|
|
Numerical Simulation Analysis and Experimental Verification of Velocity Flow Field of Large-diameter Special-Shaped Square Tube |
JIA Lu1,ZENG Yongzhong1,LIU Xiaobing1,YU Zhishun1,XIAO Wenzhuo2 |
1.Key Laboratory of Fluid and Power Machinery, Ministry of Education,Xihua University, Chengdu, Sichuan 610097, China
2. Sichuan Southwest Vocational College of Civil Aviation, Chengdu, Sichuan 610039, China |
|
|
Abstract For large-diameter irregular square pipes with a diameter exceeding 1m, where the length of the curved section is short and there are no long straight pipes before and after, and the flow field inside the pipe is complex, there is a need for accurate measurement of the pipe flow. In this regard, a numerical simulation analysis is conducted, proposing a mean velocity evaluation method based on the coefficient of variation. This method selects multiple points that best represent the average flow velocity of the pipe, determining the insertion depth of the sensors and the weight coefficients of multiple measuring points. A calculation formula is then derived, with the cross-sectional average velocity as the function and the velocity values at multiple points in the flow field as the independent variable.Flow measurement experiments are conducted on a wind tunnel test bench, and the calculated values obtained from the formula derived through numerical analysis are compared. The relative error within the full range is less than 0.54%.
|
Received: 05 July 2023
Published: 21 February 2024
|
|
|
|
|
[7] |
吴晓波, 赵梦恋, 严晓浪. 一种基于温差测量原理工作的集成型流量传感器 [J]. 传感技术学报, 2004, 17(1): 101-105.
|
[18] |
BECK S B M, MAZILLE J. A study of a pressure differential flow meter that is insensitive to inlet conditions [J]. Measurement and Instrumentation, 2002, 12: 379-384.
|
|
陈岭丽, 李岷雪. 风矢量的自动检测 [J]. 国外电子测量技术, 2005, 24(8): 22-24.
|
|
SAI Q Y, XIN X C, XU H D. Influence of Hole-taking Method on Flow Measurement Results in Combination Total Pressure Tube [J]. Acta Metrologica Sinica, 2022, 43(12): 1610-1615.
|
|
ZHANG Y S, ZHANG Y Z, LIU Y J. Research on the method of measuring pulsating flow rate with differential pressure flowmeter [J]. Acta Metrologica Sinica, 2020, 41(4): 430-433.
|
[3] |
彭杰纲, 周兆英, 叶雄英. 基于MEMS技术的微型流量传感器的研究进展 [J]. 力学进展, 2005, 35(3): 361-376.
|
[12] |
毛新业. 大管道流量仪表的研发与评估 [J]. 自动化仪表, 2021, 42(12): 1-7.
|
[13] |
赛庆毅, 辛旭超, 许浩东. 组合总压管中取孔方式对流量测量结果的影响 [J]. 计量学报, 2022, 43(12): 1610-1615.
|
[2] |
KIM S, NAM T, PARK S. Measurement of flow direction and velocity using a micro machined flow sensor [J]. Sensors and Actuators A, 2004, 114: 312-318.
|
|
MAO X Y, LI W J. Gas Flowmeter for Large Pipelines [J]. Power Equipment, 2008(12): 8-11.
|
|
WU K G. Thermal Film Air Quality Flow Sensor Based on Temperature Difference [J]. Journal of Chang'an University (Natural Science Edition), 2002, 22(5): 86-88.
|
|
WU X B, ZHAO M L, YAN X L. An Integrated Flow Sensor Working on Tomb-Mounted Temperature Difference Measurement Principle [J]. Journal of Sensors and Actuators, 2004, 17(1): 101-105.
|
|
LIU K, LIU D Y. Design and Practice of Flow Measurement System for Large Wind Ducts [J]. Automation and Instrumentation, 2010, 25(6): 52-56.
|
|
ZHANG W Y, GONG J B. Research on the velocity distribution and average velocity position of fully developed turbulent flow in a circular piper [J]. Acta Metorlogica Sinica, 1983, 4(1): 1-6.
|
|
ZHANG X Y, JI S H, DENG W, et al. Experimental Study on Ignition Characteristics of the First-stage Combustion Chamber of Plasma Burner under Primary Wind Speed and Coal Dust Concentration [J]. Boiler Technology, 2010, 41(4): 41-46.
|
[1] |
GIANI A, MAILLY F, BONOT R. Thermal model of thin film anemometer [J]. Microelectronics Journal, 2002, 33: 619-625.
|
[10] |
毛新业, 李伟建. 大管道气体流量检测仪表 [J]. 电力设备, 2008(12): 8-11.
|
[11] |
毛新业. 用均匀流场准确校验气体大流量 [J]. 仪器仪表学报, 1986(3): 312-318.
|
[14] |
刘正刚, 杜广生, 刘丽萍. 动量式气体流量计内部流场特性与测量性能研究 [J]. 计量学报, 2019, 40(1): 124-129.
|
[9] |
刘琨, 刘德宇. 大型风管道的流量测量系统设计与实践 [J]. 自动化与仪表, 2010, 25(6): 52-56.
|
|
MAO X Y. Accurate Calibration of Gas Large Flow Rate Using Uniform Flow Field [J]. Journal of Scientific Instruments, 1986(3): 312-318.
|
[17] |
张孝勇, 纪少华, 邓炜, 等. 一次风速度和煤粉浓度对等离子燃烧器一级燃烧筒点火特性的试验研究 [J]. 锅炉技术, 2010, 41(4): 41-46.
|
[5] |
吴克刚. 温差式热膜空气质量流量传感器 [J]. 长安大学学报(自然科学版), 2002, 22(5): 86-88.
|
[6] |
张昭勇, 秦明, 张中平. COMS集成二维风速和风向传感器的研制 [J]. 仪器仪表学报, 2003, 24(4): 340-343.
|
|
ZHANG Z Y, QIN M, ZHANG Z P. Development of a COMS Integrated Two-Dimensional Wind Speed and Direction Sensor [J]. Journal of Scientific Instrument, 2003, 24(4): 340-343.
|
[8] |
HUNG S T, WONG S C, Fang W. The development and application of microthermal sensors with a mesh-membrane supporting structure[J]. Sensors & Actuators A Physical, 2000, 84(1): 70-75.
|
[15] |
张维一, 龚家彪. 圆管中充分发展紊流的流速分布与平均流速位置的研究 [J]. 计量学报, 1983, 4(1): 1-6.
|
[16] |
SINGER J G. Combustion Fossil Power Systems [M]. Third edition. New York: Combustion Engineering Inc, 1981.
|
|
PENG J G, ZHOU Z Y, YE X Y. Research Progress on MEMS-Based Micro Flow Sensors [J]. Advances in Mechanics, 2005, 35(3): 361-376.
|
|
MA Q H, SHANG Z L. Design of Wind Speed Sensor Using Thermistor [J]. Sensor Technology, 2005, 24(5): 61-62.
|
|
MAO X Y. Development and Evaluation of Flowmeters for Large Pipelines [J]. Automation Instrumentation, 2021, 42(12): 1-7.
|
[19] |
张永胜, 张毅治, 刘彦军. 差压式流量计测量脉动流量方法研究 [J]. 计量学报, 2020, 41(4): 430-433.
|
|
CHEN L L, LI M X. Automatic Detection of Wind Vector [J]. Foreign Electronic Measurement Technology, 2005, 24(8): 22-24.
|
[4] |
BRUSCHI P, DILIGENTI A, NAVARRINI D, et al. A Double Integrated Gas Flow Sensor with Thermal Feedback [J]. Sensors and Actuators A, 2005, 123-124: 210-215.
|
[9] |
马庆华, 尚展垒. 采用热敏电阻器研制风速传感器的设计 [J]. 传感器技术, 2005, 24(5): 61-62.
|
|
LIU Z G, DU G S, LIU L P. Study on Internal Flow Field and Measurement Performance of Momentum Gas Flowmeter [J]. Acta Metrologica Sinica, 2019. 40(1): 124-129.
|
|
|
|