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These tests were similar to those recorded in College of Aeronautics Note No.
95(2) by A. G. Smith, A. R. C. S. , B. Sc. , D. I. C. , and J. P. H. Webber, to which
the reader is referred.
This reo
port gives experimental data for the pressure drop in "Velflo" pipe
bends of 90 bend and one diameter throat radius. The bends were of 3" - 9"
nominal diameter and the range was covered in steps of 1". Pressure drop data
are provided in the form of pressure drop in the bends against nominal mean velocity
for air of density 0.0763 lb/cu. ft. By "nominal mean velocity" is meant the mean
velocity which would occur in a pipe of bore equal to the nominal for a given flow rate,
and by "pressure drop" is meant the additional drop in pressure which occurs when
a bend is inserted between two straight lengths. Both the bends and the pipes tested
varied slightly in bore from the nominal diameter. Also given in the report is the
non-dimensional form of the data, (useful in assessing consistency between the
different tests) and the form of pressure drop against volume flow rate. This latter
form is probably the most directly useful to customers of Wilmot Breeden Ltd. |
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