The Resistance of Spheres in Wind Tunnels and In Air (1924)
NASA Technical Reports Server (NTRS) · leaf 5
verage turbulence character- istics. The curve of resistance coefficient (CW against Reynolds number (E) has no very unusual characteristics except that it has two points of inflection close to the minimum value of CD- The minimum value is a little higher than average. The tests made in natural… … tests, and it is an average of the results obtained with a smooth.sphere in the air stream when as free from turbulence as possible. The CD curve shows a very sharp transition from one flow regime to another at the extraordinarily high Reynolds number 3.0 X 105 and its slope from the minimum point…
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