Transfer tube system routing through limited space for gas turbine engine bleed system

A transfer tube system for connecting between a compressor and a bleed unit of a turbomachine defined about a longitudinal axis that extends in a longitudinal direction, the transfer tube system comprising:

• a valve assembly with a first inlet and a second inlet, the valve assembly disposed to control gas flow from the compressor through a bleed system, the valve assembly disposed outside the turbomachine;
• a first port in fluid communication with the compressor, the first port disposed in the turbomachine at the compressor;
• a second port in fluid communication with the compressor, the second port disposed in the turbomachine at the compressor;
• a strut having an interior space, the strut extending in a radial direction, at least partly, between the compressor and the valve assembly, the strut extending in the longitudinal direction across the compressor and radially outside from the compressor;
• a first conduit configured as a first bleed tube connected between the first port and the first inlet, the first conduit configured to convey a first gas flow between the compressor and the valve assembly;
• and
• a second conduit configured as a second bleed tube connected between the second port and the second inlet, the second conduit configured to convey a second gas flow between the compressor and the valve assembly,
• wherein both the first conduit and the second conduit extend through the interior space of the strut,
• wherein the first conduit includes a first pair of bellows disposed in the interior space of the strut and the second conduit includes a second pair of bellows disposed in the interior space of the strut,
• wherein the first conduit includes a first connection coupled with the first port and a second connection coupled with the first inlet,
• wherein the second conduit includes a third connection coupled with the second port and a fourth connection coupled with the second inlet,
• wherein each of the first conduit and the second conduit is curved and each extends from a respective inlet flange at the compressor to a respective exit flange at the valve assembly, each respective exit flange disposed at a different angle as compared to its respective inlet flange,
• wherein, between the first pair of bellows, the first conduit has a first central section with a first non-circular shaped cross section in the interior space of the strut,
• wherein, between the second pair of bellows, the second conduit has a second central section with a second non-circular shaped cross section in the interior space of the strut.

A transfer tube system for connecting between a compressor and a bleed unit of a turbomachine defined about a longitudinal axis that extends in a longitudinal direction, the transfer tube system comprising:

• a valve assembly in the bleed unit that has a first inlet and a second inlet, the valve assembly disposed to control bleed air flow from the compressor through a bleed system, the valve assembly disposed outside the turbomachine;
• a first port in fluid communication with the compressor and configured to receive a first pressure, the first port disposed in the turbomachine at the compressor;
• a second port in fluid communication with the compressor and configured to receive a second pressure, wherein the second pressure is different than the first pressure, the second port disposed in the turbomachine at the compressor;
• a strut having an interior space, the strut extending in a radial direction, at least partly, between the compressor and the valve assembly and through a bypass duct of the turbomachine, the strut extending in the longitudinal direction across the compressor and radially outside from the compressor;
• a first conduit configured as a first bleed tube connected between the first port and the first inlet, the first conduit configured to convey a first flow of bleed air between the compressor and the valve assembly;
• and
• a second conduit configured as a second bleed tube connected between the second port and the second inlet, the second conduit configured to convey a second flow of bleed air between the compressor and the valve assembly,
• wherein both the first conduit and the second conduit extend through the interior space of the strut,
• wherein the first conduit includes a first connection coupled with the first port and a second connection coupled with the first inlet,
• wherein the second conduit includes a third connection coupled with the second port and a fourth connection coupled with the second inlet,
• wherein the first conduit includes a first pair of bellows disposed in the interior space of the strut and the second conduit includes a second pair of bellows disposed in the interior space of the strut,
• wherein, between the first pair of bellows, the first conduit has a first central section with a first non-circular shaped cross section in the interior space of the strut,
• wherein, between the second pair of bellows, the second conduit has a second central section with a second non-circular shaped cross section in the interior space of the strut,
• wherein each of the first conduit and the second conduit is curved and each extends from a respective inlet flange at the compressor to a respective exit flange at the valve assembly, each respective exit flange disposed at a different angle as compared to its respective inlet flange,
• wherein the first conduit has a spine comprising a smooth curve connecting an inlet vector at the first port and an exit vector at the first inlet, wherein the spine is substantially S-shaped.