Abstract
Abstract A series of experiments is conducted to study the cavitation in the single-row reverse spiral groove liquid-film seals. The experimental system withstanding internal pressure consists of a transparent rotating ring mating with a stationary ring textured with grooves. Liquid-film seals with different groove parameters under different operating conditions are tested, acquiring the distribution and evolution of cavitation and fitting the experimental relations of cavitation boundaries. Results indicate that cavitation occurs in the grooves and many protruding bubbles appear near the liquid-film reformation boundary. Increasing pressure effectively reduces the cavitation but for speed, it's opposite. Although the increase of groove depth and the decrease of spiral angle reduces the cavitation area, effects of them on the cavitation boundaries are different.
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