关键词: 航空发动机;压气机;旋转密封;迷宫密封件;雷诺数

Abstract: Labyrinth seals are widely used as sealing elements in aeroengine.To satisfy the imperative need of leakage and heat transfer characteristics of labyrinth seal in aeroengine, we built a big scale inhale labyrinth heat transfer wind tunnel. We made the detailed investigation of two dimensional flow field in the cavity of labyrinth seals. Detailed experimental results on the flow field reveal the two dimensional velocity and vortiex distributions in the cavity of labyrinth seal and local heat transfer coefficient distribution on the roof of labyrinths. Analyzing the results obtained at different Reynolds numbers and T/C , we found the influence on the velocity and pressure distribution in cavity of labyrinth and the influence of different Reynolds numbers and T/C on the heat transfer coefficient on the roof of labyrinth seal.

Key words: Aircraft engine;Air compressor;Rotarysealing;Labyrinth seal;Reynolds number