Combined PDA and LIF applied to size-temperature correlations measurements in a heated spray
Abstract
This paper aims to demonstrate the possibility to achieve droplet temperature measurements per droplet size class by combining two-color laser-induced fluorescence (LIF) and phase Doppler analyzer (PDA). For that purpose, PDA and LIF signal acquisitions are synchronized on the same time base. LIF signal is processed on each of the defined size classes in order to derive the droplet temperature. Since PDA is roughly sensitive to D2 and LIF roughly to D3, the detection range of the combination of the two techniques in term of droplet size is carefully analyzed. Finally, the technique is demonstrated on a spray of n-decane injected in a turbulent over-heated air flow. The influence of the droplet size and Stokes number on the heating process of the droplets is clearly highlighted.
- Publication:
-
Experiments in Fluids
- Pub Date:
- March 2011
- DOI:
- 10.1007/s00348-010-0956-3
- Bibcode:
- 2011ExFl...50..561D
- Keywords:
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- Droplet Size;
- Spectral Band;
- Droplet Diameter;
- Probe Volume;
- Fluorescence Ratio