Date of Award


Publication Type

Master Thesis

Degree Name



Mechanical, Automotive, and Materials Engineering


Rankin, G.


Experiment, Fluidics, Oscillator, Supersonic




Preliminary testing shows that providing pressure pulsations during the super plastic forming process has proven to increase the total elongation of the material and is thus, likely to improve product design flexibility. A bi-stable load switched supersonic fluidic oscillator is the preferred device used to promote these pressure fluctuations during the superplastic forming process due to the absence of moving mechanical parts and resulting reliability. This thesis includes the design, construction and use of a supersonic fluidic oscillator. This apparatus can be used to validate available numerical results and identify any consistent trends over a range of operating conditions. The results of interest in this experiment are the forming pressure fluctuation amplitudes and frequencies during the filling of a chamber similar to that found in the superplastic forming process. The experimental results agree with the numerical results in trends, however, are significantly different regarding the magnitudes. Consistent trends in the relationships between dimensionless variables are shown to exist over a range of operating conditions.