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2011年 第5卷 第3期

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《能源前沿（英文）》 >> 2011年 第5卷 第3期 doi: 10.1007/s11708-011-0160-z

Numerical simulation of a new hollow stationary dehumidity blade in last stage of steam turbine

1. School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China; 2. Shanghai Power Equipment Research Institute, Shanghai 200240, China

发布日期： 2011-09-05
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摘要

As a result of adopting saturation steam and long blade, problems of water erosion of last stage blade for steam turbine become more prominent. In order to improve the operation reliability and efficiency of steam turbine, it is necessary to investigate the nonequilibrium condensing wet steam two phase flow and the dehumidity method. A wet steam model with user defined function based on FLUENT software was investigated to simulate the steam condensing flow in the cascades. The simulation consequences show that the pressure variations in simulation depict a good agreement with the experiment data. On the basis of the discrete phase model simulation results and experiment data, the efficiency of existing dehumidity blade with suction slot was calculated. A new stationary dehumidity blade was designed to elevate the dehumidity efficiency: the efficiency in the suction surface was increased by 21.5%, and that in the pressure surface was increased by 12.2%.

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