Performance of a wet-steam turbine stator blade with heating steam injection

Authors

Vladimir Gribin - Moscow Power Engineering Institute, National Research University
Aleksandr Tishchenko - Moscow Power Engineering Institute, National Research University
Sergei Khomyakov - Moscow Power Engineering Institute, National Research University
Ilya Gavrilov - Moscow Power Engineering Institute, National Research University
Victor Tishchenko - Moscow Power Engineering Institute, National Research University
Vitaly Popov - Moscow Power Engineering Institute, National Research University
Ivan Sorokin - Moscow Power Engineering Institute, National Research University
Alekseev Roman - Moscow Power Engineering Institute, National Research University

Abstract

The results of the experimental studies of wet-steam flow with injection of hot steam from the slot downstream of the turbine flat stator blade cascade have been considered. In the studied profile there is one injection slot on the pressure side surface near the trailing edge. The investigations have been carried out at different initial wetness of the main flow and different injected steam temperatures at the constant pressure of injection. Laser diagnostic system "POLIS" which includes PIV method has been used to analyze the influence of heating steam injection on the characteristics of the liquid phase downstream of the blade trailing edge. It is shown a heating steam injection has an effect on the vector fields of coarse droplets downstream of the blade cascade. At the same time kinetic characteristics of coarse droplets downstream of the stator blades cascade are independent of the temperature of the injected steam. Exit angles of coarse droplets obtained at the different distance from the trailing edge are presented.