Experimental investigation of effect of tooth geometrical parameters to flow characteristics in slant labyrinth seals

摘要

An experiment investigation was made to study the influence of the geometry parameters ofslant straight-through labyrinth seals on sealing characteristics. 22 models with different geometryparameters were designed, and the geometry parameters studied include seal clearance, finheight, fin pitch, fin tip thickness, and fin number. The results showed that, when p_0/p_n rangedfrom 1.2 to 1.8, the discharge coefficient increased with the drop pressure ratio, seal clearance,and fin tip thickness and decreased with fin height, fin pitch, and fin number. The rank of sensitivityof each parameter's variation in the unit size on sealing characteristics is seal clearance, fin tipthickness, fin pitch, back angle, fin height, and front angle. The correlation of different parameterswere summarized for the designing of advanced labyrinth seals.