| 摘要 |
PROBLEM TO BE SOLVED: To exhaust gas phase accumulated in a siphon tube tip part in a short time by sucking the gas phase accumulated in the siphon tube tip part with a dynamic pressure of a liquid phase flowing through the inside of a siphon tube and exhausting and mixing the gas phase into the liquid phase. SOLUTION: A liquid phase flows into a siphon tube by the start of a pump so as to force out a gas phase. When the velocity of the liquid phase is small, the gas phase is accumulated in a space 5. The dynamic pressure P1 of the liquid phase flowing the space 5 by the gas phase is P1=0.5ρ(V1)2. In this case, the flow velocity V2 of the liquid phase at the outlet of an opening 8 is zero and, at the time of start of the flow, a liquid level of a height equal to a liquid phase difference H between a space 6 and the opening 8 is formed in a flow passage 7. Because, at the outlet of the opening 8, the opening faces rearward from the centerline of the flow passage and the flow velocity is zero, a negative pressure equivalent to the dynamic pressure P1 occurs in a clearance from the peripheral liquid phase, and the liquid phase inside the flow passage 7 is discharged from the opening 8 to a space 6. In this case, because of the relation of P2=ρgH, when the dynamic pressure is larger than a head pressure P2, the liquid phase inside the flow passage 7 is all sucked and discharged into the space 6.
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