Image Measurements of Oscillating Shock Wave by Anodized Aluminum PSP

Molton, Pascal; Bur, Reynald

doi:10.2514/6.2010-4921

Cited by 2 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, we used anodized-aluminum tapes of PSP stuck on the model surface. Subsequently, the transonic section floor was modified and an aluminum insert was placed in the middle of the profile in order to study the complete surface under the oscillating shock wave, 9 . A second application of AA-PSP has been carried out to investigate the flow field topology inside a nozzle during the transient phase and to assess the pressure gradient at the outlet region during the steady state phase, 10 .The model material is an Al-Mg alloy allowing creation of anodized aluminum layer on the whole surface of interest.…”

Section: Introductionmentioning

confidence: 99%

Transonic Buffeting Investigation using Unsteady Pressure-Sensitive Paint in a Large Wind Tunnel

Mérienne¹,

Sant²,

Lebrun³

et al. 2013

51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

Self Cite

View full text Add to dashboard Cite

Unsteady Pressure-Sensitive-Paint (PSP) measurements were conducted in a large wind tunnel used for industrial tests. For that purpose, Anodized-Aluminum PSP (AA-PSP) was used to investigate transonic buffeting effects on a civil aircraft. An aluminum alloy insert was manufactured and fitted in the model wing and prepared with AA-PSP coating. Images were acquired using a high frame rate camera up to 1000Hz. Fast data processing for image alignment and frequency analysis is performed using an in-house software which uses a graphic processor unit (GPU). The software processes images at rate of 30i/s which allows delivering the final results within a few minutes. Comparison with Kulite transducer measurements is provided, which is fairly good. A complex pressure pattern at low incidence has been revealed and is requiring further investigation. Nomenclature A(T), B(T), C(T) = temperature dependent calibration coefficientsfps = frame per second (image acquisition rate) FFT = Fast Fourier Transform I = intensity of light emitted by PSP I Ref = intensity of light emitted by PSP at reference condition M = Mach number p = surface pressure (Pa) P i0 = stagnation pressure (Pa) p Ref = surface pressure at reference condition (Pa) PSP = Pressure-Sensitive-Paint PSD = Power Spectral Density (Pa 2 /Hz) Rms = Root Mean Square S T = temperature sensitivity of the PSP (%/K) T = temperature (K) t 99 = pressure settle time (ms) α = angle of attack of the model

show abstract

Section: Introductionmentioning

confidence: 99%