摘要
通过对中压缸带汽封通流级的数值模拟,分析了迷宫式汽封的气动特性,并通过对有无汽封装置的通流级流动状况的比较,明确了泄漏气流对叶片的气动性能有一定的影响,尤其是在动叶的根部和静叶的顶部,干扰效果明显.指出:汽封装置对流动效率的影响明显.建议在现有基础上进行汽封改型,以提高机组效率.
The aerodynamic performance of labyrinth gland was analyzed through the numerical simulation of intermediate pressure （IP） flow stage with labyrinth gland. By comparison of the flowing status for the turbine stage with and without the gland, it is found that the seal leakage has certain influence on the aerodynamic performance of the blades, especially at the rotor blade root and stator blade tip with evident effects. It is pointed out that, the gland has evident effects on the flowing efficiency. It is suggested that the type of the gland be reformed to enhance the unit＇s efficiency.
出处
《动力工程》
CSCD
北大核心
2009年第8期743-746,共4页
Power Engineering
关键词
汽轮机
迷宫式汽封
气动性能
数值模拟
steam turbine
labyrinth gland
aerodynamic performance
numerical simulation
