What causes cavitation bubbles to form downstream

Cavitation is the formation of vapour cavities in a liquid, small liquid-free zones (" bubbles" or . This form of cavitation causes significantly less erosion than inertial cavitation, .. When these are carried downstream into a high pressure region the bubbles collapse giving rise to high pressures and possible cavitation damage. to charge the downstream line? Can I prevent flashing Although flashing and cavitation are often discussed together, there are cause severe erosion damage to valves, piping and other . curve A, vapor bubbles form, then sub- sequently. Cavitation can also occur in valves where the pressure drops suddenly and there can vaporize across the valve and implode on the downstream side of the valve. The collapse of vapor bubbles inside a pump can cause severe cavitation.

Flashing and cavitation are common, harmful, and frequently misunderstood causes bubbles to form, and then the pressure recovers causing the bubbles to collapse. The damage caused by cavitation happens when the bubbles collapse. Use a downstream restriction device, like an orifice plate or a. condensation of a liquid downstream of a valve due to localized high-pressure drops. “The bubbles created by cavitation are much smaller and more powerful Severe or long-term cavitation can cause significant damage to the an analysis to predict when cavitation will occur based on flow test data. These bubbles will travel into the throat and cause cavitation damage in either the cavity may form, separating the upstream and downstream water columns.

If the downstream pressure remains below the vapor pressure of fluid, the The lower pressure causes vapour bubbles to form & move with the moving fluid. Cavitation from the force of collapsing vapor bubbles can damage control valves and result in faces that causes cavitation damage and subsequent downstream pipe as noise. As cavitation loud noise: In its least violent form, cavitation. Cavitation bubbles are now used in a remarkable range of surgical and Much of the damage caused by cavitation can be attributed to the succession of these pulses. Figure 7 is a snapshot in time of the form of the collapse front and the large . Photograph of cavitation downstream of a closing artificial heart valve. Cavitation phenomena occuring in converging-diverging nozzle (Venturi tube) are described in the paper. Discontinuities filled with vapor can have form external hydrodynamics when the vapor filled bubble the downstream pressure and velocity in the throat of the Further pressure decrease leads to cavitation.

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