摘要
通过对前人有关稠密固液两相流管道絮凝过程的研究回顾与分析 ,基于管道中流体运动处于紊动状态这一事实 ,推导出了新的管道中稠密固液两相流体紊动的平均流速梯度 G(即絮凝强度 )的计算公式 ,克服了以往有关教科书存在的物理概念和数学推导方面的缺陷。利用该公式并结合试验对管道絮凝过程的最佳 GT值进行了研究 ,得出当 GT =60~ 12 0时 ,稠密固液两相流管道絮凝效果最佳。
A new formula for evaluating the mean velocity gradient G of dense liquid-particle two-phase flow in pipes was derived based on the mixing length theory of turbulent flows, which proved valid for the hyper-concentrated turbulent flow in pipes. A test study was conducted to investigate the flocculating of dense liquid-particle two-phase flow in pipes. It is found that the optimum value of mixing reaction extent is 60~120.
出处
《水动力学研究与进展(A辑)》
CSCD
北大核心
2001年第3期338-343,共6页
Chinese Journal of Hydrodynamics
基金
国家自然科学基金
水利部联合资助项目 (5 9890 2 0 0 )
关键词
稠密固液两相流
絮凝速率
试验
dense liquid-particle two-phase flow
flocculation in pipes
test study