利用T型三通测量气液两相流体的流量和干度  

Measurement of Flow Rate and Dryness of a Vapor-liquid Two-phase Fluid by Using a T-junction

作　　者：王栋[1] 林益[1] 林宗虎[1] 

机构地区：[1]西安交通大学热能工程系,陕西西安710049

出　　处：《热能动力工程》2002年第4期336-338,348,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目 ( 5 9995 46 0 )

摘　　要：利用T型三通的相分离特性 ,从被测气液两相流体中分流分离出一部分单相气体 ,通过测量这部分单相气体的流量确定被测气液两相流体的流量或干度。这种方法把两相流体的流量测量转化成了单相流的测量 ,测量仪表的稳定性和可靠性能得到显著改善 ,测量精度得以大幅度提高。试验结果证实 ,分流系数与被测两相流的干度成正比。在本文实验范围内 ,流量和干度的平均测量误差小于± 5 %。Through the use of the phase separation features of a T-junction a portion of single-phase gas stream is extracted and separated from a measured gas-liquid two-phase fluid. By the measurement of this portion of the single-phase gas flow rate determined is the flow rate or dryness of the measured gas-liquid two-phase fluid. The specific feature of this method lies in the conversion of flow rate measurement of a two-phase fluid into the measurement of a single-phase fluid, resulting in a significant improvement of instrumentation stability and reliability and a remarkable enhancement of measurement precision. Test results indicate that the flow extraction ratio is directly proportional to the dryness of the measured two-phase flow. Within the test range adopted by the authors the average measurement error of flow rate and dryness is less than ±5%.

关 键 词：T型三通 测量 气液两相流 流量 干度 流量计 分流分相 

分 类 号：O359[理学—流体力学]