(p0 − p2) Ω − R = 0;
| ∴ R = GΩ ( | Ω | − 1 ) | 2 | v2 | ; | |
| cc (Ω − ω) | 2g |
(4)
an expression like that for the pressure of an isolated jet on an indefinitely extended plane, with the addition of the term in brackets, which depends only on the areas of the stream and the plane. For a given plane the expression in brackets diminishes as Ω increases. If Ω/ω = ρ, the equation (4) becomes
| R = Gω | v2 | { ρ ( | ρ | − 1 ) | 2 | }, |
| 2g | cc (ρ − 1) |
(4a)
which is of the form
R = Gω (v2/2g) K,
where K depends only on the ratio of the sections of the stream and plane.
For example, let cc = 0.85, a value which is probable, if we allow that the sides of the pipe act as internal borders to an orifice. Then