某些平面复杂网路角联分支风向的判别

本文以双角联网路为例,概述了某些平面复杂网路其风向不稳定分支的风向判别的推导方法:按风压平衡和风量平衡定律,列出所有独立网孔的风压平衡方程式和节点的风量平衡方程式,然后再根椐不稳定分支中风流的三个状态列出大于零、等于零和小于零三个方程式采取一定的技巧,用消元法消去方程组中的风量Q,得出一个纯风阻的关系式来。这个关系式就是所要求的判别式。并指出,在消元过程中,不能忽视正负根的问题,否则,所得出的判别式将是不完整的。文章纠正了以往在这方面所存在的问题。进一步完善了双角联复杂网路不稳定分支的风向判别式。

THE JUDGEMENT OF AIRFLOW DIRECTION OF DIAGONAL BRANCHES IN SOME PLANE COMPLEX NETWORKS

This paper takes the network of two diagonal branches as an example and outlines a deductive method of directional discriminants of airflow in diagonal branches in some simple complex networks: According to the the balance law of air pressure and auantity, air pressure balance equation of all separate meshes and air quantity balance equations of all nodes are induced. Then three equations which are one>0, one=0, one<0, are induced according to three cases of airflow in diagonal branch. After air quantity Q in the equations is eliminated with elimination through a certain way, a relationship of pure air resistance is obtained which is the discriminant required. The paper also points out the positive and negative root cannot be ignored during elimination. Otherwise the discriminant obtained will not be complete. It revise mistake in this respect in the pass tim[1] and further completes directional discriminants of airflow in diagonal branches in the network of two diagonal branches.