Tidal Power by Lyatkher Victor

Author:Lyatkher, Victor
Language: eng
Format: epub
ISBN: 9781118721032
Publisher: Wiley
Published: 2014-04-01T16:00:00+00:00

Tests by developers of the water wheel in a slanting stream showed systematic increase in power at some corners (fig. 3.5) and confirmed the overall effectiveness of the use of concentrators.

Figure 3.5 Results of tests of the turbine in a slanting stream in the presence of the concentrator (1) and in its absence (2).

In the described shock scheme, it is even more important to allow a considerable increase in the current speed in a pipe than to increase the speeds of the currents in the environment during the period between water hammers. The hydroshock unit is approximately 3 times more effective than the free traditional collinear hydro unit with swept surface, the equal area of section of a pipe. A rational design of the unit speed in a pipe U is significantly more than the speed of a stream of U0 on the way to the unit. The determination of speed of U in quasi-stationary currents in a pipe is the central problem of hydraulic calculation of system. This speed depends on an outline of bringing and taking-away sites of the central pipe. In fig. 3.6 the air model on which the operating conditions of cylindrical concentrators are established on an entrance to a tuba. This was studied and was shown, in principle, to have to increase pressure on an entrance and lower pressure at the pipe exit.

Figure 3.6 Photo of aerodynamic model on which influence of a form of the concentrator and expense giving in a vacuum zone behind the concentrator was studied. Liquid fence from the pressure head part and giving on the back part were carried out on independent channels. In the center the disk on which pressure distribution was measured is visible. On this disk ring nozzles concentrators of different length were put on. Through this disk air that imitated work of an entrance site of a shock pipe was sucked away.

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