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Pressure-Sensitive Paint for Detection of Boundary Layer Transition

Balla, Joseph V.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1345552359

Abstract Details

2012, Master of Science, Ohio State University, Aero/Astro Engineering.
A polymer/ceramic pressure-sensitive paint (PSP) system was evaluated to detect the laminar -turbulent transition location. A preliminary investigation was completed at the Wright-Patterson Air Force Base Trisonic Gasdynamics facility on a flat plate designed specifically for this test. Reynolds number (3.6 — 8.9x106 /m) and Mach number (0.4 — 0.8) sweeps were completed for various angles of attack (-2° — -8°). PSP results were obtained using either a biluminophore or platinum porphyrin (PtTFPP) on a polymer/ceramic basecoat. Pressure fluctuation levels measured by Kulite pressure transducers were ~ 400 Pa for a frequency bandwidth of 0 – 50 kHz. Significant power was seen in the sub-10 kHz range, but any variation in fluctuations due to Mach or Reynolds number was seen in the 25—50 kHz range. Due to low signal levels the PSP response was recorded at <3 kHz. Due to the nature of the closed-loop tunnel, the model had reached thermal equilibrium prior to images being recorded, and the transition location could not be evaluated using the temperature channel of the biluminophore PSP. The laminar-turbulent transition location was detected using PC-PtTFPP PSP on a NASA HSNLF(1)-0213 airfoil at Mach 0.28 free-stream, chord Reynolds number of 1.8 million, and -6° angle of attack in the OSU 6” x 22” transonic wind tunnel. Thermal imaging was used for verification of the laminar-turbulent transition location. After evaluation of the PSP results and comparison with Kulite results, it was concluded that the PSP was not sensitive enough to pressure to detect transition using the surface pressure fluctuations, and that the laminar-turbulent transition location was seen by the PSP as a result of its temperature sensitivity.
James Gregory (Advisor)
Jeffrey Bons (Committee Member)
155 p.
Aerospace Engineering
Pressure-sensitive paint; boundary-layer; transition

Recommended Citations

Citations

  • Balla, J. V. (2012). Pressure-Sensitive Paint for Detection of Boundary Layer Transition [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345552359

    APA Style (7th edition)

  • Balla, Joseph. Pressure-Sensitive Paint for Detection of Boundary Layer Transition. 2012. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1345552359.

    MLA Style (8th edition)

  • Balla, Joseph. "Pressure-Sensitive Paint for Detection of Boundary Layer Transition." Master's thesis, Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345552359

    Chicago Manual of Style (17th edition)

osu1345552359
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© 2012, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.