Research Article
Speed Simulation of Pig Restarting from Stoppage in Gas Pipeline
Figure 6
Distributions of gas parameters. (a), (b), and (c) are gas density, pressure, and velocity during the time the pig was unstuck by increasing upstream pressure, respectively; (d), (e), and (f) are gas density, pressure, and velocity during the time the pig was unstuck by decreasing downstream pressure, respectively; (g), (h), and (i) are gas density, pressure, and velocity during the time the pig was unstuck by inlet pressurization together with outlet relief, respectively.
(a) |
(b) |
(c) |
(d) |
(e) |
(f) |
(g) |
(h) |
(i) |