Study of the establishment of turbine rotor steam-cooling calculation models

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College of Energy Sciences and Engineering, Harbin Institute of Technology, Harbin 150001, China ^{[1
]}

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Reneng Dongli Gongcheng | 2007年 / 2卷 / 142-145期

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摘要：

To raise initial parameters is an important measure for achieving energy savings and environmental protection, two national policies for coal-fired power plants. Under the condition of an enhanced initial steam temperature, the heat endurance properties of materials need to be upgraded simultaneously with the adoption of a steam cooling technology to lower the temperature and thermal stress of the turbine rotor, thereby guaranteeing the strength and service life of turbine parts and other components. In meeting the features of a quick and accurate calculation method required by engineering designs, a one-dimensional parameter calculation model was established for blade root cooling of rotors. The model can comprehensively accommodate all the influencing factors, including the jet-flow impact cooling of steam on the blade surface and heat conduction cooling by steam passing through the rotor root portion. The model has been used to calculate the temperature profile in the first stage of the medium pressure cylinder of a supercritical steam turbine unit. The comparison of the calculation results with three-dimensional ones indicates that the model can meet relevant engineering design requirements.

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