2013 Volume 79 Issue 804 Pages 1724-1736
This paper describes characteristics of moisture losses in low pressure steam turbine stages. Steam turbines operating under wet-steam conditions experience thermodynamic and mechanical losses caused by the presence of moisture. In order to predict the moisture losses, physics-based moisture loss models are developed. The moisture loss models are composed of six categories: supersaturation loss, condensation loss, acceleration loss, braking loss, capturing loss and pumping loss. These losses are calculated according to the wetness levels in the stationary blade & moving blade rows, and defined by the functions of steam properties and design factors of turbine stages. The loss models are compared to full-size low pressure steam turbine data for prediction of the overall moisture losses. The developed loss models are found to be effective for designing wet-steam turbines from the standpoint of calculation accuracy and calculation time.
Transactions of the Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers Series A
Transactions of the Japan Society of Mechanical Engineers Series B
Transactions of the Japan Society of Mechanical Engineers Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the JSME (in Japanese)
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
