Hydrodynamic Study of Pneumatic Grain Separation (III)

Representation for ever lasted behind Stream in Air Turbulent Flow Path

Abstract

When the grain is dropping in an air turbulent flow path at separation point, the author studied the representation of grain stream.
In order to decide the wind velocity of neighbourhood of grain at the minimum stream section, the representative function was decided by S. C. Transformation about two grains—one was on the datum line and the other flowed down formerly and was the constant position away from one. The projection was decided to make a real plane and the parameter plane according to a conformal representation, and the closed polygon in conformity with a force line shaft was made. Then the displacement on a real plane was calculated by the theorem of a regular function and method of S. C. Transformation, since then divided the real part and the imaginary part.
As the result, the stream force line was granted that grains were threw in the pneumatic grain separation path with winnower to separate, it was decided that the extension of turbulent flow did not ended in stronger, and the equi-potential flow line was similar also.