CUED Publications database

Non-equilibirum condensation effects on the flow field and the performance of a low pressure steam turbine

Starzmann, J and Casey, M and Sieverding, F Non-equilibirum condensation effects on the flow field and the performance of a low pressure steam turbine. In: Proceedings of ASME Turbo Expo 2010, 2010-6-14 to 2010-6-18, Glasgow, UK. (Unpublished)

Full text not available from this repository.

Abstract

The influence of non-equilibrium condensation on the flow field and performance of a three stage low pressure model steam turbine is examined using modern three dimensional CFD techniques. An equilibrium steam model and a non-equilibrium steam model, which accounts for both subcooling and condensation effects, are used, and have been verified by comparison with test data in an earlier publication [1]. The differences in the calculated flow field and turbine performance with these models show that the latent heat released during condensation influences both the thermodynamic and the aerodynamic performance of the turbine, leading to a change in inlet flow angles of about 5°. The calculated three dimensional flowfield is used to investigate the magnitude and distribution of the additional thermo-dynamic wetness loss arising from steam condensation under non-equilibrium flow conditions. Three simple methods are described to calculate this, and all show that this amounts to around 6.5% of the total losses at the design condition. At other load conditions the wetness losses change in magnitude and axial distribution in the turbine. © 2010 by ASME.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div A > Fluid Mechanics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:07
Last Modified: 01 Aug 2017 03:03
DOI: