INVESTIGATION ON HIGH TEMPERATURE STEAM EFFECT OF BRUSH SEALS FOR STEAM TURBINE

摘要

1. Hybrid seal showed exceptional sealing performance. The performance was more improved under super-heated steam condition, compared to compressed air. Thermal expansion and steam itself both play an important role for the sealing. 2. Mean clearance and weight loss showed abrasive wear and material transfer to bristles. Substantial amount of oxidation film was produced under high-temperature steam condition.