抄録
This paper is concerned with aerodynamic properties at suspension velocity of forage stem particles of various length, diameter and moisture.
Some general characteristics of the behavior of these various paticles in a supporting airstream were also investigated. The orientation of stem particles in the supporting airstraem is determined by the length-to-diameter ratio.
The short pieces of stem (2-3.3 in the ratio of length-to-diameter) tend to orient toward the vertical, while the long pieces (5-10 in the ratio of length-to-diameter) tend to assume a horizontal attitude.
Stem samples were observed to spin in the supporting airstream. Observation indicated that the short pieces of stem rotate round a vertical axis and the long pieces tend to a inclined or horizontal axis.
The suspension velocity of stem particles is influenced by the behavior in the airstream. The practical suspension velocity of short pieces become relatively higher than that of long pieces.
