Development and application of luminescent coatings for the measurement of pressure and strain

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Date
2019
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Publisher
University of Alabama Libraries
Abstract

The development of improved imaging devices has continued to expand the application of more accurate and robust full-field optical measurement techniques in the areas of mechanics and aerodynamics. Two such full-field techniques are PEC and PSP. For PEC measurements, the newer technology of micro-polarizer lens reduces the steps necessary to extract polarization data, hence allowing for faster and dynamic measurements. Similarly, improvements in camera sensors and high-powered lamps have furthered the capabilities of PSPs, particularly Fast-PSP. A method using dynamic PEC measurements in conjunction with PSP capabilities would be applicable to many fluid-structure interaction testing scenarios by quantifying the relation between changes in pressure field to changes in structural loading. The feasibility of this combined measurement technique, or PSC, is explored including developing bench-top apparatus to measure isolated PEC and PSP response as well as quantifying the capabilities and limitations of the combined full-field coating. Both PEC and PSP were successfully tested. Initial tests of PSC show both pressure and strain response under light-limited conditions, although further experimentation with coating combinations needs to be completed before dynamic measurements are explored and refined.

Description
Electronic Thesis or Dissertation
Keywords
Aerospace engineering, Optics, Fluid mechanics
Citation