This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Physical Model of a Twin-scroll Turbine with Unsteady Flow
Technical Paper
2015-01-1718
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The paper describes a way to a 1-D central streamline model of a radial turbine flow, suitable for twin-scroll description and based on approximation of real physics of flow mixing and energy transformation. The original 1-D model of a single scroll turbine, described earlier in numerous SAE papers, has been amended by twin-scroll nozzles (both vaneless or with blade cascades) and mixing of individual partitions of flows upstream of additional vaneless nozzle and an impeller. This model is transferable to 1-D unsteady simulations as it is (i.e., using quasi-steady approach) or using 1-D unsteady solvers. It has suitable features even for more detailed description of turbine flows and energy transformation. The first results of pulse influence on turbine maps delivered expected results consisting of complicated interaction between individual losses.
The model itself is not fully predictive, using experimentally or in CFD found loss coefficients, but it is suitable for extrapolation of experience from similar systems before detailed CFD simulation or experiments are done. The new model can be used especially transferring turbine features found during mapping back to the design stage at a turbocharger manufacturer.
The features of twin scroll turbines call for appropriate optimization of turbines for high pulsation factor, as they are currently used for twin-scroll four cylinder engine turbochargers (two cylinders with 360° distance between pulses). The results of turbine matching should be used as a feed-back for turbine design.
Recommended Content
Authors
Topic
Citation
Macek, J., Zak, Z., and Vitek, O., "Physical Model of a Twin-scroll Turbine with Unsteady Flow," SAE Technical Paper 2015-01-1718, 2015, https://doi.org/10.4271/2015-01-1718.Also In
References
- Zinner , K. Supercharging of Internal Combustion Engines Springer Heidelberg 1978
- Shapiro , A. H. The Dynamics and Thermodynamics of Compressible Fluid Flow The Ronald Press Comp. New York 1953
- Jenny , E. Berechnungen und Modellversuche über Druckwellen grosser Amplituden in Auspuff-Leitungen Dissertation ETH Zürich, Ameba Druck Basel 1949
- Watson , N. , Janota , M.S. Turbocharging the Internal Combustion Engine MacMillan Publishers London 1982 0 333 24290 4
- Sherstjuk , A. N. , Zarjankin A. E. Radial-Axial Turbines of a Small Power Mashinostroenije, Moscow 1976
- Dibelius G. Partial Admission of Turbocharger Turbines (in German) Brown Boveri Mitteilungen 52 1965 3
- Bulaty T. Specific Problems of 1-D Models of Gas Exchange at Turbocharged Engines (in German) Motortechnische Zeitschrift 35 1976 4
- Winterbone , D.E. et al. A Contribution to the Understanding of Turbocharger Turbine Performance in Pulsating Flow Int. Conf. on Internal Engine Research, Paper C433/011 Instn.Mech.Engrs. London 1991
- Hu , X. and Lawless , P. Predictions of On-Engine Efficiency for the Radial Turbine of a Pulse Turbocharged Engine SAE Technical Paper 2001-01-1238 2001 10.4271/2001-01-1238
- Luján , J. , Galindo , J. , and Serrano , J. Efficiency Characterization of Centripetal Turbines under Pulsating Flow Conditions SAE Technical Paper 2001-01-0272 2001 10.4271/2001-01-0272
- Dunham , J. , Came , P. Improvements to the Ainley-Mathieson Method of Turbine Performance Prediction Trans. ASME, Series A 92 1970
- Capobianco , M. , Marelli , S. Turbocharger Turbine Performance Under Steady and Unsteady Flow: Test Bed Analysis and Correlation Criteria 8 th Intnl. Conf. on Turbochargers and Turbocharging IMechE London 2006
- Capobianco , M. , Marelli , S. Unsteady Flow Behaviour of the Turbocharging Circuit in Downsized Automotive Engines FISITA Congress 2006 Yokohama
- Capobianco , M. and Marelli , S. Transient Performance of Automotive Turbochargers: Test Facility and Preliminary Experimental Analysis SAE Technical Paper 2005-24-066 2005 10.4271/2005-24-066
- Capobianco , M. , Gambarotta , A. Variable Geometry and Waste-Gated Automotive Turbochargers: Measurements and Comparison of Turbine Performance Journal of Engineering for gas Turbines and Power 114 1992 553 560
- Gurney , D. The Design of Turbocharged Engines Using 1D Simulation SAE Technical Paper 2001-01-0576 2001 10.4271/2001-01-0576
- Winkler , N. , Ångström , H. , and Olofsson , U. Instantaneous On-Engine Twin-Entry Turbine Efficiency Calculations on a Diesel Engine SAE Technical Paper 2005-01-3887 2005 10.4271/2005-01-3887
- Rehnberg , U. , Ångström , H. , and Olofsson , U. Instantaneous On-Engine Turbine Efficiency for an SI Engine in the Closed Waste Gate Region for 2 Different Turbochargers SAE Technical Paper 2006-01-3389 2006 10.4271/2006-01-3389
- Westin , F. and Ångström , H. Calculation Accuracy of Pulsating Flow through the Turbine of SI-Engine Turbochargers - Part 1 Calculations for Choice of Turbines with Different Flow Characteristics SAE Technical Paper 2005-01-0222 2005 10.4271/2005-01-0222
- Osako , K. , Higashimori , H. , and Mikogami , T. Study on the Internal Flow of Radial Turbine Rotating Blades for Automotive Turbochargers SAE Technical Paper 2002-01-0856 2002 10.4271/2002-01-0856
- Costall , A. , Szymko , S. , Martinez-Botas , R.F. , Filsinger , D. , Ninkovic , D. Assessment of Unsteady Behaviour in Turbocharger Turbines Proceedings of ASME TurboExpo 2006, pap. GT2006-90348 Barcelona 2006
- Serrano , J. , Arnau , F. , Novella , R. , and Reyes-Belmonte , M. A Procedure to Achieve 1D Predictive Modeling of Turbochargers under Hot and Pulsating Flow Conditions at the Turbine Inlet SAE Technical Paper 2014-01-1080 2014 10.4271/2014-01-1080
- Macek , J. , Vávra , J. , and Vítek , O. 1-D Model of Radial Turbocharger Turbine Calibrated by Experiments SAE Technical Paper 2002-01-0377 2002 10.4271/2002-01-0377
- Macek , J. , Vitek , O. , and Zak , Z. Calibration and Results of a Radial Turbine 1-D Model with Distributed Parameters SAE Technical Paper 2011-01-1146 2011 10.4271/2011-01-1146
- Macek , J. , Vítek , O. , Burič , J. , and Doleček , V. Comparison of Lumped and Unsteady 1-D Models for Simulation of a Radial Turbine SAE Int. J. Engines 2 1 173 188 2009 10.4271/2009-01-0303
- Macek , J. and Vítek , O. Simulation of Pulsating Flow Unsteady Operation of a Turbocharger Radial Turbine SAE Technical Paper 2008-01-0295 2008 10.4271/2008-01-0295
- Vávra , J. , Macek , J. , Vítek , O. , and Takáts , M. Investigation of Radial Turbocharger Turbine Characteristics under Real Conditions SAE Technical Paper 2009-01-0311 2009 10.4271/2009-01-0311
- GT-POWER, USER'S MANUAL and Tutorial GT-Suite™ version7.4 Private Publication Gamma Technologies Inc. Westmont IL 2013
- Morel , T. , Keribar , R. , and Leonard , A. Virtual Engine/Powertrain/Vehicle” Simulation Tool Solves Complex Interacting System Issues SAE Technical Paper 2003-01-0372 2003 10.4271/2003-01-0372
- Bogomolov , S. , Mikulec , A. , and Macek , J. Development of Design Assistance System and Its Application for Engine Concept Modeling SAE Technical Paper 2011-37-0030 2011 10.4271/2011-37-0030
- Vítek , O. , Macek , J. , and Polášek , M. New Approach to Turbocharger Optimization using 1-D Simulation Tools SAE Technical Paper 2006-01-0438 2006 10.4271/2006-01-0438
- Pohorelsky , L. , Zak , Z. , Macek , J. , and Vitek , O. Study of Pressure Wave Supercharger Potential using a 1-D and a 0-D Approach SAE Int. J. Engines 4 1 1331 1353 2011 10.4271/2011-01-1143
- Brynych , P. , Macek , J. , Vitek , O. , and Cervenka , L. 1-D Model of Roots Type Supercharger SAE Technical Paper 2013-01-0927 2013 10.4271/2013-01-0927
- Brinkert N. , Sumser S. , Schulz A. , Weber S. , Fieweger K and Bauer H.-J. Understanding the twin-scroll turbine-flow similarity ASME Turbo Expo 49 2207 2218 2011
- De Bellis , V. , Bozza , F. , Schernus , C. , and Uhlmann , T. Advanced Numerical and Experimental Techniques for the Extension of a Turbine Mapping SAE Int. J. Engines 6 3 1771 1785 2013 10.4271/2013-24-0119
- Fredriksson C. F. , Qiu Xuwen , Baines N. C. , Müller M. , Brinkert N. and Gutmann C. Meanline Modeling of Radial Inflow Turbine With Twin-Entry Scroll ASME Turbo Expo 2012 10.1115/GT2012-69018
- Aymanns R. ; Scharf J. ; Uhlmann T. ; Pischinger S. Turbocharger Efficiencies in Pulsating Exhaust Gas Flow MTZ 07-08 2012
- Lückmann D. ; Uhlmann T. ; Kindl H. ; Pischinger S. Separation in Double Entry Turbine Housings at Boosted Gasoline Engines MTZ 10 2013
- Uhlmann , T. et al. Development and Matching of Double Entry Turbines for the Next Generation of Highly Boosted Gasoline Engines 34th International Vienna Motor Symposium 2013
- Mikula , M. Modelling and Optimization of Pulse Converters for Highly Turbocharged Medium Speed Engines (in Czech) PhD Thesis Czech Technical University 1985
- Macek , J. , Mikula , M. Optimization of Exhaust Systems for Turbocharged Diesel Engines (in Czech) Technical Contributions of CKD PRAHA Heavy Industries 18 1985 11 28 0322-8523