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Communication Dans Un Congrès Année : 2013

An adaptive tomographic technique to reconstruct local drop size distribution of liquid spray at multi-resolution

Résumé

This paper proposes an adaptive deconvolution algorithm to reconstruct local drop-size distributions within liquid sprays at multiple resolutions by using the laser diffraction measurement data. The algorithm employs the strip integration by which the scattered light intensities from the local regions along the measured line-of-sight being integrated and scanned over the entire region at multiple resolutions. In the strip integration model, the contribution of the intensity scattered from each local region to the measured line-of-sight data is controlled by the area of intersection between the local region and the laser beam past the region. The algorithm allows the number of input line-of-sight measurement data to be larger than the number of local regions at some selective regions where the drop-size distributions being determined. This means that the local drop-size-distributions at the selected regions can be reconstructed at higher spatial resolutions than those at other regions. The algorithm has been tested by measuring drop-size-distributions of two water sprays whose drop-size distributions are spatially nonhomogenous. The first spray is a two-dimensional like flat spray generated from an in-house designed nozzle "the single-hole triple disk nozzle" where the spray is constraint by the internal flow of the liquid before the injection. The second spray is a solid cone spray generated from a small industrial pressure swirl atomizer. It has been shown from the measurement results that the proposed algorithm is capable of reconstructing drop-size distribution of the liquid spray at multiple spatial resolutions.
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Dates et versions

hal-03989959 , version 1 (15-02-2023)

Identifiants

  • HAL Id : hal-03989959 , version 1

Citer

S. Tanchatchawan, P. Vallikul, P. Yongyingsakthavorn, Christophe Dumouchel. An adaptive tomographic technique to reconstruct local drop size distribution of liquid spray at multi-resolution. ILASS Americas, May 2013, Pittburgh, Philadelphia, USA, United States. ⟨hal-03989959⟩
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