汽轮机排汽通道内湿蒸汽流动的数值研究  

Numerical Study of the Wet Steam Flow in the Steam Exhaust Passage of a Steam Turbine

作　　者：曹丽华[1] 张浩龙[1] 林文斌 刘佳[3] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林吉林132012 [2]福建中试所电力调整试验有限责任公司,福建福州350007 [3]山东电力工程咨询院有限公司,山东济南250013

出　　处：《热能动力工程》2015年第3期387-393,492,共7页Journal of Engineering for Thermal Energy and Power

基　　金：吉林省科技发展计划资助项目(20140204040SF)

摘　　要：为分析湿蒸汽在汽轮机排汽通道内的流动状况,利用FLUENT软件,结合相变模型和湿蒸汽流动方程,对不同来流条件下排汽通道内的流动进行了数值模拟。结果表明:进汽湿度、旋流强度和进汽角的变化使通道涡的组成、位置及强度发生变化;随着进汽湿度的增加,排汽通道出口流场的均匀性有一定的提高;随着进汽湿度、旋流强度、进汽角度的增加,排汽通道内流动的能量损失系数降低。To analyze the flow conditions of the wet steam in the steam exhaust passage of a steam turbine,the software Fluent was used to conduct a numerical simulation of the flow inside the exhaust passage under various incoming flow conditions in combination with a phase-change model and a wet steam flow equation. It has been found that changes in the inlet steam wetness,swirling intensity and steam inlet angle will force the composition,location and intensity of the vortexes in the passage to produce changes. With an increase of the inlet steam wetness,the uniformity of the flow field at the outlet of the exhaust steam passage will enhance to a certain extent. With an increase of the inlet steam wetness,swirling flow intensity and steam inlet angle,the energy loss coefficient of the flow inside the exhaust steam passage will decline.

关 键 词：汽轮机 排汽通道 湿蒸汽 数值分析 

分 类 号：TK261[动力工程及工程热物理—动力机械及工程]