摘要
针对板厂宽吸风口在阻力计算中存在的问题进行深入的分析研究,结果发现:在圆管和矩形风口相接的过渡管中,流体从矩形风口的轴线对称形进入到扁形的过渡管中,流体是在两个互相垂直的平面内变形,即在一个平面内收缩,在另一个平面内扩散,在这种复杂的流动中反映出渐缩管与渐扩管内的气流脱离管壁的固有效应将导致增大压力损失。另外发现在传统的刨花板横截锯宽吸风口的设计中流量大、压力损失大和污染大,将固定式宽吸风口改为移动式窄吸风口后,这些问题都大大减少,其经济效益和社会效果均良好。
Aiming at the problem existing in resistance calculating of wide inlet scoop in board plant, further research was carried out. The results showed that in the transition pipe that connected circle pipe and rectangle pipe, the fluid enterd the flat transition pipe with the pattern of symmetric axis from rectangle tuyere and distorted in the two mutually perpendicular planes, shrinking in one plane, diffusing in the other. In this complicated floating, the inherent effect of airflow distracting from pipe wall in shrinking pipe and diffusing pipe was reflected, which would lead to increased pressure loss. In addition, the traditional design of wide inlet scoop of particleboard cross-cut saw resulted in large flux, big pressure loss and severe pollution, however, after turned from fixed wide inlet scoop to mobile narrow inlet scoop, the three indexes above-mentioned were improved greatly with good economic and social benefits.
出处
《森林工程》
2009年第4期45-48,93,共5页
Forest Engineering
关键词
固定式宽吸风口
移动式窄吸风口
气流脱离管壁效应
压力损失
阻力系数
fixed inlet scoop
mobile narrow inlet scoop
effect of airflow distracting from pipe wall
loss of pressure
resistance coefficient
作者简介
张士成（1955-），男，吉林榆树人，硕士生导师，教授。研究方向：木质人造板。
