A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cavitation in swirled flows
Conclusions With an increase of the flow velocity v from 7.58 to 14.67 m/sec and change of k/$ k_{cr} $ in the interval of the most erosion-active values from 0.75 to 0.39, $ E_{ph} $ increases proportionally to $ v^{5} $, although $ E_{f} $ increases proportionally to $ v^{3} $. This indicates that in the presence of general erosion activity of the cavitation regime of the flow, a small erosion action on the wall is observed in swirled flows.The cavitation jet in swirled flows is directed at an angle toward the axis of the conduit as a consequence of the emergence of bubbles in the field of centrifugal forces. This angle and the rate of emergence $ v_{emer} $ increase with increase of the swirl angle α and flow velocity v.The milder erosion action of cavitation in a swirled flow compared with an axial flow for the same cavitation regimes is explained by the large values of pressure at the wall (due to centrifugal forces), emergence of bubbles, and direction of the cavitation jet toward the wall.
Cavitation in swirled flows
Conclusions With an increase of the flow velocity v from 7.58 to 14.67 m/sec and change of k/$ k_{cr} $ in the interval of the most erosion-active values from 0.75 to 0.39, $ E_{ph} $ increases proportionally to $ v^{5} $, although $ E_{f} $ increases proportionally to $ v^{3} $. This indicates that in the presence of general erosion activity of the cavitation regime of the flow, a small erosion action on the wall is observed in swirled flows.The cavitation jet in swirled flows is directed at an angle toward the axis of the conduit as a consequence of the emergence of bubbles in the field of centrifugal forces. This angle and the rate of emergence $ v_{emer} $ increase with increase of the swirl angle α and flow velocity v.The milder erosion action of cavitation in a swirled flow compared with an axial flow for the same cavitation regimes is explained by the large values of pressure at the wall (due to centrifugal forces), emergence of bubbles, and direction of the cavitation jet toward the wall.
Cavitation in swirled flows
Efimov, A. V. (author) / Kuznetsova, T. Yu. (author)
1993
Article (Journal)
English
BKL:
56.30
Wasserbau
Local classification TIB:
770/6550/8000
| Springer Verlag | 1993
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