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Experimental study and modelling of the ventilation power and maximum temperature of low-pressure steam turbine last stages at low load

Author:
Mambro, Antonio, Congiu, Francesco, Galloni, Enzo, Canale, Laura
Source:
Applied energy 2019 v.241 pp. 59-72
ISSN:
0306-2619
Subject:
equations, models, temperature, turbines
Abstract:
Experimental investigations on the behavior of a low-pressure turbine operating at low volume flow have been carried out. Detailed analysis of the measurements reveal a series of macroscopic correlations useful for both understanding and modelling the whole low volume flow phenomenon. A novel concept of blade saturation temperature has been introduced, while a non-dimensional group has been identified in order to provide the best correlation with the measured ventilation power. A comparison of existing ventilation power equations has been carried out, showing a clear improvement of the proposed correlation over existing ones. Finally, a simplified approach able to predict both ventilation power and maximum flow temperature is presented.
Agid:
6334179