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Effects of particle inertia on PIV measurements of turbulent premixed flames

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.1490
11 pages

F. Battista
Dipartimento di Ingegneria Meccanica e Aerospaziale, 'Sapienza' University, Via Eudossiana 18, 00184 Roma, Italy

Francesco Picano
Department of Mechanics and Aeronautics, "Sapienza" University of Rome, Via Eudossiana 18, 00184 Rome, Italy; KTH, Department of Mechanics SE-100 44 Stockholm, Sweden; Department of Industrial Engineering University of Padova Via Venezia 1, 35131, Padova, Italy

G. Troiani
ENEA C. R. Casaccia, Via Anguillarese 301, 00123 Rome, Italy

Carlo M. Casciola
Department of Mechanics and Aeronautics, 'Sapienza' University of Rome, Via Eudossiana 18, 00184 Rome, Italy

Résumé

Particle Image Velocimetry estimates the velocity field measuring the displacement of small dispersed particles between two images separated by a small time interval. Nonetheless real particles, accounting for their finite inertia, could be unfit to respond to fast accelerations of the fluid. This effect is crucial when particles cross the flame front, leading to biased velocity estimates. Purpose of this work is to establish a criterion to select appropriate inertial particles in order to obtain accurate measurements of fluid velocity in the context of turbulent premixed combustion.

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