Wearing characteristics of rotor and its effect on leakage of finger seals under three different kinds of fit

namely clearance fit

transition fit and interference fit

were experimentally investigated. The wearing of the rotor

wearing length of seal and distribution of leakage coefficient were analyzed. The results show that the wearing is severer when the sliding distance between the seals and the rotor increases. For finger seal with clearance fit

the seal is partially worn and the wear and its effect on the leakage mainly occur at the beginning of the experiment. For finger seal with interference fit

the whole seal is worn and the wear occurs throughout the experiment. The effect of wearing on the leakage is notable at the beginning and then is gradually decreased. The effect of wearing on leakage is greater when the clearance is smaller or the interference is larger.