Some Fundamental Natures of Resonant Surge : (2nd Report, Theoretical Analysis)

抄録

The oscillation cycles of the fan duct systems with nonlinear forcing have been determined by phase plane integrations utilizing the equivalent lumped models obtained in the first report. It has been assumed that the instantaneous characteristics of the fan is the same as its static ones. Experimental and theoretical results have been found to agree well with each other. Although the fan duct systems chosen were simple ones and the fan pressure rise was only a few inches of water, it seems likely that the fundamental natures of surge have been clarified.