Pressure-sensitive paint diagnostic to measure species concentration on transpiration-cooled walls

Marc Ewenz Rocher; Tobias Hermann; Matthew McGilvray; Hassan Saad Ifti; Joao Vieira; Chris Hambidge; Mark Kenneth Quinn; Madeleine Grossman; Luc Vandeperre

doi:10.1007/s00348-021-03355-9

Pressure-sensitive paint diagnostic to measure species concentration on transpiration-cooled walls

Marc Ewenz Rocher^*, Tobias Hermann, Matthew McGilvray, Hassan Saad Ifti, Joao Vieira, Chris Hambidge, Mark Kenneth Quinn, Madeleine Grossman, Luc Vandeperre

^*Corresponding author for this work

Mechanical and Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Abstract: This paper presents the performance of pressure-sensitive paint (PSP) for the direct measurement of species concentration on a porous surface with mass injection. It is used to measure the ability of an injected gas to reduce the mass transfer of freestream species to the surface. A porous alumina sample was sprayed with a PSP luminophore solution. The sample was installed into a flat plate model and exposed to hypersonic cross-flows in the Oxford High-Density Tunnel. Tests were conducted with no coolant injection, air injection, and nitrogen injection at increasing blowing ratios. Oxygen partial pressure maps on the transpiration-cooled surface were obtained for several conditions at unit Reynolds numbers between 2.58 - 5.0 × 10 ⁷/ m and blowing ratios between 0.016 - 0.078 %. The oxygen pressure decreases as the unit Reynolds number decreases and the blowing ratio increases. Graphic abstract: [Figure not available: see fulltext.].

Original language	English
Article number	2
Journal	Experiments in Fluids
Volume	63
Issue number	1
DOIs	https://doi.org/10.1007/s00348-021-03355-9
Publication status	Published - Jan 2022

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title = "Pressure-sensitive paint diagnostic to measure species concentration on transpiration-cooled walls",

abstract = "Abstract: This paper presents the performance of pressure-sensitive paint (PSP) for the direct measurement of species concentration on a porous surface with mass injection. It is used to measure the ability of an injected gas to reduce the mass transfer of freestream species to the surface. A porous alumina sample was sprayed with a PSP luminophore solution. The sample was installed into a flat plate model and exposed to hypersonic cross-flows in the Oxford High-Density Tunnel. Tests were conducted with no coolant injection, air injection, and nitrogen injection at increasing blowing ratios. Oxygen partial pressure maps on the transpiration-cooled surface were obtained for several conditions at unit Reynolds numbers between 2.58 - 5.0 × 10 7/ m and blowing ratios between 0.016 - 0.078 %. The oxygen pressure decreases as the unit Reynolds number decreases and the blowing ratio increases. Graphic abstract: [Figure not available: see fulltext.].",

author = "{Ewenz Rocher}, Marc and Tobias Hermann and Matthew McGilvray and Ifti, {Hassan Saad} and Joao Vieira and Chris Hambidge and Quinn, {Mark Kenneth} and Madeleine Grossman and Luc Vandeperre",

note = "Funding Information: This research is funded by the EPSRC grant “Transpiration Cooling Systems for Jet Engine Turbines and Hypersonic Flight” (reference: EP/P000878/1). The authors of this paper would like to thank Greg King for his dedication and assistance in instrumenting the experimental rig, as well as Ma{\"i}lys Buquet and Ikhyun Kim for the operation of the High-Density Tunnel. The advice of Imran Naved on the use of PIRATE is gratefully acknowledged. Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2022",

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doi = "10.1007/s00348-021-03355-9",

language = "English",

volume = "63",

journal = "Experiments in Fluids",

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AU - Ewenz Rocher, Marc

AU - Hermann, Tobias

AU - McGilvray, Matthew

AU - Ifti, Hassan Saad

AU - Vieira, Joao

AU - Hambidge, Chris

AU - Quinn, Mark Kenneth

AU - Grossman, Madeleine

AU - Vandeperre, Luc

N1 - Funding Information: This research is funded by the EPSRC grant “Transpiration Cooling Systems for Jet Engine Turbines and Hypersonic Flight” (reference: EP/P000878/1). The authors of this paper would like to thank Greg King for his dedication and assistance in instrumenting the experimental rig, as well as Maïlys Buquet and Ikhyun Kim for the operation of the High-Density Tunnel. The advice of Imran Naved on the use of PIRATE is gratefully acknowledged. Publisher Copyright: © 2021, The Author(s).

PY - 2022/1

Y1 - 2022/1

N2 - Abstract: This paper presents the performance of pressure-sensitive paint (PSP) for the direct measurement of species concentration on a porous surface with mass injection. It is used to measure the ability of an injected gas to reduce the mass transfer of freestream species to the surface. A porous alumina sample was sprayed with a PSP luminophore solution. The sample was installed into a flat plate model and exposed to hypersonic cross-flows in the Oxford High-Density Tunnel. Tests were conducted with no coolant injection, air injection, and nitrogen injection at increasing blowing ratios. Oxygen partial pressure maps on the transpiration-cooled surface were obtained for several conditions at unit Reynolds numbers between 2.58 - 5.0 × 10 7/ m and blowing ratios between 0.016 - 0.078 %. The oxygen pressure decreases as the unit Reynolds number decreases and the blowing ratio increases. Graphic abstract: [Figure not available: see fulltext.].

AB - Abstract: This paper presents the performance of pressure-sensitive paint (PSP) for the direct measurement of species concentration on a porous surface with mass injection. It is used to measure the ability of an injected gas to reduce the mass transfer of freestream species to the surface. A porous alumina sample was sprayed with a PSP luminophore solution. The sample was installed into a flat plate model and exposed to hypersonic cross-flows in the Oxford High-Density Tunnel. Tests were conducted with no coolant injection, air injection, and nitrogen injection at increasing blowing ratios. Oxygen partial pressure maps on the transpiration-cooled surface were obtained for several conditions at unit Reynolds numbers between 2.58 - 5.0 × 10 7/ m and blowing ratios between 0.016 - 0.078 %. The oxygen pressure decreases as the unit Reynolds number decreases and the blowing ratio increases. Graphic abstract: [Figure not available: see fulltext.].

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Pressure-sensitive paint diagnostic to measure species concentration on transpiration-cooled walls

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