To study the flow characteristics of a labyrinth seal in a compressor stator well

numerical simulations on the performances of a labyrinth seal with inlet and outlet rotating disc cavities of an aero-engine compressor was carried out. Sealing characteristics

swirl characteristics and windage heating characteristics were studied in depth at pressure ratio range 1.05-1.30 and Reynolds number range 100-50000. The differences of the flow characteristics of straight-through labyrinth with/without inlet and outlet rotating disc cavities were compared. The computational results show that inlet and outlet rotating disc cavities have obvious influence on the flow of the labyrinth. With the increase of pressure ratio

the discharge coefficient increases

and the sealing effect grows worse

while the outlet swirl ratio and windage heating decreases. With the increase of Reynolds number

the discharge coefficient increases significantly

the outlet swirl ratio and windage heating decreases. At high Reynolds number

the discharge coefficient

outlet swirl ratio and windage heating changes slightly.