SU1686066A1 - Method for damping kinetic energy of flow on spillway - Google Patents

Abstract

The invention relates to hydraulic engineering and can be used to quench the energy of the flow in the water discharge structures of the waterworks. The purpose of the invention is to increase the efficiency of quenching the kinetic energy by increasing the aeration of the separated streams. Water from the upstream 1 is fed to the spillway 2 of the dam 3 when lifting the shutter 4, where it is divided into two streams, driving 1 4 within the dam 3 ape to two Rusa along its height. Separated rejecting streams toward the downstream 7 with toes-springboards 8 and 9 and collide in flight, dropping the upper stream to the lower stream 6 in the apex zone of the flight trajectory of stream 6 and facing the dam facing the dam 3 From the bottom to the upstream branch of the lower stream 6, and facing the opposite direction to the downward branch of the stream 6. Moreover, the lower stream 6 is thrown with a toe-tramplin 9 along a gentle trajectory, and the upper stream 5 - along a steeper trajectory and collides with bottom flow 6 at an angle a 60 - 70 °; to the flow trajectory of the stream 6. After the collision of the streams 5 and 6, when they mate with the surface of the water 10 of the lower pool 7, the final quenching of the energies of the streams 5 and 6 takes place. 1 sludge. Ё О 00 О О Os ск

Description

The invention relates to hydraulic engineering and can be used to quench the energy of the flow in the water discharge structures of the waterworks.

The purpose of the invention is to increase the efficiency of quenching the kinetic energy by increasing the aeration of the separated streams.

. The drawing shows a spillway dam, transverse section.

The method of quenching the kinetic energy of the flow is as follows.

Water from the upper pool 1 is fed to the spillway 2 of the dam 3 when lifting the shutter 4 and is divided therein by means of a known separator construction (not shown) into two streams moving within the limits of the dam 3 along two Rus along its height, the upper 5 and the lower 6 each of which is dumped towards the downstream 7 by means of the 8 and 9 socks-springboards located at different levels, the lower of which is located above the maximum level 10 of the downstream 7. The lower stream 6 is discarded by means of the sock-springboard 9 along a gentle trajectory

at an angle of / 20 - 35 ° to the horizon with a maximum approach to the surface of water 10 in the downstream 7 to reduce the height of the fall of the jets after the collision of both streams 5 and 6. At the same time, the upper stream 5 is thrown with a toe-springboard 8 which is steeper than the lower stream 6, the trajectories are at an angle of up to 70 ° to the horizon, and with an increase in the height of the upper toe-springboard 8, the angle of inclination of its surface to the horizon decreases, and as the height of the sock-spring 8 decreases, the angle of rejection increases, resulting in an increase in the branches and the steepness of the flight path of the upper stream 5 and its aeration increases.

Flows 5 and 6 strike in flight, with the upper stream 5 being dropped onto the lower stream 6 in the apex zone of the flight path of the latter and directing the 3 layers of upper stream 5 facing the dam to the ascending branch of the lower stream b. counter0

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the false side is on the downward branch of the lower stream 6. The upper stream 5 should be rejected with a toe-springboard 8 so that at the site of impact with the lower stream 6 it has the steepest flight path that intensifies the quenching of the energies of the colliding streams 5 and 6. Experimental studies have shown that the most effective quenching of the energies of the colliding flows 5 and 6 occurs when the upper flow 5 collides with the lower flow 6 at an angle a 60 - 70 ° to the flight path of the latter.

The proposed method makes it possible to lengthen the flight path of both streams 5 and 6, intensify their aeration, move away from the dam 3 the zone of their impact, and ensure deeper penetration of the streams of one stream into another stream.

After the collision of the streams 5 and 6, when they are mated with the surface of the water 10 of the lower pool 7, the final quenching of the energies of the streams 5 and 6 occurs.

Claims (1)

Invention Formula The method of quenching the kinetic energy of the flow. On the water discharge, including the supply of water from the upstream to the spillway of the dam and its division into two streams moving within the dam along two Rusa along its height, the garbage of the separated streams with socks and springboards towards the downstream with collision flight and the quenching of their energies in conjunction with the downstream, the discarded streams collide in flight, dropping the upper stream to the lower stream in the zone of the apex of the flight path of the latter and directing in the direction of The upper layers of the upper stream are on the upstream branch of the lower stream, and facing the opposite direction - on the downward branch of the lower stream, characterized in that, in order to increase the kinetic energy quenching efficiency by increasing the aeration of the separated streams, the lower stream is thrown toe-by-springboard a shallow trajectory, and the upper one — a more upper stream collide with the lower stream at an angle of 60-70 ° to the flight path of the latter.