ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
SPANWISE MASS TRANSFER VARIATIONS ON A CYLINDER IN "NOMINALLY" UNIFORM CROSSFLOW
要約
Mass transfer experiments on a circular cylinder
in a "nominally" uniform crossflow are described.
Experiments were conducted at the tunnel's turbulence
level and with a woven-wire turbulence
screen. In both cases spanwise and circumferential
mass transfer measurements were made. Without the
turbulence screen, the results were found to be
spanwise independent and agreed quite well with
both theory and the result of others.
In addition to the mass transfer measurements, spanwise traverse measurements of the mean velocity and turbulence quantities in the incident flow were made and showed that the screen produced a smallamplitude spanwise periodic perturbation in the incident flow. Although this perturbation was only one quarter of a percent in the mean velocity and buried in the stream's turbulence, disproportionately large spanwise variations of 15% were found in the mass transfer rate.
In addition to the mass transfer measurements, spanwise traverse measurements of the mean velocity and turbulence quantities in the incident flow were made and showed that the screen produced a smallamplitude spanwise periodic perturbation in the incident flow. Although this perturbation was only one quarter of a percent in the mean velocity and buried in the stream's turbulence, disproportionately large spanwise variations of 15% were found in the mass transfer rate.