EP0673456B1 - Procede d'embranchement hydraulique d'un courant ouvert et embranchement de canaux a fonctionnement hydraulique - Google Patents

Procede d'embranchement hydraulique d'un courant ouvert et embranchement de canaux a fonctionnement hydraulique Download PDF

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Publication number
EP0673456B1
EP0673456B1 EP94901799A EP94901799A EP0673456B1 EP 0673456 B1 EP0673456 B1 EP 0673456B1 EP 94901799 A EP94901799 A EP 94901799A EP 94901799 A EP94901799 A EP 94901799A EP 0673456 B1 EP0673456 B1 EP 0673456B1
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Prior art keywords
channel
branch
wall
momentum
corner
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Expired - Lifetime
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EP94901799A
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German (de)
English (en)
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EP0673456A1 (fr
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Anton Felder
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B13/00—Irrigation ditches, i.e. gravity flow, open channel water distribution systems
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow

Definitions

  • the invention relates to a method for hydraulically branching an open flow with at least one straight outgoing main flow of a specific pulse and one or more branch flows.
  • the invention also relates to such a hydraulically operating channel branch for distributing liquids, in particular water, in open channels.
  • the subject of the invention is the application of the method and the channel branching in hydraulic engineering, settlement management and irrigation technology.
  • Duct separations from open ducts are found in very specific hydraulic applications, namely where water has to be distributed. Such tasks arise in hydraulic engineering as well as in urban water management and in irrigation technology. While water must be supplied to fields in irrigation systems, in the wastewater area, water is often added to the basin through distribution channels on the long side. The special case of uniform distribution plays the central role in all applications.
  • the great disadvantage of conventional sewer branches is that so far no uniform or controllable distribution of the water has been possible due to separation phenomena and the effects of curvature. In addition, the complex phenomenon largely eluded elementary analysis.
  • the branching problem is mainly about the flow distribution, ie the ratio of the flows in the laterally branching and the continuous duct branch.
  • the flow conditions of separating streams show a dead water zone on the inside of the branch channel and a less pronounced separation area on the outside of the underwater channel. Furthermore, there is a typical stagnation point flow with soil detachment at the branching edge.
  • the separation streamline on the surface runs approximately axially between the two branches towards the branching edge, on the other hand this runs far into the underwater channel on the ground. This creates a secondary flow in line with the separation zones, which induces a bottom flow in the direction of the branch duct.
  • a spiral secondary flow is superimposed on the primary flow, which flows on the surface towards the outside and therefore flows towards the inside at the bottom.
  • the water level gradient towards the center of the curvature is also typical.
  • the invention has for its object to make such a method for hydraulic branching of an open flow simple, effective and better controllable, as independent as possible of the water level, the inflow amount, the branching angle and the channel widths. It is also an object of the invention to make such a hydraulically operating channel branch structurally simple for the distribution of water in open channels and to ensure a more controllable distribution irrespective of the water level, the inflow quantity, the branching angle and the channel widths.
  • the wall for the main flow in front of the branching point is widened like a trough into the branch wall, i.e. the wall for the branch flow, rounded over.
  • the Coanda effect is expediently caused by the pulse current with the higher potential energy.
  • the small pulse jet can be fed with extraneous water as an external impulse. This can then be done, for example, in such a way that outside the wall of the main flow and, for example, parallel to it, an external impulse flow, for example an extraneous water flow, is led into the region of the rounded corner and then takes over its task of leading the partial flow around the corner.
  • the desired division of the wet medium, in particular water can be controlled in the channel branch depending on the size of the exit pulse.
  • the duct branching can be carried out in such a way that the deflection angle ⁇ at the rounded corner, which corresponds to the branch angle ⁇ , can be changed. Different outlet gap sizes can be formed.
  • the protruding wall in the upper water can go straight through the water depth.
  • the protruding wall For certain tasks that involve the need to carry a particularly large amount of water at the bottom of the channel, it is possible to deform the protruding wall over the water depth in accordance with a function specified by the desired structure, such that e.g. the wall is cup-shaped in the end view, i.e. from a large gap width above parabolic tapered towards a small gap width below.
  • the deformation must be carried out according to the desired structure over the water depth.
  • the method according to the invention cannot be derived from EP-A-0 281 856.
  • a uniform water distribution is only achieved there if diverting partitions are erected in the area of the start of the branch.
  • the measure of the invention means a surprising step forward.
  • the advantages achieved by the invention consist in particular in that the distribution of the water can be controlled by the liquid jet emerging from the gap, which then uses the Coanda effect on the edge of the rounded corner.
  • the wall steel beam thus opening into the branch duct has the effect that, in contrast to conventional branch ducts, there is no separation area on the inside of the branch duct and dead water zone on the outside of the branch duct Underwater channel can form.
  • the flow pattern, viewed across the entire channel cross-section, is evenly deformed to the separation flow line. This flow pattern enables both analytical and numerical calculation. It is also of enormous importance that for the division of the water by 50% into the branch channel and the underwater channel, the required impulse of the emerging jet from the gap only has to be 1/100 of the impulse of the main flow.
  • the Coanda effect is the deflection of a beam towards a curved wall.
  • the application is based on a vacuum effect in the area of the wall-side beam edge.
  • Open channels mean free-mirror channels.
  • a T-branch is shown.
  • a wall 3 protruding into the upper water channel 2 is led to the rounded corner 4 in a warpage.
  • the protruding wall 3 forms, with the side wall 5 of the upper water channel leading outward in a warping, a small side channel 6 which tapers towards the rounded corner until approximately the original width bo of the upper water channel of the main flow is given again.
  • the outward leading side wall 5 of the upper water channel is first curved very flat out of the straight line and then before the transition to rounded corner 4 shaped more to shape the trough-like configuration.
  • the wall 5 is thus widened to the outside without discounts.
  • the water flowing in the small side channel 6 formed in this way is not inconsiderably dammed up into the area of the gap 7. This happens through the narrow exit gap 7, which is formed between the projecting wall 3 and the opposite rounded corner 4.
  • the water Qo flows in in FIG. 1 in the direction of the arrow of the T-branch.
  • the protruding wall 3 causes a certain amount of congestion in the headwater, which remains in the side channel 6 up to the outlet gap.
  • the normal water depth is approximately present again in the immediate area of the T-branch, there is a potential difference between side channel 6 and branch channel 1.
  • the potential difference now causes a liquid jet to emerge from the outlet gap 7 and, due to the Coanda effect, along the rounded corner 4 in the branch duct 1 flows into it.
  • the consequence of this is a uniform deformation of the flow field in the T-branch in such a way that the desired division of the water as a function of the exit pulse is achieved.
  • FIGS. 2a-2c Variations of these relationships are shown in FIGS. 2a-2c, possibilities with which the exit pulse of the beam can be controlled. If the protruding wall 3 is straight over the water depth according to FIG. 2a, then it is cup-shaped according to FIG. 2b over the water depth, and vice versa cup-shaped according to FIG Exit pulse of the beam. If the amount of passage over the water depth according to FIG. 2a in the side channel is the same from top to bottom, then it increases as a result of the parabolic design of the wall 3 according to FIG. Figure 2b, acc. Figure 2c (reverse parabola) too.
  • the wall 3 is used so that detachments do not occur on the wall.
  • the projecting wall 3 can consist of a relatively thin sheet metal in order to separate the flow from the main channel from the side channel.
  • Stainless steel is possible for sewers. This warping / tapering of the wall 3 must not be more oblique than 8 ° to the main flow direction in order to still produce the desired effect.
  • FIG. 3 shows an embodiment according to the invention which can be used if the branching angle is changed in a range from 10 ° to 160 °; the same reference symbols stand for the same elements.
  • FIG. 5 shows an embodiment with two branching channels, of which the width ba and the flow rate Qa are specified. This is an embodiment with external energy pulse Qf and the representation is symmetrical in each case. Two outlet gaps 7 are provided opposite each other

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Nozzles (AREA)
  • Revetment (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Catching Or Destruction (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Servomotors (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Lubricants (AREA)
  • Massaging Devices (AREA)

Claims (15)

  1. Procédé pour le branchement hydraulique d'un écoulement à ciel ouvert, avec au moins un écoulement principal sortant rectiligne d'une certaine impulsion, et avec un ou plusieurs écoulements de branchement, caractérisé en ce qu'un courant pulsé, qui, par son ordre de grandeur, est plus petit que celui du courant principal, est dirigé contre un coin commun arrondi (4) entre le courant principal et le courant de branchement, de telle sorte que, par utilisation de l'effet Coanda, le branchement s'effectue sans courants secondaires et sans zones d'eaux mortes.
  2. Procédé selon la revendication 1, caractérisé en ce que le courant pulsé est égal au 1/100 de l'impulsion de l'écoulement principal.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que la paroi destinée à l'écoulement principal, en amont du point de branchement, présente une transition arrondie, avec un évasement en forme d'auge, avec la paroi de branchement (paroi destinée à l'écoulement de branchement).
  4. Procédé selon la revendication 3, caractérisé en ce qu'on fait en sorte qu'un jet soit retenu jusqu'à une fente, qu'il sorte de cette fente et vienne s'appuyer contre la paroi incurvée, et de ce fait provoque la déformation uniforme du champ d'écoulement.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que le petit jet pulsé est alimenté en eau d'importation (Qf) servant d'impulsion étrangère.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que la répartition souhaitée de l'eau dans la dérivation peut être pilotée en fonction de la grandeur de l'impulsion de sortie.
  7. Dérivation de canal à fonctionnement hydraulique pour répartir des liquides, en particulier de l'eau, dans des canaux à ciel ouvert, comprenant :
    a) un coin commun, en particulier arrondi en forme d'arc de cercle, entre le canal d'eau d'amont et le canal latéral ;
    b) un mur (3) convergeant vers le coin (4), mur qui court contre le mur, dirigé vers le coin (4), du canal d'eau d'amont ; et
    c) le mur (3) forme, avec le coin (4), une fente de sortie (7), le courant pulsé sortant par utilisation de l'effet Coanda s'appuyant contre le bord du coin arrondi (4) sous forme d'un jet de paroi.
  8. Branchement de canal selon l'une des revendications 5 à 7, caractérisé en ce que l'angle de renvoi (α) au niveau du coin arrondi (4), et qui correspond à l'angle de branchement (β), est variable.
  9. Branchement de canal selon l'une des revendications 6 à 8, caractérisé en ce que peuvent être réalisées différentes grandeurs de la fente de sortie (7).
  10. Branchement de canal selon l'une des revendications précédentes, caractérisé en ce que le mur rentrant (3), dans les eaux d'amont (2), subit une déformation correspondant à une fonction prédéfinie par la retenue souhaitée, et ce sur la profondeur de l'eau.
  11. Branchement de canal selon la revendication 10, caractérisé en ce que la forme de la paroi (3), en vue de devant, est en gobelet (Figure 2B) ou en gobelet inversé (Figure 2C).
  12. Branchement de canal selon l'une des revendications précédentes, caractérisé par l'injection d'eau d'importation (Qf) servant d'impulsion étrangère pour produire un jet de sortie à partir de la fente (7).
  13. Branchement de canal selon l'une des revendications précédentes, caractérisé en ce que le mur (5), dirigé vers le coin arrondi, du canal d'eau d'amont (l'écoulement principal) est configuré en retrait en forme d'auge.
  14. Branchement de canal selon la revendication 13, caractérisé en ce que la transition à partir de la droite (6) est d'abord très faiblement incurvée, puis, avant la transition avec le coin arrondi (4), se déforme plus fort jusqu'à avoir la forme de la configuration en forme d'auge.
  15. Utilisation du procédé selon l'une des revendications 1 à 6, ainsi que du branchement de canal selon l'une des revendications 7 à 14, en construction hydraulique, dans l'économie des eaux dans les agglomérations et dans les techniques d'irrigation.
EP94901799A 1992-11-17 1993-11-15 Procede d'embranchement hydraulique d'un courant ouvert et embranchement de canaux a fonctionnement hydraulique Expired - Lifetime EP0673456B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4238830A DE4238830A1 (de) 1992-11-17 1992-11-17 Verfahren zum hydraulischen Verzweigen einer offenen Strömung sowie hydraulisch arbeitende Kanalverzweigung
DE4238830 1992-11-17
PCT/EP1993/003195 WO1994011580A1 (fr) 1992-11-17 1993-11-15 Procede d'embranchement hydraulique d'un courant ouvert et embranchement de canaux a fonctionnement hydraulique

Publications (2)

Publication Number Publication Date
EP0673456A1 EP0673456A1 (fr) 1995-09-27
EP0673456B1 true EP0673456B1 (fr) 1996-07-24

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Application Number Title Priority Date Filing Date
EP94901799A Expired - Lifetime EP0673456B1 (fr) 1992-11-17 1993-11-15 Procede d'embranchement hydraulique d'un courant ouvert et embranchement de canaux a fonctionnement hydraulique

Country Status (11)

Country Link
US (1) US5567079A (fr)
EP (1) EP0673456B1 (fr)
JP (1) JPH08508071A (fr)
CN (1) CN1103691A (fr)
AT (1) ATE140744T1 (fr)
AU (1) AU5624394A (fr)
DE (2) DE4238830A1 (fr)
MX (1) MX9307190A (fr)
PL (1) PL171636B1 (fr)
TR (1) TR27196A (fr)
WO (1) WO1994011580A1 (fr)

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US6019894A (en) 1997-11-13 2000-02-01 Clearline Systems, Inc. Appliance drain assembly
EP1159266B1 (fr) 1999-03-05 2004-11-03 Duke University Analogues de prostaglandines c-16 fp selectives insaturees
DE19925604C1 (de) * 1999-06-04 2001-01-11 Hermann Christiansen Vorrichtung für fließende Gewässer
US6894175B1 (en) * 1999-08-04 2005-05-17 The Procter & Gamble Company 2-Decarboxy-2-phosphinico prostaglandin derivatives and methods for their preparation and use
US20020037914A1 (en) * 2000-03-31 2002-03-28 Delong Mitchell Anthony Compositions and methods for treating hair loss using C16-C20 aromatic tetrahydro prostaglandins
US20020013294A1 (en) 2000-03-31 2002-01-31 Delong Mitchell Anthony Cosmetic and pharmaceutical compositions and methods using 2-decarboxy-2-phosphinico derivatives
US20020172693A1 (en) 2000-03-31 2002-11-21 Delong Michell Anthony Compositions and methods for treating hair loss using non-naturally occurring prostaglandins
JP2002098285A (ja) * 2000-09-22 2002-04-05 Mitsubishi Heavy Ind Ltd 分岐管路の配管構造
US7192218B2 (en) * 2004-02-24 2007-03-20 Ps Systems Inc. Direct recharge injection of underground water reservoirs
US8074670B2 (en) * 2006-09-26 2011-12-13 PS Systems, Inc. Maintaining dynamic water storage in underground porosity reservoirs
US7972080B2 (en) * 2007-03-14 2011-07-05 PS Systems, Inc. Bank-sided porosity storage reservoirs
US8623918B2 (en) 2008-10-29 2014-01-07 Novaer Holdings, Inc. Amino acid salts of prostaglandins
US8722739B2 (en) 2008-10-29 2014-05-13 Novaer Holdings, Inc. Amino acid salts of prostaglandins
US8387662B2 (en) * 2010-12-02 2013-03-05 Halliburton Energy Services, Inc. Device for directing the flow of a fluid using a pressure switch
WO2013178287A1 (fr) * 2012-06-01 2013-12-05 Dieffenbacher Gmbh Maschinen Und- Anlagenbau Coude pour introduire un courant de vapeur et de fibres dans un séchoir ou un cuvier de stockage de la pulpe d'une usine de traitement de fibres, installation de soufflage avec un coude, et usine de traitement de fibres avec une installation de soufflage
CN110647039B (zh) * 2019-10-08 2022-03-25 黄河勘测规划设计研究院有限公司 长距离明渠输水工程同步控制自适应平衡调度方法
CN111411608A (zh) * 2020-04-01 2020-07-14 中国科学院南京地理与湖泊研究所 湖底表层污染物和藻种扫除收集与捕获内源一体化方法
CN112943753B (zh) * 2021-04-09 2022-06-24 浙江大学 一种扩张辐射流动机构
CN115434279A (zh) * 2022-10-26 2022-12-06 重庆交通大学 已建挡潮闸的感潮河段干支流交汇处河口段通航方法
CN116084338B (zh) * 2023-02-24 2024-05-24 重庆交通大学 大落差大夹角运河支流汇入干流的治理方法

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Also Published As

Publication number Publication date
JPH08508071A (ja) 1996-08-27
PL171636B1 (pl) 1997-05-30
DE59303339D1 (de) 1996-08-29
TR27196A (tr) 1994-12-05
EP0673456A1 (fr) 1995-09-27
AU5624394A (en) 1994-06-08
ATE140744T1 (de) 1996-08-15
DE4238830A1 (de) 1994-05-19
WO1994011580A1 (fr) 1994-05-26
US5567079A (en) 1996-10-22
PL308758A1 (en) 1995-08-21
MX9307190A (es) 1994-07-29
CN1103691A (zh) 1995-06-14

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