| 摘要 |
Rarefaction pulses are generated in a chamber containing a liquid to be degassed. The rarefaction pulses are generated by creating repeated water hammers in a conduit. The water hammers result in sudden high pressure pulses which deform a stiff springy, impermeable deflection cap. After the water hammer pulses pass, the deflection cap snaps back toward its equilibrium position. The snapping action of the deflection cap causes a rarefaction pressure pulse which enhances bubble formation in the chamber. The deflection cap may resonate for some time after each water hammer pulse passes. During the interval when the deflection cap resonates the deflection cap generates an attenuated acoustic wave which is transmitted into the liquid being degassed. The deflection cap may also be driven by a system in which a high pressure fluid, such as steam, is introduced into a sealed chamber behind the deflection cap and then suddenly vented.
|
