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Communication Dans Un Congrès Année : 2016

Comparative assessment of PIV-based pressure evaluation techniques applied to a transonic base flow

Résumé

A test case for PIV-based pressure evaluation techniques has been developed by constructing a simulated experiment from a ZDES simulation for an axisymmetric base flow at Mach 0.7. The test case comprises sequences of four subsequent particle images (representing multi-pulse data) as well as continuous time-resolved data. Particle images were processed using tomographic PIV processing as well as the PTV algorithm ‘Shake-The-Box’. Multiple pressure reconstruction techniques have subsequently been applied to the PIV results (Eulerian approach, iterative least-square pseudo-tracking, Taylor’s hypothesis approach, instantaneous Vortex-in-Cell) and PTV results (Flow Fit, Vortex-in-Cell-p lus, Voron oi-based pressure evaluation and iterative least-square pseudo-tracking). All methods were able to reconstruct the main features of the instantaneous pressure fields, including methods that reconstruct pressure from a single PIV velocity snapshot. Highly accurate pressure field reconstructions could be obtained by using PTV approaches in combination with more advanced techniques. In general, the use of longer series of time- resolved input data, when available, allows more accurate pressure field reconstruction. Noise in the input data typically reduces the accuracy of the reconstructed pressure fields, but none of the techniques proved to be critically sensitive to the amount of noise added in the present test case.
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Dates et versions

hal-01354759 , version 1 (19-08-2016)

Identifiants

  • HAL Id : hal-01354759 , version 1

Citer

Paul Blinde, Dirk Michaelis, Bas van Oudheusden, Pierre-Elie Weiss, Roland de Kat, et al.. Comparative assessment of PIV-based pressure evaluation techniques applied to a transonic base flow. 18th International Symposium on applications of laser techniques to fluid mechanics, Jul 2016, LISBONNE, Portugal. ⟨hal-01354759⟩
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