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Pressure-sensitive paint measurements of transient shock phenomena.

Quinn MK, Kontis K - Sensors (Basel) (2013)

Bottom Line: Illumination comes from two high-intensity broadband Xenon arc light sources with short-pass filters.The sample is imaged at 100 kHz using a Vision Research Phantom V710 in conjunction with a pair of long and short pass filters, creating a band.The PSP results are compared with numerical simulations of the flow using the commercial CFD package Fluent as part of ANSYS 13 for two Mach numbers.

View Article: PubMed Central - PubMed

Affiliation: Aero-Physics Laboratory, University of Manchester, Manchester, UK. mark.quinn-2@postgrad.manchester.ac.uk

ABSTRACT
Measurements of the global pressure field created by shock wave diffraction have been captured optically using a porous pressure-sensitive paint. The pressure field created by a diffracting shock wave shows large increases and decreases in pressure and can be reasonably accurately captured using CFD. The substrate, a thin-layer chromatography (TLC) plate, has been dipped in a luminophore solution. TLC plates are readily available and easy to prepare. Illumination comes from two high-intensity broadband Xenon arc light sources with short-pass filters. The sample is imaged at 100 kHz using a Vision Research Phantom V710 in conjunction with a pair of long and short pass filters, creating a band. The PSP results are compared with numerical simulations of the flow using the commercial CFD package Fluent as part of ANSYS 13 for two Mach numbers.

No MeSH data available.


Related in: MedlinePlus

CFD pressure map of Mi = 1.55 shock diffraction process. (a) 20 μs; (b) 40 μs; (c) 60 μs; (d) 80 μs; (e) 100 μs; (f) 120 μs; (g) 140 μs; (h) 160 μs; (i) 180 μs; (j) 200 μs; (k) 220 μs; (l) 240 μs.
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f15-sensors-13-04404: CFD pressure map of Mi = 1.55 shock diffraction process. (a) 20 μs; (b) 40 μs; (c) 60 μs; (d) 80 μs; (e) 100 μs; (f) 120 μs; (g) 140 μs; (h) 160 μs; (i) 180 μs; (j) 200 μs; (k) 220 μs; (l) 240 μs.

Mentions: The numerical simulations of a Mi = 1.55 shock diffracting around a sharp corner are presented in Figure 15. The same flow features seen in the previous case are well represented, with the noticeable inclusion of the embedded shock wave between the shear layer and the vortex core, which can be faintly distinguished from Figure 15(c) onwards. The predicted pressure in the vortex core is significantly lower than the experimental results at 0.12 bar.


Pressure-sensitive paint measurements of transient shock phenomena.

Quinn MK, Kontis K - Sensors (Basel) (2013)

CFD pressure map of Mi = 1.55 shock diffraction process. (a) 20 μs; (b) 40 μs; (c) 60 μs; (d) 80 μs; (e) 100 μs; (f) 120 μs; (g) 140 μs; (h) 160 μs; (i) 180 μs; (j) 200 μs; (k) 220 μs; (l) 240 μs.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3673091&req=5

f15-sensors-13-04404: CFD pressure map of Mi = 1.55 shock diffraction process. (a) 20 μs; (b) 40 μs; (c) 60 μs; (d) 80 μs; (e) 100 μs; (f) 120 μs; (g) 140 μs; (h) 160 μs; (i) 180 μs; (j) 200 μs; (k) 220 μs; (l) 240 μs.
Mentions: The numerical simulations of a Mi = 1.55 shock diffracting around a sharp corner are presented in Figure 15. The same flow features seen in the previous case are well represented, with the noticeable inclusion of the embedded shock wave between the shear layer and the vortex core, which can be faintly distinguished from Figure 15(c) onwards. The predicted pressure in the vortex core is significantly lower than the experimental results at 0.12 bar.

Bottom Line: Illumination comes from two high-intensity broadband Xenon arc light sources with short-pass filters.The sample is imaged at 100 kHz using a Vision Research Phantom V710 in conjunction with a pair of long and short pass filters, creating a band.The PSP results are compared with numerical simulations of the flow using the commercial CFD package Fluent as part of ANSYS 13 for two Mach numbers.

View Article: PubMed Central - PubMed

Affiliation: Aero-Physics Laboratory, University of Manchester, Manchester, UK. mark.quinn-2@postgrad.manchester.ac.uk

ABSTRACT
Measurements of the global pressure field created by shock wave diffraction have been captured optically using a porous pressure-sensitive paint. The pressure field created by a diffracting shock wave shows large increases and decreases in pressure and can be reasonably accurately captured using CFD. The substrate, a thin-layer chromatography (TLC) plate, has been dipped in a luminophore solution. TLC plates are readily available and easy to prepare. Illumination comes from two high-intensity broadband Xenon arc light sources with short-pass filters. The sample is imaged at 100 kHz using a Vision Research Phantom V710 in conjunction with a pair of long and short pass filters, creating a band. The PSP results are compared with numerical simulations of the flow using the commercial CFD package Fluent as part of ANSYS 13 for two Mach numbers.

No MeSH data available.


Related in: MedlinePlus