12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics

Paper ID:

ETC2017-129

Main Topic:

Radial Turbines

https://doi.org/10.29008/ETC2017-129

Authors

Pierre-Thomas Lauriau - ISAE / LIEBHERR AEROSPACE
Nicolas Binder - ISAE
Xavier Carbonneau - ISAE
Sandrine Cros - LIEBHERR AEROSPACE
Mathieu Roumeas - LIEBHERR AEROSPACE

Abstract

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, associated to the improvement of the operating range. As preliminary design correlations and stan-dards usually taken into consideration arise from fixed nominal geometry radial turbines studies, 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 vari-able geometry problems. Some complementary elements about the dimensionless meth-ods 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.

Download it! Paper is available for download