刘 瑛,陈 旭,徐明刚,陈银银.低液位非满管流量校准及其测量影响因素分析[J].测控技术,2021,40(1):73-77
低液位非满管流量校准及其测量影响因素分析
Analysis on Flow Calibration and Measurement Influencing Factors of Low Liquid Level and Non-Full Pipe
  
DOI:10.19708/j.ckjs.2020.05.245
中文关键词:  非满管  流量  FLUENT  粗糙度  黏度
英文关键词:non-full pipe  flow rate  FLUENT  roughness  viscosity
基金项目:国家自然科学基金项目(51205005);北京市科技创新能力建设项目(PXM2017-014212-000013)
作者单位
刘 瑛 北方工业大学 机械与材料工程学院 
陈 旭 北方工业大学 机械与材料工程学院 
徐明刚 北方工业大学 机械与材料工程学院 
陈银银 北方工业大学 机械与材料工程学院 
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中文摘要:
      管道粗糙度和流体黏度对流量测量有一定影响,为校准流量并分析其影响因素,运用FLUENT仿真软件对管道粗糙度、流体黏度进行模拟。建立粗糙度-平均流速、黏度-平均流速模型,搭建实验平台,验证模型建立的准确性,即外置U形连通管结合高精度激光测距仪精确测量管道内流体液位高度,管道上方通气管结合流速仪精确测量管道内流体平均流速,通过体积流量计算公式得到流量值。实验结果表明,在液位低于0.1D时,流量测量误差小于0.85%;通过粗糙度-平均流速、黏度-平均流速模型得到的平均流速值进行流量计算,计算结果误差小于3.03%。实验验证了该方法的可行性和模型的可靠性,为低液位非满管流量测量领域的技术创新提供了依据和实验基础。
英文摘要:
      Pipe roughness and fluid viscosity have a certain influence on the flow measurement.In order to calibrate the flow and analyze its influencing factors,FLUENT simulation software is used to simulate different roughness and viscosity.The roughness-average flow velocity,viscosity-average flow velocity models were established,and an experimental platform was set up to verify the accuracy of the models.That is,an external U-shaped connecting pipe was combined with a high-precision laser rangefinder to accurately measure the height of the fluid level in the pipe,and the ventilation pipe above the pipe was combined with a flow velocity meter to accurately measure the average flow velocity of fluid in the pipe,and the flow value was obtained by the volumetric flow calculation formula.The experimental results show that the flow measurement error is less than 0.85% when the liquid level is lower than 0.1D.The flow rate is calculated using the average flow velocity value obtained by the roughness-average flow velocity and viscosity-average flow velocity model,and the error of the calculation result is less than 3.03%.The experiments verify the feasibility of the method and the reliability of the models.It is applicable to the low liquid level non-full pipe flow measurement,which provides a basis and experimental fundamental for technological innovation in this field.
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