Experimental Technique for Minimizing Resonance within a Ducted Fluid

Abstract

Presented is an experimental method that enables practical pipe systems to be de-tuned so that resonance can be reduced to an absolute minimum. The technique employed is to correlate pseudorandom binary sequence pressure disturbances which are deliberately introduced into the pipe system. It is believed that this is the only method yet available to achieve this minimization of resonance phenomena. The experiment does not require fragile equipment and can be used in two phase flow work. The procedure is unsophisticated and directly applicable to engineering systems requiring this adjustment. The rapid response of the measuring technique makes the approach suitable for automatic control applications. Further extensions of this technique that give a greater insight into the practical behaviour of sonic waves are highlighted in the paper.