双区加热型汽轮机排汽湿度探针测量方法探讨  

Turbine Exhaust Wetness Measurement Based on Double-Region-Heating Probe Method

作　　者：章健[1] 庞智[2] 杨善让[2] 

机构地区：[1]广西电力工业勘察设计研究院火电部,广西南宁530023 [2]东北电力大学节能与测控技术研究中心,吉林吉林132012

出　　处：《发电设备》2008年第5期369-372,共4页Power Equipment

摘　　要：介绍了双区加热法测量蒸汽湿度的热力学基本原理,并对探针汽液两相区流动压降进行了计算,得出了判定探针蒸发段管长大于水滴汽化长度的热力学检测标准,为保证探针在测量汽轮机排汽湿度时的准确性提供了理论依据。The basic thermodynamic principle of double-region-heating probe method for steam wetness measurement is being presented, while the pressure drop of steam-liquid two-phase flow in the probe calculated and thus a thermodynamic judgment criteria obtained for determining whether the length of the probe tube＇ s evaporating section is larger than that of the water drop vaporization. This may serve as a theoretical basis for improving the precision of turbine exhaust wetness measurement by probe method.

关 键 词：能源与动力工程 汽轮机 排汽湿度 双区加热法 汽液两相流 水滴汽化长度 

分 类 号：TK31[动力工程及工程热物理—热能工程]