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Гидравлические устройства для защиты нижних бьефов гидроузлов

Гидравлические устройства для защиты нижних бьефов гидроузлов

Abstract

На основе вихревой теории Кармана определены расчетные зависимости для скорости, индуцированной в потоке от действия профиля, подъемная сила и сила лобового сопротивления, действующие на профиль. Выполненные в среде MathCAD расчеты позволили для заданной скорости набегающего потока вычислить высоту миделевого сечения руслоформирующего профиля, ширину профиля по хорде, размах профиля, угол атаки, скорость индуцированного потока. Для вычисленных параметров профиля определены величина циркуляции скорости, сила лобового сопротивления и подъемная сила. В качестве руслоформирующих профилей рекомендуется использовать плоские пластины, рамные конструкции с поперечными нервюрами в форме дужки, рыбообразные симметричные или слабоизогнутые профили. Произведена оценка способов установки профилей в потоке в зависимости от угла атаки - по три варианта для симметричных и по шесть вариантов для несимметричных. Разработана схема устройства для защиты нижних бьефов гидроузлов от размыва на основе погруженного профиля NACA 0302 или профиля Жуковского, изготавливаемого из гибких материалов, включающая профили, систему несущих и регулирующих канатов и береговые или донные опоры. Такая конструкция является мобильной, предназначенной для периодического регулирования стока наносов

Based on the Karman vortex theory, the calculated dependences for velocity induced by profile action in the flow, lifting force and drag force, acting on the profile, are determined. Calculations, performed in MathCAD, allowed, for the given up-stream velocity, to calculate height of mid-section of the bed-formation profile, width of the profile along the chord, span of the profile, angle of attack, velocity of the induced flow. For the calculated profile parameters, the velocity circulation value, drag force and lifting force are determined. As the bed-formation profiles, it is recommended to use flat plates, frame constructions with transverse ribs in the form of arch, fish-like symmetric or slightly curved profiles. Ways of the profile installation in the flow, depending on the angle of attack, are evaluated: three versions - for symmetric profiles, and six versions - for asymmetric profiles. Diagram of the device for the hydrosystem tailrace protection against erosion is developed on the basis of submerged NACA 0302 profile or profile of Zhukovsky, made of flexible materials, including profiles, system of supporting and regulating ropes, and shore or bottom supports. This design is mobile, intended for the periodic regulation of sediment yield

Keywords

ГИДРОУЗЕЛ,ВОДОСЛИВНАЯ ПЛОТИНА,СОПРЯЖЕНИЕ БЬЕФОВ,РАЗМЫВ РУСЛА,ГИДРОДИНАМИЧЕСКИЙ ПРОФИЛЬ,ГИДРАВЛИЧЕСКОЕ УСТРОЙСТВО ДЛЯ ЗАЩИТЫ ОТ РАЗМЫВА,HYDROSYSTEM,SPILLWAY DAM,RACE CONJUGATION,BED EROSION,HYDRODYNAMIC PROFILE,HYDRAULIC DEVICE FOR PROTECTION AGAINST EROSION

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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