Periodic Fluid Flow Through Circular Orifices

Abstract

The results of an experimental investigation of both the linear and nonlinear analogous acoustic resistance and inductance of circular orifices with water and 10 centistoke Dow Corning Silicone fluid are presented. Experimental determinations of the end corrections for resistance and inductance are in good agreement with the classical end correction as given by Rayleigh for inductance. A series of determinations of the criterion for the onset of nonlinearity in resistance and inductance, together with photographs of the fluid flow patterns developed, are presented. A characteristic of one of the fluid flow patterns is correlated with the onset of nonlinearity.