气水二相流相关参数检测实验及研究

发布时间：2018-06-25 22:42

  本文选题：气水二相流 + 电容传感器　； 参考：《华北电力大学(北京)》2016年硕士论文

【摘要】：随着工业领域的不断进步和发展,气液二相流在石油、动力、化工、冶金等领域的应用越来越广泛,从而也得到越来越多的学者和研究人员的普遍重视。为了推动工业相关领域的发展,气液二相流动机理的研究以及过程参数的检测显得尤为重要。本文针对油田注气锅炉领域中的气液二相流,以气水二相流为实验流体,对其流动过程中空隙率、流速两参数的测量方法进行了理论研究,以电容法和互相关技术为基础建立了空隙率和流速的测量原理。同时文章分析了电容式传感器的三个精度影响因素,并针对各精度影响因素给出了解决方案。检测系统中以4组平行板电容传感器为敏感元件、以射流泵为气液混合器、以差分采样电路改进后的电容／电压转换电路为采样电路,组成了气水二相流相关参数检测系统。最后文章采用自行设计的气水二相流空隙率测量静态实验装置,分别在环境温度为20℃、40℃、60℃下进行了空隙率测量静态实验,得出了较为理想的实验结果。本文采用Matlab对静态实验结果进行处理,拟合出各电容差值与截面含液率关系曲线,并对拟合曲线进行分析,对比了三个环境温度下的实验结果,证明了气水二相流空隙率测量过程中增加温度补偿环节的必要性。通过对静态实验结果的处理与分析,最终证明了文中所采用的电容传感器各精度影响因素解决方案是有效的,且采用平行板电容传感器测量气水二相流相关参数的方法是准确、可行的。
[Abstract]:With the continuous progress and development of industry, gas-liquid two-phase flow has been widely used in petroleum, power, chemical, metallurgy and other fields, which has been paid more and more attention by scholars and researchers. In order to promote the development of industrial related fields, the study of gas-liquid two-phase flow mechanism and the detection of process parameters are particularly important. Aiming at the gas-liquid two-phase flow in the field of gas injection boiler in oil field, this paper takes gas-water two-phase flow as experimental fluid, and makes a theoretical study on the measurement method of two parameters of porosity and velocity in the flow process. Based on capacitance method and cross correlation technique, the measurement principle of voidage and velocity is established. At the same time, three factors affecting the accuracy of capacitive sensor are analyzed, and the solutions are given. In the detection system, four groups of parallel plate capacitive sensors are used as sensitive elements, jet pump is used as gas-liquid mixer, and the capacitance / voltage conversion circuit of differential sampling circuit is used as sampling circuit. Finally, the static experiment of voidage measurement for air-water two-phase flow is carried out at 20 鈩，

本文编号：2067829