boundary condition settings presented. In general, all boundary conditions showed acceptable unsteady turbine non-dimensional parameter prediction, particularly the hysteresis of unsteady turbine swallowing capacity performance. Despite, the presence of steady state turbine performance map was found to further enhance the quality of dimensional flow parameters prediction. The strength and weakness of each boundary condition setting in flow performance prediction are analyzed and discussed. Finally, a boundary condition that included the steady state inlet flow Mach number gave the most compromise results in terms of unsteady non-dimensional and dimensional parameters prediction.


Abidat, M., Hachemi, M., Hamidou, M.K., Baines, N.C., 1998. Prediction of the steady and non-steady flow performance of a highly loaded mixed flow turbine, Proceedings of the Institution of Mechanical Engineers; 212 (3), 173--184.

Ghassemi, S., Shirani, E. and Hajilouy-Benisi, A., 2005. Performance Prediction of Twin-Entry Turbocharger Turbines, Iranian Journal of Science and Technology, Transaction B, Engineering, 29 (B2), 145--155.

Romagnoli, A. and Martinez-Botas, R. F., 2011. Performance prediction of a nozzled and nozzleless mixed flow turbine in steady conditions, International Journal of Mechanical Sciences, 53, 557--574.

Serrano, J.R., Arnau, F.J., Dolz, V., Tiseira, A., Cervelló, C., 2008. A model of turbocharger radial turbines appropriate to be used in zero- and one-dimensional gas dynamic codes for internal combustion engines modeling, Energy Conversion and Management, 49 (12), 3729--3745.

Costall, A.W., McDavid, R.M., Martinez-Botas, R.F., and Baines, N.C., 2011. Pulse performance modeling of a twin entry turbocharger turbine under full and unequal admission, Journal of Turbomachinery, 133(2), 1005-1--9.

British Standards. BS EN ISO 5167-1:1997: Measurement of fluid flow by means of pressure differential devices, Part 1, 1997.

Szymko, S., Martinez-Botas, R.F. and Pullen, K.R., 2005. Experimental evaluation of turbocharger turbine performance under pulsating flow conditions, Proceedings of the ASME Turbo Expo 2005: Power for Land, Sea and Air, Paper no. GT 2005-68878.

Nyquist Rate. Last accessed 24.11.11; URL:

RDP Electronics, 2001. Fast response from pressure transducer, CIP-Ultra pressure transducer. Last accessed 24.11.11; URL: and-vibration-testing/vision-and-colour-systems/fast-response-from pressuretransducer/72755.article.

Sarnes, B., and Schrüfer, E., 2007. Determination of the time behavior of thermocouples for sensor speedup and medium supervision, Proc. Estonian Acad. Sci. Eng., 13 (4), 295--309.

Sieverding, C. H., Arts,T., Denos,R. and Brouckaert, J.-F., 2000. Measurement techniques for unsteady flows in turbomachines, Experiments in Fluid, 28 (4), 285-321.

Manuel, A. A. M. and Viviana, S. F., 2010. Gas mass-flow meters: Principles and applications, Flow Measurement and Instrumentation, 21 (2), 143--149.

Syzmko, S., Martinez-Botas, R.F., Pullen, K.R., McGlashan, N.R. and Chen, H., 2002. A High-Speed Permanent Magnet Eddy-Current Dynamometer for Turbocharger Research, Proceedings. of IMechE 7th International Conference on turbochargers and turbocharging, C602/026/2002, 213--224.

Chiong M.S., Rajoo, S., Romagnoli, A. and Martinez-Botas, R. F., 2011. Single entry mixed flow turbine performance prediction with 1-D gas dynamic code coupled with mean line model, 10th International Gas Turbine Congress, IGTC2011-0158.




How to Cite

M. S. Chiong, M. S. C., S. Rajoo, S. R., R. F. Martinez-Botas, R. F. M.-B., & A. W. Costall, A. W. C. (2018). INLET BOUNDARY CONDITION STUDY FOR UNSTEADY TURBINE PERFORMANCE PREDICTION USING 1-D MODELING. Jurnal Mekanikal, 33(2). Retrieved from