摘要
在一套透明冷态玻璃实验装置上利用粒子图像测速技术(PIV)对竖直下降管内生物质半焦颗粒的运动规律进行研究.实验在自由端和抽气两种工况下进行,结果表明,在h≥750mm时,管道内的生物质半焦的速度比较稳定.自由端时,轴向速度沿着径向呈类似抛物线分布;抽气时,颗粒的速度在轴向X=10~50mm范围内,稳定在1.2m/s左右.利用数值计算方法对管道内颗粒的速度分布进行模拟,在抽气状态下,对h=750mm,h=1 050mm这两个截面实验和模拟结果进行的对比表明,模拟结果在数值量级以及变化趋势方面与实验结果吻合度较好,能够起到较好的预测作用.
The movement of biomass semi-char particles was studied in a vertical down glass pipe using the particle image velocimetry(PIV)techniques.Experiments were carried out under the conditions of the bottom end is open and the bottom end is connected to a suction pump.The velocities of semi-char particles are relatively stable when the falling distance h≥750mm.The axial distribution is a parabola-like curve along the cross-sections of pipe when the bottom end is open while it is stable at about 1.2m/s at X=10~50mm when the bottom end is connected to a suction pump.The numerical simulation of the velocity distribution of semi-char particles was also conducted and the simulation results were then compared with the experiment results when the falling distance h = 750 mm and 1 050 mm.The simulation results on numerical magnitude and trends matched well with the experimental results,which could achieve a better prediction.
出处
《山东理工大学学报（自然科学版）》
CAS
2015年第6期6-10,共5页
Journal of Shandong University of Technology:Natural Science Edition
基金
863计划项目(2012AA101800)
国家自然科学基金资助项目(50876056
51276103)
山东省自然科学基资助金项目(ZR2011EL041)
关键词
生物质半焦
两相流
PIV
速度场
数值模拟
semi-coke particles
two-phase flow
PIV
velocity field
numerical simulation
