LAUSR

Abstract A new type of seal, called a T type labyrinth seal is proposed to reduce exciting force induced by seal region flow, thereby reducing rotor vibration in aero-engines. The whole circle computational model is performed, and the vibration characteristics parameters are defined at the boundary of the seal flow field to consider the effect of rotor vibration. The new type seal is analyzed along with the interlaced and straight through labyrinth seals. The enhanced Lomakin effect of seal flow field caused by the T-shaped tooth contributes to the great increase in the inward radial aerodynamic force. With the same axial length of the seal and the tip clearance, the leakage of T seal is approximately 23.6–25.3% less than the straight through labyrinth seal, and approximately 7.4–8.5% more than the interlaced labyrinth seal.