实验流体力学2011，Vol.25Issue(5)：64-69,6.
汽轮机低压排气缸内流场的PIV实验研究
PIV experimental investigation of the flow field in a low-pressure exhaust hood of a stream turbine
谢伟亮 1王红涛 1竺晓程 1周代伟 2杜朝辉1
作者信息
- 1. 上海交通大学,上海200240
- 2. 上海电气电站集团,上海 200240
- 折叠
摘要
Abstract
The flow structure in a low-pressure exhaust hood model of a stream turbine was investigated using a time-resolved particle image velocimetry (TR-PIV). The velocity vector and the vorticity contours of some characteristic plane of the exhaust hood model were gained through measurement. Several vortexes were observed at the top of the model, and they combined together to form a large passage vortex during flowing down to the outlet. This passage vortex movement played a main role in the flow field of the model with the vorticity of it decreasing gradually. Another invention of the experiment was that baffles arranged at the bottom of the model could compel the fluid to flow along the direction of the mainstream, which would give a positive impact on the improvement of the performance of the exhaust hood.关键词
排气缸/PIV/涡/速度矢量/涡量Key words
exhaust hood/PIV/vortex/velocity vector/vorticity分类
能源科技引用本文复制引用
谢伟亮,王红涛,竺晓程,周代伟,杜朝辉..汽轮机低压排气缸内流场的PIV实验研究[J].实验流体力学,2011,25(5):64-69,6.
