LASER DIGITAL SPECKLE ANEMOMETRY OF FLOWSIN MICROCHANNELS OF PEM 
FUEL CELLS

N. B. Bazylev, E. I. Lavinskaya,and N. A. Fomin

UDC 535.311 + 536.24

This paper considers the method of laser digital speckle anemometry
and the software developed on its basis which make it possible to recover
up to 250,000 velocity vectors in the two-dimensional region of the flow
in a microchannel of size 20  30 mm in photography with optical magnification
 = 1. The results of the investigations confirm the high temporal and spatial 
resolution of the proposed technique and point to its possible realization
in real time. In the configuration presented the spatial resolution
in the measurement plane is about 100 m. It has been shown that experimental
noise filtering is an important part of the analysis.

A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences
of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus; email: fomin@hmti.ac.by.
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 79, No. 6, pp. 176–189,
November–December, 2006. Original article submitted February 9, 2006.