Experiments in Fluids

, Volume 52, Issue 4, pp 843–856 | Cite as

A two-color planar LIF technique to map the temperature of droplets impinging onto a heated wall

Research Article
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Abstract

This work consists in the development of the planar extension of two-color LIF, usually working as a point-wise technique. This latter has already demonstrated its ability to characterize the temperature of droplets in various situations including droplet evaporation in combusting flows or droplet/wall interactions in the case of point-wise measurements. This technique is based on the measurement of the relative intensity detected on two adequate spectral bands of a single fluorescent tracer. It allows absolute temperature measurement when a reference at a given temperature is known. The two-color LIF system is designed for observing single drop impacts onto a hot wall with a field of view limited to a few square millimeter. In this study, the focus is placed first on the description of the technique development: the selection of a suitable tracer, its temperature calibration, the correction for the non-linearity of the response of the measurement system, and the pixel-by-pixel correspondence of the camera images. After several tests carried out on droplets in temperature-controlled conditions, the feasibility of the method is finally demonstrated in the case of droplets impinging on a heated wall for different impact regimes: rebound, splashing, and deposition of a boiling liquid film.

Keywords

Droplet Size Laser Sheet Fluorescence Ratio Heated Wall Optical Aberration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgments

This work has been supported by the French National Agency (ANR) in the frame of the research program IDHEAS (n°ANR-NT09 432160).

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.LEMTA, Nancy-Université, CNRS, 2 avenue de la Forêt de Haye BP 160Vandœuvre-lès-Nancy CedexFrance

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