Another apparatus operating on the same principle as the foregoing
Another apparatus operating on the same principle as the foregoing. It is termed a steam siphon pump (Lansdell’s patent). A is the jet-pipe; B, B, are two suction-pipes, having a forked connection with the discharge-pipe, C. The steam jet-pipe entering at the fork offers no obstacle to the upward passage of the water, which moves upward in an unbroken current.
Only the input is driven; every other part of this model moves by physics (MuJoCo), and its ratios are measured. Run it live, change its parameters, or switch the friction off to see the output stop.
- Modelled as
- In section, as Brown, gravity on. An inverted Y: two suction legs (B) from the bilge tank join in a fork under the discharge pipe C, and the air pipe A comes up behind the right leg to a nozzle in the fork pointing up C. Lumped vessels model with the jet-pump primitive (openspec add-jet-pump: the throat's pressure rise mn (vn - vm) / A from the nozzle's momentum). The cock on A is the only input (opened once by hand and held): the jet carries the air out of C, the legs fall below the air's pressure and the bilge water rises up both legs and runs from the spout into the tub.
- Measured
- Nothing runs while the cock is shut; opened, the legs fall to about -2.9 kPa and both legs lift 1.04 kg/s each, the spout running steadily at 2.08 kg/s (tests/test_jet_pump.py, mass conserved). The motion gate passes; one WARN: 21% of on-screen motion is not near a simulated part (the drawn streams).
- Notes
- Grade B. Compressed air stands in for steam, as Brown allows for No. 475 (no condensation). The fork's arms are straight segments rather than Brown's smooth curves.
Film (MP4) · Still (PNG) · Spec (YAML) · Model (MJCF)
