초록 ▼

The invention provides a turbomachine including a device for supplying pressurized gas, the gas being bled from the compressor of the turbomachine via a bleed orifice and cooled in a cooling cavity disposed within the compressor rotor upstream of the bleed orifice. This arrangement has the effect of

The invention provides a turbomachine including a device for supplying pressurized gas, the gas being bled from the compressor of the turbomachine via a bleed orifice and cooled in a cooling cavity disposed within the compressor rotor upstream of the bleed orifice. This arrangement has the effect of cooling the bled gas by heat transfer through the outer wall of the compressor rotor to the gas stream which is being compressed by the compressor upstream of the bleed orifice, and has the result of reducing the drop in the performance of the compressor as a result of the gas being bled off.

대표청구항 ▼

1. A turbomachine including a rotary compressor having an upstream end, a downstream end and means defining a flow path therebetween through which a stream of gas is compressed as it passes from said upstream end to said downstream end, said compressor including vanes disposed in said flow path and

1. A turbomachine including a rotary compressor having an upstream end, a downstream end and means defining a flow path therebetween through which a stream of gas is compressed as it passes from said upstream end to said downstream end, said compressor including vanes disposed in said flow path and a compressor rotor having an outer wall which is contacted by said stream of gas as it flows along said flow path, and a pressurized gas supply device comprising a gas bleed orifice disposed in said rotary compressor and opening into said flow path thereof, and a cooling cavity disposed within said compressor rotor for cooling the pressurized gas bled from said gas stream via said gas bleed orifice, said cooling cavity comprising an inlet connected to said gas bleed orifice, an outlet, and a cooling surface for contact by said pressurized gas bled from said gas stream as said pressurized gas passes from said inlet to said outlet, said cooling surface being formed at least partly by at least a portion of the outer wall of said compressor rotor upstream of said gas bleed orifice whereby said bled pressurized gas is cooled by heat transfer through said outer wall of said compressor rotor to said gas stream upstream of said gas bleed orifice wherein said cooling surface extends overall from downsteam to upstream, so as to bring said bled pressurized gas against increasingly cooler zones of said cooling surface.