CAJ | 학술논문

常用电磁流量计的电极为点状形式，广泛用于管道流体速度分布呈轴对称的单相流参数测量，当流速呈非轴对称分布时则引起测量误差。为满足两相流参数测量要求，改善点状电极结构对流速分布的敏感性，提出了采用弧状电极结构形式电磁流量计对两相流参数进行测量。采用解析计算法研究了弧状电极电磁流量计的特性：对弧状电极测量敏感场的权重函数分布进行了计算，同时为降低管道流体流速分布对测量准确性的影响，根据权重函数分布均匀性，确定了弧状电极电磁传感器的结构参数；分析了垂直上升管气液两相流典型流型时弧状电极电磁流量计的响应特性。分析结果表明，弧状电极电磁流量计的权重函数分布相比点状结构形式要均匀得多，其响应特性分析给出了两相流测量中电极之间测量电压与流体速度之间的关系，从而为弧状电极电磁流量计在气液两相流参数测量中的应用提供了理论基础。
상용전자류량계적전겁위점상형식，엄범용우관도류체속도분포정축대칭적단상류삼수측량，당류속정비축대칭분포시칙인기측량오차。위만족량상류삼수측량요구，개선점상전겁결구대류속분포적민감성，제출료채용호상전겁결구형식전자류량계대량상류삼수진행측량。채용해석계산법연구료호상전겁전자류량계적특성：대호상전겁측량민감장적권중함수분포진행료계산，동시위강저관도류체류속분포대측량준학성적영향，근거권중함수분포균균성，학정료호상전겁전자전감기적결구삼수；분석료수직상승관기액량상류전형류형시호상전겁전자류량계적향응특성。분석결과표명，호상전겁전자류량계적권중함수분포상비점상결구형식요균균득다，기향응특성분석급출료량상류측량중전겁지간측량전압여류체속도지간적관계，종이위호상전겁전자류량계재기액량상류삼수측량중적응용제공료이론기출。
An electromagnetic flowmeter with concave-shaped electrodes was proposed and its characteristics were investigated based on different analytical methods. Weight function distribution of relevant sensitivity fields was first calculated. Moreover, in order to reduce the effect of flow distribution on the measurement, the electromagnetic flow sensor was then optimized according to weight function uniformity. Response characteristics of the electromagnetic flowmeter were calculated for typical gas-liquid two-phase flow patterns in a vertical upward pipe. The results show that weight function distribution of the electromagnetic flowmeter with concave-shaped electrodes is more uniform than that with point-shaped electrodes and the relationship between the measured voltage and flow velocity is also obtained. This research provides theoretical insights for further study of two-phase flow measurements with electromagnetic flowmeters.