Pressure-Sensitive Paint for Detection of Boundary Layer Transition
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The Ohio State University / OhioLINK
2012
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1345552359 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu13455523592021-08-03T06:06:31Z Pressure-Sensitive Paint for Detection of Boundary Layer Transition Balla, Joseph V. Aerospace Engineering Pressure-sensitive paint boundary-layer transition 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. 2012-08-31 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1345552359 http://rave.ohiolink.edu/etdc/view?acc_num=osu1345552359 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Aerospace Engineering Pressure-sensitive paint boundary-layer transition |
| spellingShingle |
Aerospace Engineering Pressure-sensitive paint boundary-layer transition Balla, Joseph V. Pressure-Sensitive Paint for Detection of Boundary Layer Transition |
| author |
Balla, Joseph V. |
| author_facet |
Balla, Joseph V. |
| author_sort |
Balla, Joseph V. |
| title |
Pressure-Sensitive Paint for Detection of Boundary Layer Transition |
| title_short |
Pressure-Sensitive Paint for Detection of Boundary Layer Transition |
| title_full |
Pressure-Sensitive Paint for Detection of Boundary Layer Transition |
| title_fullStr |
Pressure-Sensitive Paint for Detection of Boundary Layer Transition |
| title_full_unstemmed |
Pressure-Sensitive Paint for Detection of Boundary Layer Transition |
| title_sort |
pressure-sensitive paint for detection of boundary layer transition |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2012 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1345552359 |
| work_keys_str_mv |
AT ballajosephv pressuresensitivepaintfordetectionofboundarylayertransition |
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