Abstract
In fluid power systems, cavitation under nonsteady flow conditions is a major factor limiting the response and reliability. As the most fundamental phenomenon, the time lag of nonsteady cavitation in restrictors is discussed. First, the times required to establish the single phase flow pattern and for bubbles to grow from cavitation nuclei are estimated and found to be much shorter than that required to generate the nuclei. Then, by applying both the hole theory and theory of rate processes, a predication formula for the time lag is derived. The calculated results coincide with the experimental ones.
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