ABOUT MINIMUM NUMBER OF CAVITATIONS AND WIDTH OF CAVERN IN A FLAT AND AXIALLY SYMMETRICAL CHANNELS (O MINIMALNOM CHISLE KAVITATSII I SHIRINE KAVERNY V PLOSKOM I OSESIMMETRICHNOM KANALAKH),
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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The author studies the width of the cavity behind a body in plane and axisymmetric channels. Formulas are given for calculating the minimum cavitation number and also for finding the width of the cavity as a function of the cavitation number and the ratio of the transverse dimensions of the body in the channel. The results are given in the form of graphs and compared with data in the literature. Curves are given showing the effect of the channel walls on the width of the cavity, with the ratio of the width in the channel to that in an unbounded fluid being laid off along the y-axis while the cavitation number is plotted along the x-axis. It is found that the width of the cavity increases as that of the channel is reduced for plane and circular channels with bodies of identical size and identical cavitation numbers. No matter how distant the walls, the area of the center section of the cavity behind a body in a channel is twice as great at the same minimum cavitation number as that of the center of the cavity behind a body in an unbounded fluid. This effect is briefly discussed and a physical explanation is given.
- Fluid Mechanics