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Jul 22

Publication update - Flow measurement

pdv result

We have recently presented some of our work in the area of flow measurement at the 17th International symposium on application of laser techniques to fluid mechanics in Lisbon. (http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2014/index.asp) .

In the paper “Frequency-division multiplexing (FDM) for interferometric referencing and multi- component measurements in Planar Doppler Velocimetry (PDV)” (http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2014/finalworks2014/papers/01.2_2_78paper.pdf) we explore the applications of high speed industrial cameras for full-field interferometry and the multiplexing of velocity channels via frequency division multiplexing. A high speed CMOS camera is used to acquire image banks of multiple amplitude modulated signals acquired simultaneously which can then be separated in post-processing. This was applied to an interferometric Doppler Global velocimetry (DGV) allowing the measurement of flow velocity over a plane defined by a laser formed into a light sheet. The application of this technique enables the much easier implementation of multiple-component interferometric DGV systems and overcomes practical issues with interferometric drift and stability.

Update: Full Journal paper – this work has now been published in a more complete form, as a peer-reviewed journal article in Applied Optics:

Frequency-division multiplexing for Interferometric Planar Doppler Velocimetry

T O H Charrett, I A Bledowski, S W. James and R P Tatam

Applied Optics (2014) Applied Optics, Vol. 53, Issue 20, pp. 4363-4374 (2014) (http://dx.doi.org/10.1364/AO.53.004363)

 

Or via CERES https://dspace.lib.cranfield.ac.uk/  (Cranfield University institutional repository).