Labyrinth seal for turbine blade dovetail root and corresponding sealing method

摘要

A labyrinth seal (100) that may include a first leg (120) positioned about a high-pressure side (140) of a dovetail tab (70), a second leg (130) positioned about a low-pressure side (150) of the dovetail tab (70), and a labyrinth chamber (110) positioned between the first leg (120) and the second leg (130). High-pressure fluid passing through the gap (90) about the first leg (120) expands within the labyrinth chamber (110) so as to limit an amount of the high-pressure fluid that passes beyond the second leg (130).