Ladder energy dissipater with doped gas device preposed
An energy dissipating and gas device technology, applied in water conservancy projects, marine engineering, coastline protection, etc., can solve the problems of difficult control of aeration amount and aeration concentration, additional gas supply equipment, etc. Air volume is easy to control, easy to optimize the effect
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[0035] Example 1
[0036] The stepped energy dissipater of the pre-aeration device in this embodiment is used in the power station engineering hub, and the water collection area of the power station is 5317km 2 , The site control catchment area is 5754km 2 . The maximum working head of the spillway of the power station is 140m, and the maximum discharge flow is 760m 3 / s, the designed spillway width is 10m, the bottom slope θ is 18°, and the maximum single-width flow is 76m 3 / s.m.
[0037]The structure of the stepped energy dissipater of the pre-aeration device in this embodiment is shown in Fig. 3 and Fig. 4, and includes a step 4 arranged on the bottom slope 1 of the spillway and an aeration device located upstream of the step. The aeration device consists of a sill 2, a vent hole 3 and a gas well 7; the sill 2 is set on the bottom slope 1 of the spillway, and its shape is "wedge", its slope i is 1:5, and its height Δ 1 = 1m, the distance L between its rear end and the front ...
Example Embodiment
[0040] Example 2
[0041] The stepped energy dissipater of the pre-aeration device in this embodiment is used for a single-width flow rate of 50-70m 3 / s.m, a hydropower project with a dam surface overflow bottom slope θ of 13°.
[0042] The structure of the stepped energy dissipater of the pre-aeration device in this embodiment is shown in Figs. 7 and 8, and includes a step 4 arranged on the overflow bottom slope 1 of the dam surface and an aeration device located upstream of the step. The aeration device consists of a sill 2, aeration trough 8, a vent 3 and a gas well 7; the sill 2 is set on the bottom slope 1 where the dam surface overflows, and its shape is "wedge", and its slope i is 1:10, its height Δ 1 =0.5m, the distance L between its rear end and the front end of the first step in the step 0 =42m; the aeration trough 8 is located on the overflow bottom slope of the dam surface and under the sill 2, the trough depth Δ=1.5m, and its range is the area enclosed by a, b, c, an...
Example Embodiment
[0044] Example 3
[0045] The stepped energy dissipater of the pre-aeration device in this embodiment is used for a single-width flow rate of 50-70m 3 / s.m, a hydropower project with a spillway bottom slope θ of 15°.
[0046] The structure of the stepped energy dissipater of the pre-aeration device in this embodiment is shown in Fig. 11 and Fig. 12, and includes a step 4 arranged on the bottom slope 1 of the spillway and an aeration device located upstream of the step. The aeration device is composed of a sill 2, a sill 9, a vent hole 3 and a gas well 7; the sill 2 is set on the bottom slope 1 of the spillway, and its shape is "wedge", and its slope i is 1:10, Its height Δ 1 =0.5m, the distance L between its rear end and the front end of the first step in the step 0 =39.78m; slam 9 is located on the bottom slope of the spillway and below slam 2, the slam height Δ 2 =1.5m; There are two vent holes 3, which are located on the two side walls 6 of the spillway and are close to the bac...
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