Device for water or steam injection into the working medium of a gas turbine

The device has an external connection housing including a radial housing portion connected to an outlet of a compressor (1), a bend portion and an axial housing portion connected to an intake of a combustion chamber. Injection nozzles are arranged in a region of the bend. The injection nozzles inject water or water vapor into the flow of combustion air compressed by the compressor. An independent claim is also included for a gas turbine plant comprising a compressor.