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Turbine Housing Boss Design in Turbocharger Application
Technical Paper
2014-01-2849
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Turbochargers are widely used to boost internal combustion engines for both on and off high way applications to meet emission and performance requirements. Due to the high operating temperature, turbochargers are subjected to hostile environment. Low vibration level is one of the key requirements while designing turbo for every application. An engine bracket is employed to support turbine housing to reduce total vibration level. Turbine housing in the turbocharger is commonly equipped with boss to accommodate the engine bracket supporting which eventually includes additional constraints in the turbocharger system. Additional constraints in the turbine housing can lead to adverse impact in the Thermo-Mechanical Fatigue (TMF) life of the housing component. Boss generally has critical influence to thermal stress distribution of the turbine housing. Bad design of boss location could bring severe thermal cracking and surface fracture that leads to loss of functionality and serious accident. Hence it is essential to design the boss appropriately in order to avoid housing cracks and loss of functionality. This paper first presents the current design with two bosses that experienced severe cracking problem in the v-band flange location during the engine thermal shock testing, then exhibits sensitivity analysis results for other three new designs with boss changes by means of finite element analysis (FEA). Considering the manufacture cost and the vibration level, new design III with one boss is selected after simulation. The optimized boss design is qualified with same engine thermal shock test. Both simulation and test endured the successful mitigation of cracking risk. This study provides a knowledge base for the design of turbine housing boss and also identifies a strain fatigue life model based on FEA analysis and testing results.
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Citation
Guo, W., Guo, H., Du, X., and Wang, D., "Turbine Housing Boss Design in Turbocharger Application," SAE Technical Paper 2014-01-2849, 2014, https://doi.org/10.4271/2014-01-2849.Also In
References
- Engineering Properties and Applications of the Ni-Resists and Ductile Ni-ResistsĀ® 1976 The International Company New York, New York
- Spear , W. Ni-Resists-The High Alloy Cast Irons for Heat and Corrosion Resistance 1987 Technical Bulletin No. 58 Ductile Iron Society 66 70
- Covert Roger et. al. Properties and Applications of Ni-Resist and Ductile Ni-Resist Alloys A nickel development institute reference book series No. 11018 1998
- Ahdad F. , Groskreutz M. , Wang H. TMF design optimization for automotive turbochargers turbine housings ASME Turbo Expo2007, Paper no. GT2007-28233 551 557
- Bist S. , Kannusamy R. , Tayal P. , Liang E. Thermomechanical fatigue crack growth and fatigue prediction for turbine housings 9 th Internal Conference on Turbochargers and Turbocharging 2010
- Guo , H. , Du , X. , and Wang , D. A Novel Design and Validation for Turbine Housing Inlet Flange SAE Technical Paper 2013-01-2645 2013 10.4271/2013-01-2645
- Smith RN , Watson P , Topper TH. A stress-strain function of the fatigue of metals J Mater JMLSA 1970 5 767 78
- Coffin LF. A study of the effect of cyclic thermal stresses on a ductile metal Trans Am Soc Mech Eng 1954 76 931 50
- Manson SS. Behavior of materials under conditions of thermal stress National advisory commission on aeronautics: report 1170 Cleveland, OH Lewis Flight Propulsion Laboratory 1954