Investigations of the transportation characteristics of biomass fuel particles in a horizontal pipeline through CFD modelling and experimental measurement
Investigations of the transportation characteristics of biomass fuel particles in a horizontal pipeline through CFD modelling and experimental measurement
复制标题
通过CFD建模和实验测量研究生物质燃料颗粒在水平管道中的输送特性
DOI：
10.1016/j.biombioe.2012.07.010
复制
发表时间：
2012
影响因子：
6
通讯作者：
Gubba S
中科院分区：
文献类型：
--
作者：
Gubba S
最近减少二氧化碳排放的国家和国际排放立法正在迫使使用煤炭的发电工业考虑各种替代品，例如生物质，特别是通过共烧技术。生物质被输送到燃烧器，或者与主要燃料（通常是煤）混合，或者在专用管道中使用。在这两种情况下，与煤炭运输相比，由于生物质的成分、尺寸、形状和物理行为，生物质的运输都很困难。本研究考虑实验测量的生物质颗粒输送管道与横向弯头，并与那些使用计算流体动力学（CFD）技术的结果进行比较。各种材料：面粉，杨柳，木材，树皮和面粉和杨柳的混合物，已被认为是在目前的调查。利用生物质颗粒静电荷的动态变化与相关信号处理技术进行了实验工作。通过考虑重力、非球形阻力（基于估计的形状因子）、颗粒分布的详细信息、颗粒壁碰撞和颗粒-颗粒相互作用的影响进行CFD模拟。良好的定量和定性的CFD模拟和实验数据之间的协议。它的结论是，颗粒-颗粒的相互作用是不太重要的，如果颗粒与空气的质量负载比小于0.03。
Recent national and international emission legislations to reduce emissions of carbon dioxide are forcing power generation industries using coal to look at various alternatives, such as biomass and especially by co-firing techniques. Biomass is transported to the burners either mixed with the primary fuel, in general, coal, or used in dedicated pipelines. In both cases, transportation of biomass is difficult due to its composition, size, shape and physical behaviour in comparison to the transportation of coal. This study considers experimental measurements for biomass particle transportation in a pipeline with a transverse elbow and compares the results with those using computation fluid dynamic (CFD) techniques. Various materials: flour, willow, wood, bark and a mixture of flour and willow, have been considered in the present investigation. The experimental work was performed using the dynamic changes in the electrostatic charges of biomass particles in conjunction with correlation signal processing techniques. The CFD simulations were performed by considering the effects of gravity, non-spherical drag (based on estimated shape factor), detailed information of the particle distribution, particle wall collisions and particle–particle interactions. Good quantitative and qualitative agreement was obtained between the CFD simulations and the experimental data. It is concluded that particle–particle interactions are of less importance if the mass loading ratio of particles to air is less than 0.03.