Fluctuation in Pipe Flow of a Dense Suspension and Transport Parameters

摘要采用激光多普勒测速仪（LDV）和相位多普勒粒子分析仪（PDPA）对波浪状水平和湍流状垂直气固混合管流中的粒子速度、混合物密度和粒径分布进行了测量。将得到速度和密度波动的平均值、波动和相互关系。结果将在两相流的时间平均方程和颗粒-流体相互作用模型的背景下解释。实验将使用0.05,0.2和0.45 mm的颗粒，固体与气体的质量流量比高达12。所提出的工作对于发展气固两相湍流的基本认识和建模至关重要，在加工、矿物和食品工业中具有应用价值。两相流仪器的最新发展使测量成为可能。＊＊＊

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. ***