Test facility

Diagnostic techniques

Cross-flow influence

Overall boiling curves

Intermittent cooling efficiency

Heat transfer correlations


Advances in Intermittent Spray Impact Research

micro nano engineering

  Diagnostic techniques

Phase Doppler Interferometry.
The Phase Doppler diagnostic system is a 2-D DANTEC and consists in a 400mW Air-cooled Spectra Physics laser, a 55X transmitting optics, a 57x10 PDA receiving optics. The signal is processed by a 58N10 Covariance Processor (for 2-D measurements) or a BSA P80 Processor (for 1-D measurements).

Mie scattering and shadowgraphy visualization.
Flow visualization is made with two complementary techniques using a Kodak SR-Series for image capture:

1) Mie scattering of liquid droplets crossing a laser light sheet using a 9W Spectra-Physics continuous laser;
2) shadowgraphy allow discerning the liquid from vapour in the collimated projected image;
and the results given by overlapping images from these two flow visualization techniques are exemplified below