Data underlying the research of laminar-turbulent transition in single-phase and particle-laden pipe flow

This data set contains laminar-turbulent transition curves of single-phase and particle-laden pipe flow experiments performed at Delft University of Technology, as part of the ERC Consolidator Grant No. 725183 “OpaqueFlows.”The purpose of these experiments was to investigate the onset of turbulence in particle-laden pipe flows. To this end, the particle-to-pipe diameter ratio (d/D) and particle volume fraction (φ) were varied. The total data set consists of eight different files (.txt). Two files contain the single-phase transition curves (Re vs. f) obtained in the 10.00±0.01 mm and the 19.98±0.06 mm diameter pipe flow facility. The remaining files contain transition curves (Re_s vs. f) for constant d/D and increasing φ. Note that Reynolds number for the particle-laden cases is based on the suspension viscosity, determined using Eilers viscosity model. An overview of the data files is given below. Details about the experimental setups and measurement procedures can be found in the dissertation of W.J. Hogendoorn, available at: http://repository.tudelft.nl/.<br><br>

本数据集包含代尔夫特理工大学（Delft University of Technology）开展的单相与含颗粒管流实验的层流-湍流转捩曲线（laminar-turbulent transition curves），该实验作为欧洲研究理事会（European Research Council, ERC）整合型资助项目No.725183"OpaqueFlows"的组成部分实施。<br>本实验的研究目的为探究含颗粒管流中的湍流起始特性。为此，实验中调控了颗粒-管径比（particle-to-pipe diameter ratio, d/D）与颗粒体积分数（particle volume fraction, φ）两个参数。<br><br>完整数据集共包含8个不同的文本（.txt）文件。其中2个文件对应单相流转捩曲线（雷诺数Re vs. 摩擦系数f），分别在管径为10.00±0.01 mm与19.98±0.06 mm的管流实验装置中测得。<br>剩余6个文件则对应固定颗粒-管径比、且颗粒体积分数逐步递增的含颗粒流转捩曲线（悬浮液雷诺数Re_s vs. 摩擦系数f）。需注意：含颗粒工况下的雷诺数基于悬浮液黏度（suspension viscosity）计算，该黏度通过艾勒斯黏度模型（Eilers viscosity model）确定。<br><br>下文将对各数据文件进行概述。实验装置与测量流程的详细信息可参阅W.J. Hogendoorn的学位论文（dissertation），该论文可通过代尔夫特理工大学知识库（http://repository.tudelft.nl/）获取。<br><br>