초록 ▼

The performance of the diffuser action of burner shrouds is improved by establishing a substantially uniform velocity profile across the shroud passage by introducing a strong secondary flow in the form of vortices that lead to a better velocity profile and much improved diffuser action in the shrou

The performance of the diffuser action of burner shrouds is improved by establishing a substantially uniform velocity profile across the shroud passage by introducing a strong secondary flow in the form of vortices that lead to a better velocity profile and much improved diffuser action in the shroud passages.

대표청구항 ▼

A burner shroud construction including: inner and outer walls defining a passage for air flow from the compressor, the air flow adjacent the walls being slower than the mid-stream flow; a splitter element cooperating with one of said walls and spaced therefrom to divide the air into combustion air o

A burner shroud construction including: inner and outer walls defining a passage for air flow from the compressor, the air flow adjacent the walls being slower than the mid-stream flow; a splitter element cooperating with one of said walls and spaced therefrom to divide the air into combustion air on one side of the splitter and shroud air which receives the flow adjacent said one wall such that on the other side between the splitter and said one of said walls the air enters with a skewed velocity profile, said element and said cooperating wall defining therebetween a shroud passage; a row of turning vanes extending across said shroud passage to change the flow in said passage and produce a pressure differential on opposite sides of each vane thereby producing vortices between adjacent vanes; and said shroud passage, downstream of the vanes having diverging walls to form a diffuser, the vortices induced by the vanes being a secondary transverse flow thereby improving and making more uniform the velocity profile across the shroud passage at the upstream end of the diffuser to increase the pressure recovery in the diffuser.