SU1006587A1 - Method for controlling hydraulic jump in water discharge structure having end tip - Google Patents

Abstract

CONTROL METHOD-chamber hydraulic jumping in spillway terminated springboard comprising distilled off and pass hydraulic jump with the calculated energy flow, characterized in that, in order to reduce erosion of the riverbed downstream and prevent prolonged exposure to the large hydrodynamic loads on the structure, a jump is performed distilled off by decreasing the springboard tilt angle with a subsequent increase in the angle to the calculated

Description

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The invention relates to hydraulic construction, in particular, to methods for controlling hydraulic fittings in spillway structures with end springboard. There is a known method of controlling a hydraulic jump in a water spring building with an end springboard, which includes passing a stream with energy exceeding the energy of the design flow 1. There is a known method of controlling a hydraulic jump in a water spring building with an end springboard, and skipping the flow with a calculated energy 2. The disadvantage of the known jump The method is that due to the long-term passage of a stream with increased energy, the erosion of the channel in the lower pool occurs. The purpose of the invention is to reduce the erosion of the channel in the downstream and to avoid prolonged exposure to large hydrodynamic loads on the structure. This goal is achieved by the fact that the distillation of the jump is carried out by reducing the angle of the springboard, followed by increasing the angle to the calculated one. FIG. 1 shows a spillway device performing a method; a hydraulic jump is pulled in, a longitudinal section; in fig. 2 - the same, when skipping a stream with increased energy, the jump is driven off; in fig. 3 - the same, when skipping a stream with a calculated energy, the jump is distilled. The flow with the calculated energy is carried out by opening the shutter 1 installed at the end of the inlet section of the spillway 2, which is opened by the amount h, which allows the passage of a given flow rate Q. In this case, a hydraulic jump 4 is formed in front of the templ 3. the construction of the shutter 1 remains in the same position, and the angle VCP of the inclination of the working surface of the tampline 3 is reduced to a value by an amount that ensures the distillation of the hydraulic jump 4 beyond the limits of the construction no. After the hydraulic jump off the corner 4 | increase to the previous calculated dp. At the same time, hydraulic jump 4 does not reappear within the construction, no matter how long it is operated. Thus, the proposed method makes it possible to reduce the erosion of the channel in the downstream and prevent the effects of high hydrodynamic loads on the structure.

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Claims (1)

METHOD FOR CONTROL OF A HYDRAULIC * RAVLIC JUMP IN A WATER DRAINAGE STRUCTURE WITH AN END Trampoline, including distillation of a hydraulic jump and passage of a stream with rated energy, characterized in that, in order to reduce the erosion of the riverbed in the downstream and to prevent long-distance impacts, to prevent long-distance impacts, carried out by reducing the angle of the springboard with a subsequent increase in the angle to the calculated.