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【目的】随着工业化快速发展，煤炭等化石燃料造成了严重的环境污染。烟气作为工业生产过程的主要大气污染物，其排放量对环境污染的影响尤为显著。因此，准确测量烟气流量成为控制污染、优化能源利用的关键举措。阵列式测量系统作为一种新型的高精度流量测量技术，已逐渐成为主流方式。【方法】本文通过计算流体力学软件构建环形低速风洞的数学模型，探讨测量平台流场稳定性与测量设备皮托管结构设计（安装角度、测孔斜度、流量等关键参数）对阵列式测量系统单点测量精度的影响规律。【结果】研究结果表明：（1）环形低速风洞在不同的流量下具有良好的流场稳定性；（2）皮托管结构设计中，垂直安装测量方式比偏移30°安装测量的效果要好，相对标准误差由8.67%降至3.87%;(3)皮托管测量精度随着测孔斜度的增加而增大，而第一工作段中保持在30°时的测量相对误差最小，仅为2.16%，但具体测孔斜度还应根据实际情况决定；（4）测量相对标准误差与测量平台入口流量成正线性关系，因此在相同测量条件下，还需考虑测量介质的流量范围。【结论】该研究成果有望对阵列式测量系统在烟气流量测量领域发挥更大的作用，提高烟气排放量的精准监测把控，大力推动“双碳”目标下工业智能化和火电绿色化的发展。
Abstract：[Objective]With the rapid development of industrialization, coal and other fossil fuels have caused serious environmental pollution. As the main emission of industrial production process, the emission of flue gas has a particularly good impact on environmental pollution. Therefore, the accurate measurement of flue gas flow becomes the key link to control pollution and optimize energy utilization. As a new high precision flow measurement technology, array measurement system has gradually become the mainstream way.[Methods]The purpose of this study is to build the mathematical model of the annular low-speed wind tunnel by CFD numerical simulation software, and to explore the influence of key parameters such as the stability of the flow field of the measuring platform and the design of the pitot tube structure of the measuring equipment-installation angle, measuring hole inclination, flow rate on the single point measurement accuracy of the array measurement system. [Results]The results showed that:(1) annular lowspeed wind tunnel had good flow field stability under different flow rates.(2) In the design of pitot tube structure, the measurement method of vertical installation was better than the measurement in the direction of offset 30°, and the relative standard error is reduced from 8.67% to 3.87%.(3) The measuring accuracy of the pitot tube increased with the increase of the inclination of the measuring hole, and the relative error of the measurement when it was maintained at 30° in the first working section was the smallest, only 2.16%, but the specific inclination of the measuring hole should be determined according to the actual situation.(4) The relative standard error of measurement was linearly related to the flow at the entrance of the measurement platform, so the flow range of the measuring medium should also be considered under the same measurement conditions. [Conclusion]The research results were expected to play a greater role for the array measurement system in the field of flue gas flow measurement, improved the accurate monitoring and control of flue gas emissions, and vigorously promoted the development of industrial intelligence and thermal green under the goal of the carbon peaking and carbon neutrality.
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基本信息:
DOI：10.19944/j.eptep.1674-8069.2026.01.003
中图分类号:X831
引用信息:
[1]冒文莉,江健,王晓佳.基于阵列式烟气流量测量系统单点测量精度的数值模拟研究[J].电力科技与环保,2026,42(01):25-33.DOI:10.19944/j.eptep.1674-8069.2026.01.003.
基金信息:
国家重点研发计划项目（2020YFC1910000）; 阵列（网格）式流量测试数字化模拟开发项目（H202310555）