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Preliminary Design Considerations for Variable Geometry Radial Turbines with Multi-Points Specifications

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ISAE-SUPAERO, Université de Toulouse, 31400 Toulouse, France
2
Research and Expertise Department, Liebherr-Aerospace Toulouse SAS (LTS), 31016 Toulouse, France
*
Authors to whom correspondence should be addressed.
This paper is an extended version of our paper published in Proceedings of the European Turbomachinery Conference ETC12 2017, Paper No. 129.
Int. J. Turbomach. Propuls. Power 2018, 3(4), 22; https://doi.org/10.3390/ijtpp3040022
Received: 23 July 2018 / Revised: 24 October 2018 / Accepted: 26 October 2018 / Published: 8 November 2018
Radial turbines’ preliminary designs are usually carried out through some dimensionless approaches, such as the loading-to-flow-diagram and/or the blade speed ratio. In case of variable nozzle radial turbines, multi-points specifications must be considered, related to the improvement of the operating range. As preliminary design correlations and standards usually taken into consideration arise from studies dedicated to fixed geometry radial turbines, they need to be updated with regard to nozzle off-design opening configurations. This paper provides some theoretical basics in order to help designers considering variable geometry problems. Some complementary elements about the dimensionless methods are given by taking into account the nozzle opening effect. Then, useful considerations are brought regarding the preliminary design of variable geometry radial turbines with multi-points specifications. View Full-Text
Keywords: radial inflow turbines, variable geometry turbines, preliminary design, multi-points specifications radial inflow turbines, variable geometry turbines, preliminary design, multi-points specifications
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MDPI and ACS Style

Lauriau, P.-T.; Binder, N.; Cros, S.; Roumeas, M.; Carbonneau, X. Preliminary Design Considerations for Variable Geometry Radial Turbines with Multi-Points Specifications. Int. J. Turbomach. Propuls. Power 2018, 3, 22.

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