New Pressure Sensitive Paints (PSPs) for mapping pressure distributions on surfaces of building models under turbulent flow conditions in a wind tunnel
Authors:
- Maciej Pilch,
- Łukasz Flaga,
- Renata Kłaput,
- Dawid Kiesiewicz,
- Joanna Ortyl,
- Roman Popielarz,
- Andrzej Flaga
Abstract
A new Pressure Sensitive Paint (PSP) has been developed to map pressure distribution on surfaces of building models during aerodynamic tests in wind tunnel. The PSP consists of 2-hydroxyethyl acrylate (HEA) hydrogel matrix and ethyl eosin (EE) as a fluorescent pressure sensor. First, the spectroscopic properties and photostability of the PSP were investigated. The maximum coating thickness was determined to be 3 mm. The PSP system was studied in the Constant-Thickness-Mode (CTM) and Variable-Thickness-Mode (VTM). It was found that fluorescence intensity of the PSP decreased with increasing pressure. Under CTM conditions, the EE-based PSP system behaved like a classic Solvent-Quenched Pressure Sensitive Paint (SQ-PSP). Its sensitivity to changes of pressure was about 35 %/bar, which is comparable to the sensitivity of SQ-PSPs based on europium complexes and sensitivity of Oxygen Quenched Pressure Sensitive Paints (OQ-PSP). However, under VTM conditions, the sensitivity of the PSP studied turned out to be about 50 times higher than that in CTM mode, due to simultaneous solvent quenching of EE sensor and change of the paint thickness upon pressure, while the effect of thickness change on fluorescence intensity was dominating. Next, pressure distribution on the side wall surface of a building model at different angles of inclination to the wind direction was mapped using classic pressure taps (as a reference) and the new PSP system in VTM mode. It has been found that the pressure maps obtained using the new PSP system are consistent with those obtained using pressure taps in the overpressure area, but show some differences in the under-pressure area, which confirms that the new PSP system can be used for aerodynamic tests under certain conditions.
- Record ID
- CUTeba3e20cdd5f4dacb173d74a7aef518d
- Publication categories
- ;
- Author
- Journal series
- Polymer, ISSN 0032-3861, e-ISSN 1873-2291
- Issue year
- 2024
- Vol
- 290
- Pages
- [1-14]
- Article number
- 126551
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 13-14; Bibliografia (liczba pozycji) - 42; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 290
- Substantive notes
- Supplementary data can be found online at https://doi. org/10.1016/j.polymer.2023.126551
- Keywords in English
- pressure sensitive paints, pressure mapping, aerodynamic measurements, wind tunnel, ethyl eosin, fluorescent sensors
- ASJC Classification
- ;
- DOI
- DOI:10.1016/j.polymer.2023.126551 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0032386123008819 Opening in a new tab
- Related project
- Droga do Doskonałości - kompleksowy program wsparcia uczelni. . Project leader at PK: , ,
- Projektowanie, otrzymywanie oraz badanie właściwości aplikacyjnych nowego typu powłok PSP i TSP w ramach konstrukcji innowacyjnych systemów do mapowania rozkładu termodynamicznych parametrów stanu na powierzchniach obiektów rzeczywistych, na potrzeby przemysłu wysokich technologii. . Project leader at PK: , ,
- Droga do Doskonałości - kompleksowy program wsparcia uczelni. . Project leader at PK: , ,
- Language
- eng (en) English
- License
- Score (nominal)
- 100
- Score source
- journalList
- Score
- Publication indicators
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTeba3e20cdd5f4dacb173d74a7aef518d/
- URN
urn:pkr-prod:CUTeba3e20cdd5f4dacb173d74a7aef518d
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.