This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental and Numerical Investigation of a Turbocharger Turbine Using Exergy Analysis at Non-Adiabatic Conditions
Technical Paper
2020-01-2225
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Heat transfer in a turbocharger plays a crucial role in the optimization of turbocharger-engine matching process. Due to high temperature gradients between the hot exhaust gas compared to the compressor as well as the environment, it is well-known, that the heat loss from a turbocharger turbine is significant. Investigations of turbocharger performance are commonly done by quantifying the performance parameters under adiabatic conditions, following the paradigm of the first law of thermodynamics, based on the energy balance method. It turns out that an adiabatic assumption and the energy balance method is insufficient to provide a deep understanding about the aerothermodynamic effects on the turbine performance due to heat transfer. Based on the current state-of-the-art, this study aims to improve the characterization methods for passenger car turbocharger turbines, considering the impacts of heat transfer. Firstly, the turbocharger is measured on a hot gas test bench. Based on this experimental data, the turbine heat transfer is being quantified through implementing a new innovative power-based approach. Consequently, a heat loss free turbine performance map can be derived. Secondly, a CFD analysis is performed on selected operating points, taking turbine housing temperature measurements as boundary conditions. CFD results are verified and validated by using the experimental data, both at adiabatic and diabatic test conditions. Finally, a flow exergy-based method is being applied to the predicted 3D flow field from the CFD simulation. This approach allows to identify and quantify the aerothermodynamic impacts of heat transfer on the turbine performance for cases with and without heat loss, considering both first and second laws of thermodynamics. This study aims to enhance our understanding of the underlying thermo-fluid physics in a turbocharger turbine associated with heat loss. It will also demonstrate the potential of the application of flow exergy method to 3D CFD data, rather than limited to 1D adiabatic models in current engine research and development.
Recommended Content
Authors
Citation
Lim, S., Kazemi Bakhshmand, S., Biet, C., and Mihaescu, M., "Experimental and Numerical Investigation of a Turbocharger Turbine Using Exergy Analysis at Non-Adiabatic Conditions," SAE Technical Paper 2020-01-2225, 2020, https://doi.org/10.4271/2020-01-2225.Also In
References
- SAE International, Standard Jun. 1995
- SAE International, Standard Mar. 1995
- Burke , R.D. , Vagg , C.R.M. , Chalet , D. , and Chesse , P. Heat transfer in turbocharger turbines under steady, pulsating and transient conditions International Journal of Heat and Fluid Flow 52 185 197 2015
- Lim , S.M. , Dahlkild , A. , and Mihaescu , M. Aerothermodynamics and exergy analysis in radial turbine with heat transfer Journal of Turbomachinery 140 9 2018
- Schinnerl , M. , Seume , J. , Ehrhard , J. , and Bogner , M. Heat Transfer Correction Methods for Turbocharger Performance Measurements Journal of Engineering for Gas Turbines and Power 139 2 2017 10.1115/1.4034234
- Tanda , G. , Marelli , S. , Marmorato , G. , and Capobianco , M. An experimental investigation of internal heat transfer in an automotive turbocharger compressor Applied Energy 193 531 539 2017 10.1016/j.apenergy.2017.02.053
- Burke , R.D. , Copeland , C.D. , Duda , T. , and Rayes-Belmote , M.A. Lumped capacitance and three-dimensional computational fluid dynamics conjugate heat transfer modeling of an automotive turbocharger Journal of Engineering for Gas Turbines and Power 138 9 2016
- Heuer , T. and Engels , B. Numerical Analysis of the Heat Transfer in Radial Turbine Wheels of Turbo Chargers Turbo Expo: Power for Land, Sea, and Air, Volume 3: Turbo Expo 2007 2007
- Serrano , J.R. , Olmeda , P. , Páez , A. , and Vidal , F. An experimental procedure to determine heat transfer properties of turbochargers Measurement Science and Technology 21 3 35109 2010
- Hoepke , B. , Vieweg , M. , and Pischinger , S. Numerical analysis of energy flow paths in exhaust gas turbochargers by means of conjugate heat transfer Journal of Engineering for Gas Turbines and Power 139 6 2017
- Gao , X. , Savic , B. , and Baar , R. A numerical procedure to model heat transfer in radial turbines for automotive engines Applied Thermal Engineering 153 678 691 2019 10.1016/j.applthermaleng.2019.03.014
- Baar , R. , Biet , C. , Boxberger , V. , Mai , H. et al. Moeglichkeiten der direkten Bestimmung des isentropen Turbinenwirkungsgrads Aufladetechnische Konferenz Dresden, Germany 2013
- Zimmermann , R. , Baar , R. , and Biet , C. Determination of the isentropic turbine efficiency due to adiabatic measurements and the validation of the conditions via a new criterion Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232 24 4485 4494 2018 10.1177/0954406216670683
- Savic , B. , Zimmermann , R. , Jander , B. , and Baar , R. New Phenomenological and Power-Based Approach for Determining the Heat Flows of a Turbocharger directly from hot gas test data f 12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics Stockholm, Sweden April 3-7, 2017
- Gao , Xunan , Savic , Bojan , Baar , Roland CHT-Simulation on a turbocharger turbine with resolution of the ambient convective heat flow 13th International Conference on Turbochargers and Turbocharging London, UK May 2018
- Savic , Bojan , Gao , Xunan , Baar , Roland Turbocharger Heat Transfer Determination with a Power Based Phenomenological Approach and a CHT Validation International Symposium on Transport Phenomena and Dynamics of Rotating Machinery Maui, Hawaii December 16-21, 2017
- Savic , B. , Gao , X. , and Baar , R. Turbocharger Heat Transfer Determination With a Power-Based Phenomenological Approach and a Conjugate Heat Transfer Validation Journal of Turbomachinery 141 2 2019 10.1115/1.4041806
- Shaaban , S. , and Seume , J. Impact of turbocharger non-adiabatic operation on engine volumetric efficiency and turbo lag International Journal of Rotating Machinery 2012
- Serrano , J.R. , Guardiola , C. , Dolz , V. , Tiseira , A. et al. 2007
- Lim , S.M. Aerothermodynamics and Exergy Analysis in Turbocharger Radial Turbine KTH Royal Institute of Technology 2018
- Lim , S.M. , Dahlkild , A. , and Mihaescu , M. 2018
- Lim , S.M. , Dahlkild , A. , and Mihaescu , M. Influence of Upstream Exhaust Manifold on Pulsatile Turbocharger Turbine Performance Journal of Engineering for Gas Turbines and Power 141 6 2019
- Romagnoli , A. , Manivannan , A. , Rajoo , S. , Chiong , M.S. et al. A review of heat transfer in turbochargers Renewable and Sustainable Energy Reviews 79 1442 1460 2017