Mixing ducts for a gas-turbine annular combustion chamber

Details Mixing ducts for a gas-turbine annular combustion chamber Mixing ducts for a gas-turbine annular combustion chamber

1996-11-18

1998-11-24

Thorpe, Timothy

Power plants

Combustion products used as motive fluid

Combustion products generator

60747, 60751, 60 3906, F23R 312, F02C 300

Patent

active

058392831

ABSTRACT:
In a gas-turbine annular combustion chamber (4) which is arranged downstream of a compressor (1) and is equipped on its front plate with at least one row of premix burners (5) arranged in an annular form, in each case a combustion-air duct (15) designed as a diffuser leads directly downstream of the compressor outlet from the guide vanes (9) of the last compressor row to each burner (5), at the downstream end of which combustion-air duct (15) at least one longitudinal-vortex generator (16) is located, at least one fuel injection means (17) being provided in or downstream of the longitudinal-vortex generator (16). A mixing duct (19) which ends in the combustion chamber (4) and has a constant height (H) and a length (L) which corresponds approximately to twice the value of the hydraulic duct diameter (D) is arranged downstream of the fuel injection means (17). The overall size of the gas turbine in the region of the combustion chamber (4) can thereby be substantially reduced. In addition, the pressure loss between compressor outlet and turbine inlet is reduced.

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