The Influence Of Cooling Air System For Gas Turbine Thermal Performance

The main research content of this article is established considering the effects ofcooling air thermal performance calculation model of gas turbine. In computing softwarematlab as a programming tool, respectively set up compressor, combustion chamber,turbine calculation model of three components, fitting of three modules of interface,achieving the overall thermodynamic calculation of the gas turbine.For the gas turbine cooling system overview. Calm cascade analysis, dynamic blade,leaf end wall, moving under the top of the heat transfer characteristics and influencefactors of heat transfer were discussed on the film cooling. The gas turbine cooling airvolume estimation model was established, further flowster software is applied to makeblade cooling simulation design; Write the working medium (air, gas, water vapor)thermal physical property parameters calculation of program; With matlab software forprogramming platform, the establishment of a gas turbine compressor module, combustionchamber module, thermal performance calculation model of turbine module, according tothe simple loop structures, interface module parameters, considering the cooling turbineblades of gas turbine compressor suction to the influence of thermodynamic calculation.Given the same initial temperature, the same flow, compared with and without cooling aircooling air case, gas turbine than changes in the work and efficiency. Further compared tothe same amount of cooling air, distribution of different cases, the gas turbine changesthan work and efficiency; And the same cooling air distribution, different amount ofcooling air case, gas turbine than the change of work and efficiency. Combining with300mw class gas turbine design project, the different performance of the turbine initialtemperature and different pressure than the estimates. The turbine initial temperature andcooling air volume affect the performance of unit circulation has carried on the qualitativeanalysis. According to the model calculation of300mw class gas turbine designparameters are presented.