纸浆纤维悬浮液的流动和模拟

Flow and Simulation of Pulp Fiber Suspensions

纸浆纤维悬浮液流动力学可用于描述现代造纸机的流送和成形过程,为造纸过程及装备的优化设计提供理论依据.文中概述了纸浆悬浮液的特点及其模型和模拟方法,阐释了相关测量技巧,提出了将新的流场测量技巧与先进的软件相结合来研究特殊的多相流-纸浆纤维悬浮液的流动力学,重点介绍了笔者所在团队近期对纸浆悬浮液在多种模型中的流动与模拟研究以及PIV测量技术.最后阐释了这些理论研究成果在自行研制的国产高速造纸机的流浆箱和成形装置结构优化设计方面的应用.

Flow dynamics of pulp fiber suspensions can be used to describe the flow and forming processes of a modern paper machine and provide a theoretical basis for the optimization design of papermaking process and equip- ment. In this paper, the characteristics, model and simulation method of pulp fiber suspensions are introduced, and the relevant measurement techniques are expounded. Then, a flow dynamics is proposed to investigate multi- phase flow-pulp fiber suspensions by combining new measurement techniques with advanced software. Moreover, the recent theoretical research results in the field, which are achieved by the authors and their team and entitled ＂Investigation into Flow and Simulation of Pulp Fiber Suspensions in Various Models and PIV Measurement Tech- nique＂, are specially presented. Finally, this paper elaborates on the applications of the above-mentioned theoreti- cal results to the structure optimization of the head box and forming device during the process of developing a do- mestic high-speed paper machine.