초록 ▼

In turbomachine apparatus having alternating rows of stator blades and rotor blades, there is provided discontinuities or nonuniformities on the downstream facing surfaces of at least one row of stator blades, the nonuniformities being adapted to disperse pressure waves reflected from downstream rot

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

대표청구항 ▼

In combination in a turbomachine, a casing, at least one row of spaced stator blades, with stator flow passages therebetween, mounted therein and extending inwardly therefrom, a rotor positioned in said casing for rotation about an axis and having mounted thereon at least one row of spaced rotor bla

In combination in a turbomachine, a casing, at least one row of spaced stator blades, with stator flow passages therebetween, mounted therein and extending inwardly therefrom, a rotor positioned in said casing for rotation about an axis and having mounted thereon at least one row of spaced rotor blades, with rotor flow passages therebetween, at least one of said rows of stator blades having blade surfaces facing downstream toward one row of said rotor blades, at least some of said downstream facing surfaces having discontinuity groove means positioned adjacent one another and disposed on at least 5% of said blade surfaces and extending substantially at 0°to the main flow direction to points inward from the trailing edges of said stator blades for dispersing pressure waves reflecting from said one row of said rotor blades.