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Compressible Turbulent Flow Analysis on Variable Nozzle Vane and Spacer in Turbocharger Turbine
Technical Paper
2000-01-0526
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE 2000 World Congress
Language:
English
Abstract
In order to develop a high-performance turbocharger turbine, compressible turbulent flow analysis is applied to the complicated flow around the nozzle vanes and the spacers. The flow analysis indicates that a combination of a curved nozzle vane and a round spacer causes a low-velocity region at the inner side of the nozzle vane even when the turbine efficiency is highest. As a result of the loss analysis, a teardrop-shaped spacer, which suppresses the low-velocity region and flow separation, is developed, and shown to improve the turbine efficiency. The easiness of the nozzle vane control is also important as well as the high efficiency. The fluid force on the nozzle vane depends on the flow pattern; therefore, the torque about the pivot of the nozzle vane is also numerically calculated.
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Citation
Fukaya, M., Watanabe, M., and Udagawa, T., "Compressible Turbulent Flow Analysis on Variable Nozzle Vane and Spacer in Turbocharger Turbine," SAE Technical Paper 2000-01-0526, 2000, https://doi.org/10.4271/2000-01-0526.Also In
References
- O'Connor, G. F. Smith, M. M. “Variable Nozzle Turbochargers for Passenger Car Applications” SAE Paper 880121 1988
- Computational Dynamics Ltd STAR-CD V3.0 Theory Manual Olympic House London 1996
- Spraker, W. A. “The Aerodynamic Design of Variable Power Turbines of Turbocharger” SAE Paper, 920041 1992
- Mizumachi, N. “A Study of Radial Gas-Turbine” Report of the Institute of Industrial Science Univ. of Tokyo 8 1 1958