当前位置: X-MOL 学术Flow Meas. Instrum. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Uncertainty analysis for multiphase flow: A case study for horizontal air-water flow experiments
Flow Measurement and Instrumentation ( IF 2.2 ) Pub Date : 2021-06-01 , DOI: 10.1016/j.flowmeasinst.2021.101972
Felipe Jaloretto da Silva , Guilherme Gonçalves da Silva , Jorge Luiz Biazussi , Marcelo Souza de Castro

This work describes the procedure used to define the measurement uncertainties of horizontal two-phase air-water flow experiments conducted to determine influences due to pipe diameter on pressure gradient on such flows. These experiments were performed with 4 different pipe diameters, always using the same test section length, therefore varying the length-to-diameter (L/D) ratio. Several parameters were measured, such as volumetric/mass flow rate, pressures, temperatures and pressure drop; other parameters were calculated, such as the superficial velocities of each fluid, as well as their corresponding properties. The main parameters studied were the flow patterns for different velocity configurations and the two-phase pressure drop to be used for model improvement, thus the importance of uncertainties analysis. The sources of uncertainty were defined, detailed, systematically studied and quantified. Also, the reproducibility capacity of the experimental setups were analysed through the uncertainty analysis and proving them to be able for future similar studies. The flow maps with their uncertainties could help understand the thresholds for each defined flow pattern region, and the plots of two-phase pressure drop variation with diameter confirmed the homogeneous model as a possible approach to calculate pressure drop if the uncertainties are considered.



中文翻译:

多相流的不确定性分析:水平空气-水流实验的案例研究

这项工作描述了用于定义水平两相空气 - 水流实验的测量不确定度的程序,以确定由于管道直径对此类流动的压力梯度的影响。这些实验使用 4 种不同的管道直径进行,始终使用相同的测试段长度,因此改变了长度与直径 (L/D) 比。测量了几个参数,例如体积/质量流量、压力、温度和压降;计算了其他参数,例如每种流体的表面速度,以及它们的相应特性。研究的主要参数是不同速度配置的流动模式和用于模型改进的两相压降,因此不确定性分析的重要性。对不确定性的来源进行了定义、详细、系统地研究和量化。此外,通过不确定性分析分析了实验装置的再现能力,并证明它们能够用于未来的类似研究。带有不确定性的流图可以帮助理解每个定义的流动模式区域的阈值,并且两相压降随直径变化的图证实了均匀模型是在考虑不确定性的情况下计算压降的可能方法。

更新日期:2021-06-22
down
wechat
bug