Velocity imaging of highly turbulent gas flow.
We introduce a noninvasive, quantitative magnetic resonance imaging (MRI) wind-tunnel measurement in flowing gas (>10 m s(-1)) at high Reynolds numbers (Re>10(5)). The method pertains to liquids and gases, is inherently three dimensional, and extends the range of Re to which MRI is applicable by orders of magnitude. There is potential for clear time savings over traditional pointwise techniques. The mean velocity and turbulent diffusivity of gas flowing past a bluff obstruction and a wing section at realistic stall speeds were measured. The MRI data are compared with computational fluid dynamics.
Newling
Benedict
B
MRI Centre, Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton, New Brunswick NB E3B 5A3, Canada. bnewling@unb.ca
Poirier
Christopher C
CC
Zhi
Yang
Y
Rioux
James A
JA
Coristine
Andrew J
AJ
Roach
Dale
D
Balcom
Bruce J
BJ