Abstract:The static and dynamic performances of finger seals were tested by simulating the real condition of aeroengine and compared with that of conventional brush seals.The effects of rotating speed,pressure ratio and temperature on the leakage characteristics of finger seal were studied.The testing results show that the finger seal has excellent sealing performance.The leakage parameters of finger seal is first increased and then gradually tend to a constant with the increase of pressure ratio.Under the test speed range,the leakage parameter is decreased with the increase of rotating speed.With the increase of temperature,the leakage parameter is also decreased.Compared with conventional brush seal,the static leakage parameter of finger seal is reduced from 8% to 41%,the dynamic leakage parameter is reduced by 18%.