Limits...
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

Normalised response of the PSP to two different shock waves.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3673091&req=5

f8-sensors-13-04404: Normalised response of the PSP to two different shock waves.

Mentions: Figure 8 shows the response of the PSP layer to two shock waves of different strength. This figure was generated by vertically averaging 20 pixels. The pressure rise is normalised to the value given by inviscid theory based on the experimental Mach number (normalised pressure values of 0 indicate that the shock has not yet arrived at that location). The x-axis corresponds to the distance from the left of the image to the end of the region of interest. The response is almost identical for both shock waves. The rise to a normalised value of 0.9 takes place over approximately 12 mm. The spread of the pressure rise corresponds to the distance travelled by the shock in approximately 20 μs.


Pressure-sensitive paint measurements of transient shock phenomena.

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

Normalised response of the PSP to two different shock waves.
© Copyright Policy
Related In: Results  -  Collection

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

f8-sensors-13-04404: Normalised response of the PSP to two different shock waves.
Mentions: Figure 8 shows the response of the PSP layer to two shock waves of different strength. This figure was generated by vertically averaging 20 pixels. The pressure rise is normalised to the value given by inviscid theory based on the experimental Mach number (normalised pressure values of 0 indicate that the shock has not yet arrived at that location). The x-axis corresponds to the distance from the left of the image to the end of the region of interest. The response is almost identical for both shock waves. The rise to a normalised value of 0.9 takes place over approximately 12 mm. The spread of the pressure rise corresponds to the distance travelled by the shock in approximately 20 μs.

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