2007年水利监理工程师手续

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INVESTIGATION OF SUBMERGED INLETS TO DEEP RECTANGULAR SLUICESN. P. Rozanov, N. Ya. Konakhovich,and L. N. Orlova UDC 532.522.001.5The form of the inlet to deep sluices should be selected to meet the following conditions: 1) cavitation does not occur; 2) on changing to a pressure flow from a free flow or vice versa unfavorable transitional regimes do not arise in the sluice, and the pressure remains stable; 3) the dimensions of the inlet bellmouth be as small and its outlines as simple as possible. The last condition can be the reason for allowing some vacuum at the inlet (not causing cavitation), especially if measures are taken to prevent a periodic sucking in of air into the vacuum region through vortices which form in the upper pool, and a stable pressure regime of the pipe is ensured [2].