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.
出处
《发电设备》
2008年第5期369-372,共4页
Power Equipment
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
energy and power engineering
steam turbine
exhaust wetness
double-region-heating
steam-liquid two-phase flow
water drop vaporization length
