摘要
分别对海豚型叶型和常规设计的蒸汽轮机叶型进行了一级全三维气液两相数值计算,对比发现所设计的海豚型叶型在改善常规叶型流场的气动性能、提高汽轮机轮周效率的同时,可以提高流道内叶片段区域的湿蒸汽干度,改善流道内湿蒸汽的分布。海豚型叶型具有短的扩压段,使激波和附面层干扰区域具有更强的防汽流脱落能力,这样可减少此区域内水膜被高速汽流急剧撕裂成二次水滴的可能。海豚型叶型通道内湿蒸汽湿度沿叶高的分布特点有利于在叶片上表面开设除湿槽,进行高效除湿。
A new kind of steam turbine last stage with the dolphin blade instead of the traditional blade was introduced for investigation.The flow fields of the dolphin blade and the traditional blade cascade were comparatively analyzed by two-phase flow numerical simulation of steady three dimensional N.S solvers based on wet steam physics characteristics.The computation results indicate that the use of the dolphin cascade effectively improves the aerodynamic performance of the flow flied,the stage wheel efficiency ...
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2008年第S2期28-33,共6页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(50576017).
关键词
动力机械工程
汽轮机
两相流
海豚型叶片
湿蒸汽
power machinery and engineering
steam turbine
two phase flow
dolphin blade
wet steam
