有向单位系下的方程无量纲化法

DERIVATION OF DIMNESIONLESS EQUATIONS FROM METHOD OF ANALYSIS OF DIRECTIONAL UNIT SYSTEM

本文所研讨以有向单位系使方程无量纲化的方法。将籍助若干实例使探讨深入化和具体化。方法本身具有普遍性,但非任何场合都能比不考究方向的单位系取得更好的效果。

In this paper the dimensionless equations are derived from the method of analysis of directional unit system ,and two examples are presented in illustration . The important priciple is suggested that the choice and treatment of the unit system in the similarity theory is quite differ from those of public unit systems such as SI system or engineering unit system, even though all they must conform to the Gauss' s rule of selection of unit system. For the former the flexibility and the particularity is necessary, because in the similarity theory the particular and actually phenomenon is investigated, and for the latter the invariance and the universality is necessary .as it is based on possibility of occurrance of all phenomena.