Flow guiding device for cooling turbine inlet working substance

Abstract

The invention provides a flow guiding device for cooling turbine inlet working substance. The device comprises a body axially confined between a combustion chamber and a turbine. An annular cavity isformed inside the body, and a plurality of working substance channels guiding the working substance from the combustion chamber to the turbine are formed in the annular cavity. The working substance channels comprise at least tapered sections, wherein flow guiding plates on both sides are gradually approached. The flow guiding plates on both sides are fixedly connected to the inner and outer surfaces of the annular cavity. The device has the advantages that the working substance flows into a turbine inlet after accelerated cooling through the working substance channels, so that the restrictionof the turbine blade thermal load on the outlet temperature of the combustion chamber is removed. In addition, the initial velocity of the working substance entering the turbine inlet is higher, theefficiency of the turbine stage is improved, greater thrust is generated, the output during the start-up phase SFC is reduced, and power consumption of the gas turbine is reduced.

Description

technical field [0001] The invention relates to the technical field of turbine working fluid pretreatment, in particular to a flow guiding device for cooling the inlet working fluid of a turbine. Background technique [0002] Modern gas turbines are constantly developing towards high parameters and high efficiency. Increasing the outlet temperature of the combustion chamber (that is, the inlet temperature of the turbine) can increase the output of the gas turbine and improve the efficiency of the gas turbine, which is the current development direction of the equipment. However, with the continuous increase of turbine inlet temperature, the temperature of the gas in the turbine has far exceeded the allowable temperature of the blade material, and the increase of the gas temperature also leads to an increase in the thermal load and thermal stress of the blade, which has great impact on the design of the turbine. posed serious challenges. [0003] Turbine blades rotate and do ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a diversion device that realizes the automatic cooling of the high-temperature working fluid in the combustion chamber and then sends it to the turbine inlet, so as to solve the problem of turbine cooling and overcome the restriction of the high-temperature performance of the turbine on the efficiency of the gas turbine

Images