This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Axial Flow Turbine Concept for Conventional and e-Turbocharging
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 09, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Engine downsizing has established itself as one of the most successful strategies to reduce fuel consumption and pollutant emissions in the automotive field. To this regard, a major role is played by turbocharging, which allows an increase in engine power density, so reducing engine size and weight. However, the need for turbocharging imposes some issues to be solved. In the attempt of mitigating turbo lag and poor low-end torque, many solutions have been presented in the open literature so far, such as: low inertia turbine wheels and variable geometry turbines; or even more complex concepts such as twin turbo and electrically assisted turbochargers. None of them appears as definitive, though.
As a possible way of reducing turbine rotor inertia, and so the turbo lag, also the change of turbine layout has been investigated, and it revealed itself to be a viable option, leading to the use of mixed-flow turbines. Only recently, the use of axial-flow turbines, with the aim of reducing rotor inertia, has been proposed as well.
The current paper documents a case study involving the design of unconventional axial-flow turbocharger turbines for a 1.6-liter spark ignition light-duty automotive engine. The goal of the work is to improve engine transient performance, while ensuring the same level of boost pressure with respect to the baseline case, i.e. engine equipped with radial-flow turbine. To do so, two possible proposals are investigated: a “conventional” turbocharger concept, namely turbine and compressor mechanically coupled, which is compared with an advanced turbocharging concept, based on turbine and compressor electrically coupled. In both cases, a single-stage axial flow turbine is employed to extract energy from the exhaust gases. Ad hoc preliminary turbine design tools are developed, accounting for both design point and off-design performance. Turbocharger-engine matching is subsequently verified by means of a 1D engine model. Finally, results are used to derive guidelines for unconventional turbocharging turbine design.
CitationCappiello, A., Tuccillo, R., Cameretti, M., and Pesyridis, A., "Axial Flow Turbine Concept for Conventional and e-Turbocharging," SAE Technical Paper 2019-24-0185, 2019, https://doi.org/10.4271/2019-24-0185.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]|
|[Unnamed Dataset 3]|
|[Unnamed Dataset 4]|
|[Unnamed Dataset 5]|
- Kutlar, O., Arslan, H., and Calik, A. , “Methods to Improve Efficiency of Four Stroke, Spark Ignition Engines at Part Load,” Energy Conversion and Management 46(20):3202-3220, December 2005.
- Fraser, N., Blaxill, H., Lumsden, G., and Bassett, M. , “Challenges for Increased Efficiency through Gasoline Engine Downsizing,” SAE Int. J. Engines 2(1):991-1008, 2009, doi:10.4271/2009-01-1053.
- Shahed, S. and Bauer, K. , “Parametric Studies of the Impact of Turbocharging on Gasoline Engine Downsizing,” SAE Int. J. Engines 2(1):1347-1358, 2009, doi:10.4271/2009-01-1472.
- Assi, A., Chokor, B., Hammoud, M., Hallal, A. et al. , “Reducing the Turbo Lag of a Fixed Geometry Turbocharger,” IJISET - International Journal of Innovative Science, Engineering & Technology 4(1):235-243, January 2017.
- Tetsui, T. , “Application of TiAl in a Turbocharger for Passenger Vehicles,” Advanced Engineering Materials 3(5):307-310, May 2001.
- Feneley, A., Pesiridis, A., and Andwari, A. , “Variable Geometry Turbocharger Technologies for Exhaust Energy Recovery and Boosting-a Review,” Renewable and Sustainable Energy Reviews 71:959-975, May 2017.
- Zhang, Q., Lu, P., Dimitriou, P., Akehurst, S. et al. , “Implementing Full Electric Turbocharging Systems on Highly Boosted Gasoline Engines,” ASME. Turbo Expo: Power for Land, Sea, and Air, 2017.
- Rajoo, S. and Martinez-Botas, R. , “Mixed Flow Turbine Research: A Review,” ASME. J. Turbomach. 130(4):044001-044012, October 2008.
- Pischinger, S., Nijs, M., Adomeit, P., Seebach, D. et al. , “Trends-Spark Ignition,” . In: Encyclopedia of Automotive Engineering. (John Wiley & Sons, Ltd, 2014), 6-9.
- Lotterman J., Kares V., Jeckel D., and di Martino P. , “New Turbocharger Concept for Gasoline Engines,” MTZ Worldwide, 73, 6, 54-58, June 2012.
- Pesiridis, A., Ferrara, A., Tuccillo, R., and Chen, H. , “Conceptual Design of an Axial Turbocharger Turbine,” ASME. Turbo Expo: Power for Land, Sea, and Air, 2017.
- Pesiridis, A., Saccomanno, A., Tuccillo, R., and Capobianco, A. , “Conceptual Design of a Variable Geometry, Axial Flow Turbocharger Turbine,” SAE Technical Paper 2017-24-0163 , 2017, doi:10.4271/2017-24-0163.
- Pesyridis, A., Cappiello, A., and Tuccillo, R. , “Design of a Variable Geometry Axial-Inflow Turbine Turbocharger Equipped with a Diffuser-Collector System,” ASME. Turbo Expo: Power for Land, Sea, and Air, 2018.
- Weber, C., Brumley, A., Filipe, D., Whiston, P. et al. , “1.6 SCTI: The New EcoBoost DI-Turbo Engine with Central Direct Injection for Ford's Volume Carlines,” . In: Aachener Kolloquium Fahrzeug- und Motorentechnik. (Aachen, 2010).
- Ainley D.G. and Mathieson G.C.R. , “A Method of Performance Estimation for Axial Flow Turbines,” British ARC R&M 2974, 1951.
- Zweifel, O. , “The Spacing of Turbo-Machine Blading, Especially with Large Angular Deflection,” The Brown Boveri Review 32:436-444, December 1945.
- Kacker, S. and Okapuu, U. , “A Mean Line Prediction Method for Axial Flow Turbine Efficiency,” ASME. J. Eng. Power 104(1):111-119, 1982.
- Dunham, J. and Came, P. , “Improvements to the Ainley-Mathieson Method of Turbine Performance Prediction,” ASME. J. Eng. Power 92(3):252-256, 1970.
- Benner, M., Sjolander, S., and Moustapha, S. , “Influence of Leading-Edge Geometry on Profile Losses in Turbines at Off-Design Incidence: Experimental Results and an Improved Correlation,” ASME. J. Turbomach. 119(2):193-200, 1997.
- Moustapha, S., Kacker, S., and Tremblay, B. , “An Improved Incidence Losses Prediction Method for Turbine Airfoils,” ASME. J. Turbomach 112(2):267-276, 1990.
- Mikkelson D. , “15KW Small Turboelectric Power Generation System,” 2006.