多彎段溢洪道糙條對(duì)水流消能導(dǎo)流作用研究
[Abstract]:In engineering practice, the spillway of multi-curved section and other hydraulic structures are often restricted by local topography, geology and other factors, and the spillway turns an angle according to the local conditions on the plane, which not only makes full use of the topography, but also saves the engineering quantity. Taking the spillway of "635" reservoir as the research object, the flow guide piers of appropriate size are arranged in the spillway of multi-bend section by the method of model test and numerical simulation. The results are as follows: (1) the addition of rough strip in spillway of multi-curved section is an ideal engineering measure to solve the circulation of curved channel. It not only reduces the velocity of flow in roughened area by a large margin, but also leads the flow of water to the convex bank at a certain angle between the stripe arrangement and the cross section of the spillway, thus reducing the water level difference between the concave and convex banks. (2) multiple stripes are arranged continuously at a certain distance on the spillway in the multi-curved section. The effect of energy dissipation and diversion on water flow is superior to that of single stripe arrangement. For spillway bends in the straight transition section, rough strips are arranged reasonably in the bend section to prevent the upstream water level of the bend from surpassing the sidewall and so on. (3) the design scheme of three different stripe widths and four layout angles, Combined experiments were carried out respectively. The results show that the energy dissipation and diversion effect of "635" spillway is better than that of bang 1.33 m when the width of stripe is 2.50 m. However, the effect of energy dissipation and diversion at the angle of 胃 = 30 擄is far less than that of the arrangement of angle 胃 = 11.785 擄~ 24 擄. At the same time, it is also shown that the flow velocity reduction effect on the side of the coarseness bank is better. (4) according to the angle 胃 of the stripe design, the design width b and the height of the convex bank h _ 1 / h _ 2, there are 135 kinds of combined design schemes. The energy dissipation and diversion of spillway in multi-curved section are discussed. When stripe width b=1/21B~1/39B (B is spillway width); When the stripe height H1 is 1 / 2.17hU / 1 / 3.4h, the stripe height H2 is 1/3.2h~1/6.7h (h is the mean water depth of the spillway concave bank), the energy dissipation and diversion effect of the multi-curved spillway is remarkable.
【學(xué)位授予單位】:新疆農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:TV651.1;TV135.2
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