Investigation of pressure and temperature sensitivities of a pressure sensitive paint
By: Peter D. Baumann
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1998
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 84
Description: In the development of a surface pressure measurement system for transonic compressor rotors, it has been      shown that Pressure Sensitive Paint (PSP) is also temperature dependent. In the present study, the sensitivities      to pressure and temperature were examined experimentally using an electronically- gated, intensified Charged-      Coupled-Device (CCD) video camera, frame-grabber software and an eight-inch diameter calibration chamber.      Using a signal generator, in a procedure that matched the requirements of the rotor application, multiple      low-intensity-level camera exposures were integrated and captured to produce a single usable image. Ten      captured images were averaged to increase the image's signal-to-noise ratio and the result was used to produce      an image ratio with respect to a static (ambient pressure/temperature) reference condition. Calibration tests of      constant temperature/variable pressure and constant pressure/variable temperature were completed. The results      were then compared with data obtained using the same paint and an automated, single- exposure calibration      procedure at NASA Ames Research Center. It was shown that the calibration data could be used to derive the      static pressure field produced over a high-speed test rotor using PSP and the same image-capture system used      in the calibration. In preparation for a bench test of the procedure, a uniform- stress, high-speed test rotor disk,      fitted with a shock generator was driven at speeds in excess of 30,000 RPM. Recommendations are made      toward the goal of obtaining quantitative pressure measurements on transonic compressor rotors.
Notes: "September 1998."

Thesis advisor(s): Raymond P. Shreeve.

Thesis (M.S. in Aeronautical Engineering) Naval Postgraduate School, September 1998.

Includes bibliographical references (p. 79-81).

"Approved for public release, distribution unlimited"--Cover.

Also avaliable online.

Mode of access: World Wide Web.

System Requirements: Adobe Acrobat reader.

US Navy (USN) author.

dk/dk cc:9116 12/3/98.