WO2005066436A1 - Appareil pour produire un flux a contre-courant - Google Patents

Appareil pour produire un flux a contre-courant Download PDF

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Publication number
WO2005066436A1
WO2005066436A1 PCT/AU2005/000017 AU2005000017W WO2005066436A1 WO 2005066436 A1 WO2005066436 A1 WO 2005066436A1 AU 2005000017 W AU2005000017 W AU 2005000017W WO 2005066436 A1 WO2005066436 A1 WO 2005066436A1
Authority
WO
WIPO (PCT)
Prior art keywords
counter
water
current
flow
swimmer
Prior art date
Application number
PCT/AU2005/000017
Other languages
English (en)
Inventor
Pieter Jan De Geeter
Original Assignee
Marecon Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2004900086A external-priority patent/AU2004900086A0/en
Application filed by Marecon Pty Ltd filed Critical Marecon Pty Ltd
Priority to AU2005203918A priority Critical patent/AU2005203918A1/en
Publication of WO2005066436A1 publication Critical patent/WO2005066436A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/12—Arrangements in swimming pools for teaching swimming or for training
    • A63B69/125—Devices for generating a current of water in swimming pools
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/0006—Devices for producing waves in swimming pools

Definitions

  • nozzle systems Another problem encountered by nozzle systems is that they cannot be easily detached from the pool body and deployed in another pool.
  • the divergence of the counter-current is substantially unrestrained both horizontally and vertically.
  • the kinetic head loss would preferably not exceed approximately 0.15 m.
  • the counter-current may diverge laterally away from the swimmer in a manner whereby the flow velocity of a section of the counter-current, taken across the counter-current away from the swimmer, has a curved profile in which the flow is fastest at the centre of the flow.
  • this renders a slightly higher kinetic head at the centreline, as a consequence of which the corresponding reduction in piezometric head causes a lateral force on the swimmer towards the centreline.
  • This 'self centring' effect may be enhanced by a simple elastic tether system that further biases the swimmer towards the centreline without inhibiting his or her stroking action.
  • the apparatus can be secured to the reservoir by means of weights and the stability of the apparatus in use is enhanced by the presence of stabilising hydro-dynamic forces generated during the operation of the apparatus.
  • This may eliminate the need to fix the apparatus to the reservoir by means of fasteners such as bolts, screws, toggles or other mechanical means.
  • Figure 5 is a schematic side view of apparatus illustrated in Figure 1 ;
  • Figure 6 is a schematic front view of the apparatus shown in Figure 5;
  • Figures 9 and 10 are side and front views of further embodiment of the invention.
  • Figures 11 and 12 are side and front views of yet another embodiment.
  • the apparatus 1 has a flow path providing a discharge 4 with a breadth 5 not much larger than the body width 6 of a fast swimmer 7 and an outflow depth 9 not exceeding the swimmer's body depth 10.
  • the width 5 of the discharge 4 is 1 m and the lateral distance from the side edge of the apparatus 1 to the nearest lateral side wall of pool 3 is at least 0.5 m.
  • the initial width of the counter-current 2 is 1 m or slightly greater than the shoulder width of the swimmer 7.
  • FIG. 1 there is shown a cross-section 17 of the velocity of flow 2 across the pool.
  • the direction of the arrows in cross-section 17 indicate the divergence of the flow 2 while the length of the arrows shows that the flow velocity has a curved profile in which the flow is fastest at the centre.
  • the curved velocity profile causes the kinetic energy of the flow 2 to be higher at the centreline A-A than at the flow boundaries 11. This renders a slight water level depression across the counter-current away from the swimmer (perpendicularly to line A-A) and as a consequence a lateral centralizing force 18 will be exerted on a swimmer when located sideways from the centreline.
  • the apparatus 1 shown in Figures 1 and 2 is shown in more detail in Figures 5 and 6.
  • the apparatus 1 comprises a flow path 22 having an intake 28 through which water is drawn from the pool 3, and a discharge 4 from which counter-current 2 is ejected into the pool 3.
  • a water propulsion means in the form of a propeller 26 and a hydraulically or electrically powered motor 27, is located between the intake 28 and discharge 4.
  • the propeller 26 generates a water flow along a flow path 22 extending from the intake 28 to the discharge 4 without a substantial increase in water pressure and at a relatively low energy demand.
  • the flow path 22 includes a conduit 29.
  • the conduit 29 is hydro-dynamically streamlined in accordance with the so-called Venturi principle, having a gradually converging inlet at the intake 28 and a gradually diverging outlet at the discharge 4.
  • the water propulsion means is provided in the form of a rotor 30 with vanes 31.
  • the flow path 22 in the alternate embodiment includes two branches 22', 22". By having two branches 20' and 20" better use is made of the Venturi effect.
  • conduit 34 can be single or bisected.
  • the conduit 29 includes a number of plate type flow partitions or vanes 46 that direct the water towards the discharge 4.
  • the vanes 46 serve to eliminate (or at least dissipate) the rotary "cork screw" component of the flow generated by the rotating action of the thruster blades.
  • the vanes 46 are accordingly used for straightening and smoothing the flow 2 and for minimization of energy demand.
  • the apparatus 1 includes mounting means 50 comprising a weight 42 and pair of rods 41.
  • the conduit 29 is slidably mounted to the rods 41 such that with the use of a buoyancy chamber 39 the system is able to maintain the upper level of the discharge 4 just below the (variable) water level in the pool.
  • reaction force 43 that is directed into the adjacent side wall of pool 3.
  • the reaction force 43 assists with the stabilization of the system.
  • the upward reaction force is effectively cancelled by the opposite force being exerted on the propeller 26.
  • FIG. 9 An alternate arrangement is shown in Figures 9 and 10. In this arrangement a rotor 35 with vanes 36 is driven by a rotary motor 37. Yet another embodiment of the invention is shown in Figures 11 and 12. In this arrangement the apparatus 1 has been physically attached to or incorporated into the outside of an pre-existing pool 3 or during its manufacturing, or after installation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

La présente invention concerne un appareil (1) conçu pour produire un flux à contre-courant (2) dans un corps d'eau contenu à l'intérieur d'un réservoir (3). Cet appareil comprend une voie d'écoulement (22) qui présente une entrée (28) permettant d'extraire de l'eau du corps d'eau, une évacuation (4) permettant de ramener au réservoir (3) l'eau extraite à travers l'entrée (28) sous forme de contre-courant (2) contre lequel un nageur (7) peut nager, ainsi qu'un système de propulsion d'eau (26) permettant de produire un flux d'eau le long de la voie d'écoulement (22), depuis l'entrée (27) jusqu'à l'évacuation (4). Le contre-courant (2) présente une largeur initiale inférieure à la largeur du réservoir (3) et diverge latéralement en s'écartant du nageur (7) de façon que la divergence ne soit sensiblement pas limitée, ce qui provoque une diminution relativement rapide de la vitesse de l'eau dans la direction aval, permettant au nageur (7) de faire varier sa vitesse de nage sur une gamme importante, sans que son éloignement par rapport à l'évacuation (4) ne varie de plus de quelques mètres.
PCT/AU2005/000017 2004-01-09 2005-01-10 Appareil pour produire un flux a contre-courant WO2005066436A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2005203918A AU2005203918A1 (en) 2004-01-09 2005-01-10 Apparatus for generating a counter-current flow

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2004900086 2004-01-09
AU2004900086A AU2004900086A0 (en) 2004-01-09 Counter-Current Exercise Pool

Publications (1)

Publication Number Publication Date
WO2005066436A1 true WO2005066436A1 (fr) 2005-07-21

Family

ID=34744193

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2005/000017 WO2005066436A1 (fr) 2004-01-09 2005-01-10 Appareil pour produire un flux a contre-courant

Country Status (1)

Country Link
WO (1) WO2005066436A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2313835A1 (es) * 2007-04-18 2009-03-01 Enia Tecnica Y Gestion, S.L. Dispositivo de natacion estatica y conjunto de partes para su construccion.
GB2456763A (en) * 2008-01-22 2009-07-29 Nicholas Brian Littleton Swimming pool for continuous swimming
WO2014071536A1 (fr) * 2012-11-12 2014-05-15 Mueller Peter A Système réglable pour nage à contre-courant
US9855479B2 (en) 2016-01-29 2018-01-02 Watkins Manufacturing Corporation Swimming system current generator
CN107795157A (zh) * 2016-08-31 2018-03-13 朱旭东 混合流及逆流式游泳池施工工艺
FR3106500A1 (fr) * 2020-01-28 2021-07-30 Laurent HEQUILY Installation à vagues artificielles dynamiques pour la pratique du surf
WO2023280375A1 (fr) * 2021-07-05 2023-01-12 Thilo Trefz Cellule de pompe pour une installation de surf mobile comprenant une pompe radiale et un diffuseur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2222594A1 (de) * 1972-05-09 1973-11-29 Karl Guenter Hoppe Schwimmbecken mit umlaufstroemung
US5005228A (en) * 1985-09-10 1991-04-09 Swimex Systems, Inc. Flow controlling
GB2296861A (en) * 1995-01-11 1996-07-17 Spaform Ltd Swimming pool having circulating water flow

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2222594A1 (de) * 1972-05-09 1973-11-29 Karl Guenter Hoppe Schwimmbecken mit umlaufstroemung
US5005228A (en) * 1985-09-10 1991-04-09 Swimex Systems, Inc. Flow controlling
GB2296861A (en) * 1995-01-11 1996-07-17 Spaform Ltd Swimming pool having circulating water flow

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2313835A1 (es) * 2007-04-18 2009-03-01 Enia Tecnica Y Gestion, S.L. Dispositivo de natacion estatica y conjunto de partes para su construccion.
GB2456763A (en) * 2008-01-22 2009-07-29 Nicholas Brian Littleton Swimming pool for continuous swimming
GB2456763B (en) * 2008-01-22 2009-12-02 Nicholas Brian Littleton Swimming pool for continuous swimming in a small area
WO2014071536A1 (fr) * 2012-11-12 2014-05-15 Mueller Peter A Système réglable pour nage à contre-courant
US9855479B2 (en) 2016-01-29 2018-01-02 Watkins Manufacturing Corporation Swimming system current generator
CN107795157A (zh) * 2016-08-31 2018-03-13 朱旭东 混合流及逆流式游泳池施工工艺
FR3106500A1 (fr) * 2020-01-28 2021-07-30 Laurent HEQUILY Installation à vagues artificielles dynamiques pour la pratique du surf
WO2021152263A1 (fr) * 2020-01-28 2021-08-05 Hequily Laurent Installation à vagues artificielles dynamiques pour la pratique du surf
WO2023280375A1 (fr) * 2021-07-05 2023-01-12 Thilo Trefz Cellule de pompe pour une installation de surf mobile comprenant une pompe radiale et un diffuseur

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