| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for calculating a moisture loss in a steam turbine operating under wet steam conditions. SOLUTION: The method may include steps of: (1) assuming equilibrium expansion, calculating flow field initialization to determine initial pressure values, an initial expansion rate, initial velocity values at an inlet and an exit of each of a plurality of blade rows in the steam turbine, and initial enthalpy values through each of the plurality of blade rows in the steam turbine; (2) using the initial pressure values, the initial velocity values, and the initial enthalpy values, calculating an initial steam subcoolingΔT value through each of the plurality of blade rows of the steam turbine; (3) calculating an Wilson Point critical subcoolingΔT value through each of the plurality of blade rows of the steam turbine required for spontaneous nucleation to occur based on the initial pressure value and the initial expansion rate; and (4) comparing the initial steam subcoolingΔT values to the Wilson Point critical subcoolingΔT values to determine where spontaneous nucleation occurs through the plurality of blade rows of the steam turbine. COPYRIGHT: (C)2009,JPO&INPIT
|
