Fluctuation in Pipe Flow of a Dense Suspension and Transport Parameters

利用激光多普勒测速仪(LDV)和相位多普勒颗粒分析仪(PDPA)对水平和湍流垂直管流中的颗粒速度、密度和颗粒尺寸分布进行了测量。将获得速度和密度起伏的平均值、起伏和交叉关联。结果将在两相流和颗粒-流体相互作用模型的时间平均方程的背景下解释。实验中将使用0.05 mm、0.2 mm和0.45 mm的颗粒，固体与气体的质量流量比最高可达12。这项工作对于发展对气固两相湍流的基本理解和建模是必要的，并在加工、矿产和食品工业中应用。两相流仪器的最新发展使这种测量成为可能。***

S. L. Soo Abstract measurements of particle velocities, mixture density and particle size distribution in wavy horizontal and turbulent vertical gas-solid mixture pipe flow will be performed with laser Doppler velocimetry (LDV) and phase Doppler particle analyzer (PDPA). means, fluctuations, and cross- correlations of the velocity and density fluctuations will be obtained. The results will be interpreted in the context of time averaging equations of two-phase flow and particle-fluid interaction models. Particle of 0.05, 0.2 and 0.45 mm will be used in experiments, at solids to gas mass flow ratios up to 12. The proposed work is essential for the development of basic understanding and modeling in gas-solids two-phase turbulent flow, with application in processing, minerals and food industry. The measurements are possible by recent developments in two-phase flow instrumentation. ***