Directing against the phenomenon of big clearance commonly existing in flow passage of steam turbines in operation of power-generation units

the influence of big clearance in flow passage of steam turbines upon the relative internal efficiency and power has been studied through calculation.Study shows that the big clearance in flow passage of steam turbines leads to increase the steam leakage loss

having comparatively large influence upon both the relative internal efficiency and power of high-pressure cylinder in steam turbines.It has been pointed out that the necessity of carrying out condition monitoring for the clearance in flow passage of steam turbines

so as to provide basis for repair of flow passage in steam turbines and for energy-saving.