中国电机工程学报Issue(21)：5533-5541,9.DOI:10.13334/j.0258-8013.pcsee.2015.21.017
汽轮机叶片表面粗糙度对自发凝结级性能影响的数值研究
Numerical Investigation of the Effect of Blade Roughness on the Performance of Steam Turbine Nucleating Stage
摘要
Abstract
In this work, single-stage and multi-stage models are employed to investigate the effect of blade roughness on the performance and spontaneous nucleating processes in steam turbine nucleating stage based on commercial software ANSYS CFX. In all the calculations, the effect of films and rivulets due to the deposition of droplets on the blade surfaces is ignored. The calculated results show that blade surface roughness degrades stage efficiency and the efficiency degradation due to blade roughness increases with the value of roughness under the design condition. Moreover, roughness on stator vanes degrades the stage efficiency more than roughness on rotor vanes. For stator vanes and rotor vanes, the stage efficiency degradation due to roughness on suction side is about 4~5 times as large as that due to roughed pressure side. Results of the current work also indicate that the blade roughness has almost no effect on the aerodynamic losses of the upstream and downstream blades and only affects the aerodynamic loss of the localized blade. In addition, the blade roughness weakens spontaneous nucleation in blade passage, leading to the reduction of liquid mass fraction due to nucleation.关键词
汽轮机/叶片/自发凝结级/粗糙度/级效率/气动损失Key words
steam turbine/blade/spontaneous nucleating stage/roughness/stage efficiency/aerodynamic loss分类
能源科技引用本文复制引用
余兴刚,谢诞梅,王纯,熊扬恒,王聪..汽轮机叶片表面粗糙度对自发凝结级性能影响的数值研究[J].中国电机工程学报,2015,(21):5533-5541,9.基金项目
国家自然科学基金资助项目(51376140)。 Project Supported by National Natural Science Foundation of China (51376140) （51376140）
