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Numerical Simulation on Vortex Cooling and Extraction System in Ultra-Supercritical Steam Turbine

Author: ZuoHuaiXi
Tutor: DuChaoHui
School: Shanghai Jiaotong University
Course: Engineering Thermophysics
Keywords: Turbine Swirl cooling Steam extraction CFD
CLC: TK261
Type: Master's thesis
Year: 2011
Downloads: 57
Quote: 0
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Abstract


Energy saving and environmental protection is the future direction of the development of new energy technologies , ultra-supercritical steam turbine as a typical representative of the technology has broad application prospects . Ultra-supercritical steam turbine technology , cooling hot parts is a key technology , will have an impact on the safe operation of the unit with life , the vortex cooling as a simple and efficient way of cooling , it is worth further research and application . While cooling hot parts , but also need to improve the thermal efficiency of the steam turbine , the extraction steam technology not only to improve the thermal efficiency of the steam turbine , and also reduce the last stage blades of water erosion , this study is very meaningful . This article on a particular model in ultra-supercritical steam turbine pressure cylinder flow field of the eddy current cooling technology with steam extraction system of research and analysis . In the course of the study , the first to establish four different into the steam pipe shape cooling model , the typical flow field data by the comparative analysis of the different model parameter description cooling . In addition , by comparing the maximum temperature difference , reduce traffic unit temperature , to study and analyze the cooling effect of the cooling efficiency , so as to find the optimal cooling model . Finally, on the basis of the above - described optimal shape model of the steam inlet pipe , by changing the angle of the steam inlet , further study of the angle of inlet steam cooling effect , found that optimal cooling efficiency and uniform cooling of the steam inlet angle 45 ° effect , it is worth the applications in the research design . Turbine thermal efficiency , this study analyzed a particular model ultra-supercritical steam turbine extraction steam pressure cylinder flow field . Through the analysis of a typical cross-section of the flow field data , given the distribution of the different extraction tubule flow rate and pressure loss , find out the maximum area of the total pressure loss and CFD calculations the engineering manual calculation of the results based on the results were analyzed , both basically the same , and thus provide some reference for engineering applications .

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CLC: > Industrial Technology > Energy and Power Engineering > Steam Power Engineering > Steam turbine (steam turbine,steam turbine ) > Theory
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