AXIAL MULTI-STEP COMPRESSOR WITH WATER INJECTION INTO FLOW PART THEREOF Russian patent published in 2021 - IPC F04D19/02 

FIELD: heat power engineering.

SUBSTANCE: invention relates to the field of heat power engineering, in particular to power gas turbine units (hereinafter referred to as GTU) with axial multi-step compressors for compressing atmospheric cyclic air. The axial multi-step compressor comprises a body with a blade apparatus with steps placed therein, wherein each step includes working and guiding blades. Each of at least two of the guiding blades thereof has therein a through longitudinal cavity and is installed with one end in the body and the other in an annular band with an intermediate seal defining the annular hollow in the rim of the carrier disk on the side of the outer side surface thereof. Connected to each through longitudinal cavity in at least two of the above guiding blades therein on the side of the body is a cooling water pipeline, and on the side of the annular band is a jet nozzle attached to the band ring, placed in the annular hollow in the rim of the carrier disk, and facing the bottom of the annular hollow at an acute angle to the radius of the rim of the carrier disk. Provided above the annular hollow in the rim of the carrier disk therein is an annular recess communicating therewith and at least two radial channels communicating the annular recess with the volume between the inner surface of the body and the outer surface of the rim of the carrier disk.

EFFECT: ensured dispersion of the cooling liquid using the factors of high-speed rotation of the compressor rotor; reduction in the gas-dynamic losses from admixing finely dispersed moisture to the compressed air; increase in the duration of stay of all formed liquid drops in the flow of the stepwise compressed air; and ensured complete evaporation of the cooling water in the flow part of the compressor of the GTU with the liquid flow rate sufficient for stabilising the power of the GTU at the nominal level when the initial temperature of the compressed air is increased from +15 to +40°C.

3 cl, 2 dwg