| Summary: | The effect of film cooling over flat plate is investigated using the commercial CD code; Fluent 6.3. The
computational domain includes the coolant supply tube as well as the main mixing region. A tube L/D of 4 and injection
angles of (30o
, 60o
, and 90o
) were employed for blowing ratio of (0.33, 0.5, and 1.67), and a density ratio of 1.14. Adiabatic
film cooling effectiveness distributions were also determined for inline and staggered arrangements. The main observation
from this study that the 30o
hole gave larger effectiveness values than 60o
and 90o
at the blowing ratio of 0.33 with the
same length-to-diameter ratio. The maximum effectiveness was achieved with a blowing ratio of 0.5. The results show that
the increase of blowing ratio negatively affects film cooling, such that for the blowing ratio of 1.67 the injected coolant
tends to lift off from the wall due to the increase of the wall normal momentum. The comparisons for numerical results
with experimental data are presented.
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