The Design and Analysis of Helium Turbine Expander Impeller with a Given All-Over-Controlled Vortex Distribution |
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Authors: | LIU Xiaodong FU Bao ZHUANG Ming |
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Affiliation: | Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China |
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Abstract: | To make the large-scale helium cryogenic system of fusion device EAST(experimental advanced super-conducting tokamak)run stably,as the core part,the helium turbine expander must meet the requirement of refrigeration capacity.However,previous designs were based on one dimension flow to determine the average fluid parameters and geometric parameters of impeller cross-sections,so that it could not describe real physical processes in the internal flow of the turbine expander.Therefore,based on the inverse proposition of streamline curvature method in the context of quasi-three-dimensional flows,the all-over-controlled vortex concept was adopted to design the impeller under specified condition.The wrap angle of the impeller blade and the whole flow distribution on the meridian plane were obtained;meanwhile the performance of the designed impeller was analyzed.Thus a new design method is proposed here for the inverse proposition of the helium turbine expander impeller. |
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Keywords: | helium turbine expander streamline curvature method meridian plane allover-controlled vortex inverse proposition |
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