Stator blades of turbomachines

摘要: In turbomachine apparatus having alternating rows of stator blades and rotor blades, there is provided discontinuities or nonuniformities on the downstream facing surfaces at least one row being adapted to disperse pressure waves reflected from blades. The may be an arrangement grooves, ridges, a combination grooves ridges blade surfaces; other surface discontinuity configurations are also possible, such as potruding elements dimples, force-absorbing material selectively deposited dowstream-facing portion surfaces.