Device and method for generating a standing wave

Abstract

The invention relates to a device (1), and a method, for generating a stationary wave (100), comprising a structure (2) forming a basin (3) with a height (B) of water, generating a gravity flow from upstream to downstream, and successively connected several zones with pumping means (40), a channel (50) with an opening (51) for the discharge of a section (S), means for closing the section (S), a wave formation zone (100) with a maximum crest height (H) (102), an inclination (P) of the slope (103), a length (L), a thickness (E) of a water mattress at the foot of the wave (101); and means of managing said wave (100) by combined control of: the water height (B) of said basin (3), the power of the pumping means (40), and the closure of the discharge section (S), as a function of said water height (B) and said power. Figure for the abbreviation: Fig. 3

Description

Title of the invention: Device and method for generating a standing wave. Technical field of the invention

[0001] The present invention falls within the aquatic field of the artificial generation of water currents and waves, and specifically aims at the generation of a standing wave.

[0002] It should be noted that, for the purposes of this invention, the term "standing wave" or "static wave" refers to a deformation of the water surface, without propagation, and which is therefore localized to a specific location. Such a standing wave forms due to the flow of water encountering a quantity of water known as "tail water," causing a slowing of the flow and generating a hydraulic jump phenomenon.

[0003] The wave height thus generated can be increased by the presence of a protruding obstacle, as well as by other parameters, such as the flow slope and the cross-section through which the water flows. Thus, the crest of the standing wave remains substantially in the same location under constant marginal conditions, such as, for example, a defined flow velocity and obstacle height. The generation of a standing wave is therefore regular and continuous. Such a standing wave is preferably of the river type.

[0004] On a stationary wave, it is preferably possible to practice various water sports and leisure activities, such as surfing, for example using a surfboard or a bodyboard, or even a kayak, or inflatable flotation devices, such as a buoy. State of the art

[0005] Currently, the generation of a standing wave can be achieved artificially through a dedicated device, comprising a structure designed to be floating or installed within a watercourse or body of water, or even independently, like a swimming pool. The structure is designed to be floating and partially submerged, in order to be supplied with water from said watercourse or body of water.

[0006] Such a structure forms a superior wave basin with an upstream end and a downstream end, connected together, so as to generate a flow of water in a longitudinal direction from said upstream end to said downstream end.

[0007] In particular, the upstream end has a relative elevation with respect to the downstream end, ensuring a gravity flow, namely under the effect of the force of gravity. In addition, this elevation imparts potential energy at the upstream end, which is transformed into kinetic energy during the flow of the flux in the longitudinal direction from the top upstream to the bottom downstream. Furthermore, at the downstream end, the basin stores a quantity of water, forming tail water, the encounter of which with the flow leads to the generation of the standing wave under the effect of a hydraulic jump.

[0008] To do this, a known device comprises several zones, namely successively at least one supply zone, one discharge zone, one flow zone, one wave formation zone and one filtration zone located at the downstream end.

[0009] Regarding the supply zone, it includes a water supply from a natural source, such as a watercourse, like a stream or river, or a body of water, notably by means of pumping. This supply zone is configured to supply a flow of water to the areas located downstream.

[0010] Regarding the discharge zone, it opens into the basin and ensures the discharge of water at the upstream end. This discharge also helps to calm the water, namely to reduce turbulence from the feed, in order to deliver a continuous and regular flow of water that is at least partially laminar.

[0011] Regarding the flow zone, it comprises a flow surface located downstream and provided with at least one ramp, essentially flat. Furthermore, said ramp is inclined in a decreasing manner along the longitudinal direction.

[0012] The ramp thus gives the water flow a laminar character, namely that the flow occurring against the surface of the ramp follows, outside of a laminar or turbulent boundary layer, a path along said surface without breaking or becoming agitated. Furthermore, laminar flow is a movement, particularly of water, in which little or no visible turbulence occurs.

[0013] It should be noted that, for the purposes of the invention, a surface is said to be "plane" when it lies between two imaginary parallel planes separated by a distance of approximately 0.15 mm (millimeter) to approximately 10 cm (centimeters), preferably from approximately 0.15 mm to approximately 5 cm, and more preferably from approximately 0.15 mm to approximately 3 cm. Furthermore, along a plane surface, the flatness tolerance between several points of said surface on either side of an imaginary longitudinal median plane is within the aforementioned intervals, preferably plus or minus 1 cm with respect to said point.

[0014] Regarding the wave formation zone, it includes a through obstacle extending transversely with respect to the longitudinal direction. Such an obstacle is provided in projection relative to the flow surface and is located adjacent downstream of the ramp, in its continuity through an interface, with a curved profile, so as to form a springboard in order to generate a standing wave after said obstacle, in continuity with the ramp.

[0015] In particular, said obstacle may include a deflector, with a determined geometric profile and angle of attack, in order to generate a standing wave with corresponding characteristics.

[0016] Furthermore, such a deflector can be made adjustable, with a step-off edge on the obstacle surface between the upstream and downstream sides, in order to modify the characteristics of the generated wave. For example, increasing the angle of the deflector relative to the flow direction increases the wave height, and vice versa.

[0017] Regarding the filtration area, it includes a filtration surface, provided with one or more openwork walls, in the form of a grid or mesh, with dimensions adapted to retain any object and ensuring the safety of users by keeping them inside the pool.

[0018] In particular, the filtration surface is provided to increase along the longitudinal direction up to the downstream end, then acting as a beach to allow users to exit the pool.

[0019] In addition, said filtration zone extends so as to soothe or calm the water flow, after the standing wave formation zone.

[0020] According to an open configuration of the device, the filtration zone can open onto the aquatic surface of a body of water or a natural flow.

[0021] According to another closed configuration, the filtration zone may include a downstream wall delimiting the basin. The device then incorporates a suction zone in order to recycle the water flow upstream, towards the supply zone.

[0022] In this case, the device structure includes at least one return channel, separate from said basin and connected to the suction zone communicating with the filtration zone, allowing the return of water from downstream to upstream via said pumping means. The channel(s) are located below the basin or on its sides, and thus connect the suction zone to the supply zone.

[0023] According to various existing embodiments, the pumping means can be located at the supply zone, the suction zone, and / or along each return channel. Furthermore, under the action of the pumping means, each channel can then form a pressurized conduit.

[0024] Furthermore, the pumping means are adapted to ensure the raising of a column of water to the upstream end, for discharge through the evacuation zone. The pumping means therefore ensure reverse circulation within said device.

[0025] That being said, known devices include a supply zone communicating with an evacuation zone in the form of a chamber configured to straighten the flow, namely to limit its turbulence and to conform it at least partly in a laminar manner, in particular by distributing the water flow equally over the entire width of the basin's flow zone.

[0026] According to one configuration, the chamber is provided open at the top, forming a diffuser of the water that supplies it, in the manner of a retention basin, allowing to calm the turbulence.

[0027] According to another configuration, the chamber can be open upstream or laterally, supplied by water from the watercourse.

[0028] According to another configuration, the chamber is provided closed, supplied via the return channel under the action of the pumping means and returning the water towards an evacuation opening leading to the flow zone.

[0029] Further on, at the level of the evacuation zone, the chamber can be provided downstream with a guide channel, constituting a straightener of the water flow, whose geometric profile and arrangement, in particular the inclination, make it possible to straighten the flow and conform it at least partly in a laminar manner, in order to discharge it upstream towards the ramp.

[0030] In particular, the height of a water column is at least high enough to apply a sufficient mass to generate a flow towards the channel. This channel is provided with a decreasing height from upstream to downstream, directing the flow towards the discharge opening, essentially in the longitudinal direction, where the water flow is discharged towards the ramp in the longitudinal direction.

[0031] Furthermore, the operation of such a device is carried out by a pressurization, namely that a sufficient mass of water is pumped into the chamber and forms the column sufficient for the water flow to be evacuated, causing a siphon effect, which partially maintains the circulation of the flow through the pumping means.

[0032] Furthermore, several guide plates can be arranged within said channel, across its entire cross-section. These plates can be arranged horizontally, vertically, and / or inclined. They can be parallel and / or orthogonal to each other, as well as to the channel wall, so as to form a grid and separate the water flow into different layers as it passes through this arrangement of plates. They can also be inclined relative to each other, forming an angle, the relative inclination of which is determined to straighten the flow and reduce turbulence.

[0033] At the level of the drainage opening, the drainage area is equipped with a rim to divert the water flow towards the discharge area. Such a rim may, in particular to be shaped in the form of an offset or offset, directed downwards, forming a step.

[0034] Furthermore, the discharge opening can be fitted at the top with a vertically arranged blade. Said blade includes a straight or beveled lower edge, allowing the top of the water flow to be smoothed, delivering a flow that will flow laminarly along the ramp of the flow zone.

[0035] Furthermore, such a blade can be made adjustable, particularly vertically or rotationally, in order to influence the delivered water flow. In particular, said vertically movable blade allows the quantity of water delivered through the discharge opening to be managed by increasing or decreasing the height of the opening, or even by lowering it to close the discharge opening, particularly when the device is being pressurized.

[0036] That being said, one problem with existing devices lies in their fixed configuration, with fixed dimensions of the structure and the different zones, making it complex to generate waves of variable sizes, in particular to adapt to different levels of user practice.

[0037] In particular, the degree of inclination of the ramp is fixed, forming an integral part of the structure, preventing it from being modified to impact the generated wave due to a higher or lower slope.

[0038] Therefore, known devices use a change in the power of the pumps, to increase or decrease the water flow from the supply, proportionally impacting the flow rate and respectively increasing or decreasing the wave height.

[0039] However, the increased flow rate results in a high laminar flow velocity along the ramp, but especially at the wave foot before the wave forms under the effect of the obstacle. This high velocity at the wave foot creates a dense and fast-moving cushion of water, which makes any maneuver by a user more difficult.

[0040] As mentioned previously, one solution is to adjust the profile and angle of attack of the obstacle deflector. However, this adjustment must be extremely precise and makes it complex to manage in conjunction with the variation in pump power and, proportionally, the flow rate.

[0041] Moreover, this submerged moving part is subjected to enormous mechanical stresses, drastically reducing its lifespan and requiring costly regular maintenance in terms of time and money.

[0042] Furthermore, it has been observed that the laminar flow along the ramp, directly followed by the obstacle, forms a curvature at the wave foot, making it difficult to practice certain water sports. In particular, when surfing, the The nose of the board is close to the ramp, with a very low height above the water surface, often causing the user to fall when the nose touches the surface of the flowing water. Description of the invention

[0043] The invention aims to overcome the drawbacks of the prior art by proposing an improved generation of a stationary wave, allowing the characteristics of said wave to be shaped, in particular to adapt it to different levels of practice of users, according to their age, their morphologies and physical capacities, their skills, but also their equipment, namely the types of boards.

[0044] To achieve this, the invention provides for modifying the water level in the basin, particularly in an area located downstream of the generated wave, such as the filtration or suction zone. This modification of the water level makes it possible to adjust the tail water, impacting the hydraulic jump, which in turn allows, in particular, the management of the inclination of the generated wave as it passes over the obstacle.

[0045] In addition, depending on the water level, the power of the pumps is adapted to deliver a determined water flow towards the outlet.

[0046] Depending on the pump flow rate, the blade height is configured to specifically close the discharge opening. The blade then allows, in addition to smoothing the discharged flow, for upstream control directly at the discharge point of the quantity of water discharged, thereby modifying downstream the thickness and velocity of the water in the water mattress at the base of the wave.

[0047] Thus, by managing these parameters, the invention makes it possible to act on several characteristics of the stationary wave generated, ensuring the formation of several types of waves, in particular four categories corresponding to several different levels of user practice, from a beginner level to a confirmed competitor level.

[0048] Furthermore, by eliminating the need for a deflector at the obstacle, the invention provides an obstacle with only a fixed edge of its detachment edge, simplifying the parameterization of the generated wave, but above all eliminating the need for maintenance of a moving and submerged part, while making the practice safer for users.

[0049] In combination, the invention provides for increasing the interface between the ramp and the obstacle, in the form of a specific elongation, increasing the length of the water mattress and the foot of the wave, while maintaining a flow velocity suitable for the practice, regardless of the characteristics of the wave generated.

[0050] According to a first aspect, the invention relates to a device for generating a standing wave, comprising a structure forming a wave basin with an upstream end and a downstream end connected together, the upstream end having a relative elevation with respect to the downstream end, so as to generate a gravity flow of water in a longitudinal direction from said upstream end to said downstream end; said structure being closed by a downstream wall and said basin having an internal volume filled with a height of water; said structure comprising, successively linked from upstream to downstream, at least: - a water supply zone equipped with pumping means delivering a water flow determined according to the power of said pumping means; - an evacuation zone with a channel communicating with said supply zone, said channel having an evacuation opening with a discharge section: i) said channel comprising a geometric profile ensuring guidance of the flow delivered by the pumping means, and at the level of the evacuation opening, a straightener in the form of an arrangement of guide plates according to a specific arrangement, shaping the water flow in at least partially laminar form; ii) said discharge opening including means for at least partially closing its discharge section; - a flow zone in the form of a ramp extending from the evacuation opening in an inclined and decreasing manner along said longitudinal direction, said ramp generating a laminar flow; - a wave formation zone connected to said ramp at an interface and provided with a vertically projecting obstacle, forming a springboard for generating a stationary wave extending in the longitudinal direction from a wave foot to a crest, with characteristics chosen from at least; a) a maximum peak height; b) an inclination of the slope; c) a length; d) a thickness of a water mattress located at the level of the vagrant foot. - a filtration zone connected to the wave formation zone behind the obstacle and provided with at least one perforated wall inclined in an increasing manner along said longitudinal direction; - a suction zone communicating at least partially under the filtration zone and connected to the supply zone through a return channel under the action of the pumping means; characterized in that it includes - means of managing the characteristics of said wave through combined control of: j) the water level of said basin; jj) the power of the pumping equipment; jjj) the sealing of the discharge section of the evacuation opening according to said water height and said power.

[0051] According to additional features, the device includes at the level of said downstream wall, at least one ballast with an internal volume and equipped with means for transferring a quantity of water from the internal volume to said basin, and vice versa.

[0052] According to one embodiment, said sealing means comprise at least one blade mounted movable vertically, from a low position of sealing the evacuation opening to a high position, via intermediate positions, and vice versa.

[0053] Furthermore, said management means ensure a degree of closure of the discharge section of the discharge opening proportional to the power of the pumping means, for a determined water flow delivered by said pumping means, by controlling the vertical position of said blade.

[0054] According to one embodiment, said interface is provided to be flat and extends horizontally or substantially horizontally between the ramp and the obstacle; said interface forming an extension of a water mattress of the laminar flow located at the level of the wave foot.

[0055] According to one embodiment, said interface has a length between 40 cm and 3 m, preferably a length between 60 cm and 2 m.

[0056] According to a second aspect, the invention also relates to a method for generating a standing wave, comprising at least the following steps: - a flow of water is circulated within a basin with a water height, in a longitudinal direction from upstream to downstream, by supplying it by means of a pump delivering a flow of water to a channel with a flow rate determined according to the power of said pump; - the said water flow is guided along the channel with a geometric profile and guide plates, so as to form a water flow that is at least partly laminar and sent towards an outlet opening with a spillway section; - at the level of said drainage opening, said water flow is smoothed superiorly by means of a blade closing the discharge section of said drainage opening; - after said drainage opening, said water flow flows at least by gravity and in a laminar manner along a ramp inclined in a decreasing manner along said longitudinal direction; - a standing wave is formed at the level of an obstacle connected to said ramp via an interface, said obstacle being vertically salient relative to said ramp, said wave having a wave foot and a crest, as well as characteristics chosen from: a) a maximum peak height; b) an inclination of the slope; c) a length; d) a thickness of a water mattress located at the level of the vagrant foot; - the water flow after the wave is drawn in and sent back upstream; characterized in that - The characteristics of said wave are managed by combined control of: j) the water level of said basin; jj) the power of the pumping equipment; jjj) the sealing of the discharge section of the evacuation opening according to said water height and said power.

[0057] According to additional, non-limiting features, the water height of said basin is modified by means of an internal volume of a ballast and by transferring a quantity of water from the internal volume of said ballast to said basin, and vice versa.

[0058] According to one embodiment, said transfer of said quantity of water from the internal volume of said ballast to said basin, or vice versa, is carried out over a period of less than 2 minutes.

[0059] According to one embodiment, a degree of closure of the discharge section of the evacuation opening is managed proportionally to the power of said pumping, for a water flow determined by said pumping, by controlling a vertical position of the movable blade mounted to close the evacuation opening. According to one embodiment, the channel is filled by combined control of: j) the pumping power; jj) of the sealing of the discharge section of the discharge opening and then, once filled, the quantity of water discharged from said channel is managed by control at least jjj) of the increase in the spillway section of the discharge opening.

[0060] Preferably, the method can enable the implementation of the device to generate a standing wave according to the invention.

[0061] Other advantageous embodiments will become apparent from the following description, the figures, and the dependent claims. The various features of the described embodiment are not limited to that embodiment but can be combined with each other and with other features to create other embodiments. Drawings

[0062] Other features and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments of the invention, with reference to the accompanying figures, in which:

[0063] [Fig. 1] schematically represents a perspective view of an embodiment of a device for generating a standing wave;

[0064] [Fig.2] schematically represents a view along a longitudinal vertical section of an embodiment of the device, for a first water height in the basin, highlighting in particular different areas of the structure and the circulation of the water flow within said device;

[0065] [Fig.3] schematically represents a view along a vertical section of another method of embodiment of the device, equipped with a ballast, for a second lower water height in the basin;

[0066] [Fig.4] schematically represents a view along a vertical section in superposition of standing waves of different levels of practice;

[0067] [Fig.5] schematically represents a view along a vertical cross-section of a wave stationary generated within the device, notably highlighting different characteristics of said wave;

[0068] [Fig.6] schematically represents a perspective view of an embodiment, showing, in particular, part of the feeding area equipped with a box and a cone; and

[0069] [Fig.7] schematically represents a view along a vertical section of a mode corresponding realization, showing in particular the supply area equipped with a vertical pump with under an inlet a box with a cone, as well as the evacuation area. Detailed description

[0070] As a preliminary matter, it should be noted that, for the purposes of the present invention, the terms "before," "after," and "behind" are to be understood with respect to a longitudinal flow direction AA', namely, from upstream to downstream. Indications of relative position, such as "above" and "below," are to be understood, unless otherwise specified, vertically, that is, along the axis of gravity. The term "horizontal" or "horizontally" is to be understood as orthogonal to said vertical axis of gravity. Indications of relative position, such as "right" and "left," are to be understood, unless otherwise specified, laterally on either side along the longitudinal direction from upstream to downstream.

[0071] The term "transverse" means, unless otherwise indicated, in a direction orthogonal to the longitudinal direction AA' and horizontally or substantially horizontally.

[0072] The "height" extends along the direction of the axis of gravity.

[0073] The "width" extends transversely, namely perpendicularly to the axis of gravity and perpendicular to the direction of flow, namely horizontally and perpendicular to the longitudinal direction.

[0074] The "length" extends along the longitudinal direction.

[0075] That being said, the invention aims at the generation of a stationary wave 100, hereinafter "wave 100", by putting into circulation and by flow of a flow of water from upstream to downstream, until it meets a quantity of water, called "tail water", forming said wave 100 under the effect of a hydraulic jump phenomenon.

[0076] A wave 100 thus generated has a waveform, extending from a low point forming a wave foot 101 to a high point forming a crest 102, with a slope 103 extending from the wave foot 101 and said crest 102 from an increasing change in the flowing water surface.

[0077] Such a wave has several characteristics, some of which, within the scope of the present invention, are selected from among: a) a maximum crest height H 102, extending vertically between the surface of the wave foot 101 and the crest 102; b) an inclination P of the slope 103, namely at an angle to the horizontal; c) a length L, extending between the beginning of the slope 103 (i.e. the end of the foot of the wave 101) and the crest 102; d) a thickness E of a water mattress located at the level of the ripple foot 101, namely a distance extending vertically from the surface along which the water flows to the flowing water surface.

[0078] It should be noted that the aforementioned characteristics can be considered based on average values ​​over a given period of time, or in relation to a maximum value. These values ​​can be measured or estimated.

[0079] Furthermore, the inclination P of the slope 103 can be expressed as a degree of inclination, namely a ratio between the length L of the wave 100 and the maximum height H of the crest 102. This inclination P of the slope 103 can be considered as an average or by taking the maximum value.

[0080] A representation of these characteristics is in particular visible in [Fig.5].

[0081] According to a first aspect, the invention relates to a device 1 for generating a stationary wave 100.

[0082] Such a device 1 comprises a structure 2 forming a wave basin 3 100 at its upper end, with an upstream end 30 and a downstream end 31 connected to each other. Furthermore, the upstream end 30 has a relative elevation with respect to the downstream end 31, namely that the upstream end 30 is higher than the downstream end 31 in a given frame of reference.

[0083] Such a configuration makes it possible to generate a gravity flow of water in a longitudinal direction AA' from said upstream end 30 to said downstream end 31, due to the difference in elevation between the ends 30,31.

[0084] Further on, said structure 2 is provided to be closed by a downstream wall 20. In other words, downstream, the water does not exit structure 2 from the rear.

[0085] In addition, the structure 2 also includes other walls, such as an upstream wall 21 closing the upstream end 30 and lateral walls 22 closing each side, as well as a bottom wall 23. These walls 20, 21, 22, 23 delimit at least in part said basin 3, open at the top, which has an internal volume intended to be filled with a quantity of water, defining a height B of water within said basin 3. Such a height B of water of the basin 3 is understood to be vertically from a point of the structure 2 to the surface of the water.

[0086] According to various embodiments, said structure 2 may be provided as floating or installed within a watercourse or body of water, of the "outdoor" type, or even installed independently, of the "indoor" type. In particular, the structure 2 may be provided as floating and partially submerged, for the purpose of supplying it with water from said watercourse or body of water.

[0087] A representation of different water heights B of basin 3 is notably visible in figures 2 and 3.

[0088] Further on, said structure 2 comprises several zones connected successively from upstream to downstream. These zones perform various functions in the circulation of the water flow, its flow, and also its recycling. These zones are among the following, described in a non-limiting manner.

[0089] Upstream, located at the upstream end 30, structure 2 includes a water supply zone 4, which provides water to device 1, with a quantity of water ensuring the filling of basin 3, as well as other zones. Additional water can also be supplied during the operation of device 1 to maintain a sufficient quantity of water, and to modify this quantity as needed.

[0090] As mentioned previously, such a water supply can be obtained from a natural source, such as a body of water or a watercourse, or from a water supply network. The supply zone 4 then includes suitable means ensuring the water supply from said source or from said network.

[0091] In addition, the supply zone 4 ensures at least in part the circulation of the water flow within the structure 2, as well as the filling of different zones. To achieve this, said supply zone 4 is equipped with pumping means 40 delivering a water flow determined according to the power of said pumping means 40.

[0092] In particular, the pumping means 40 include one or more pumps 41 located at said supply zone 4, as well as possibly other pumps located within other zones of structure 2.

[0093] According to one embodiment, the pumping means 40 comprise five pumps 41 distributed transversely in a single row along the width of the supply zone 4 of the structure 2. In particular, the five pumps 41 are distributed to pump a flow of water sufficient to generate a wave over a width of approximately 10 m (meters) within the device 1.

[0094] Further on, the pumps 41 are arranged and oriented vertically, ensuring vertical pumping from an inlet 410 from a lower suction chamber 42 to an outlet 411 opening into the upper supply zone 4.

[0095] In particular, each of the pumps 41 is provided with technical specifications, including a determined suction width, in particular a suction width of at least 2.4 m. Given that the device 1 is dimensioned in relation to the 10 m width of the wave to be generated, the invention provides for an optimization of the suction chamber 42, making it possible to limit to 2 m the suction width dedicated to each pump 41, while ensuring the proper functioning of each of the pumps 41.

[0096] To this end, said suction chamber 42 includes, at the inlet 410 of each of the pumps 41, a design shaped to increase the circulation of pumped water. According to one embodiment, said suction chamber 42 includes a box 420 under each of the pumps 41, said box 420 delimiting a space under each inlet 410. Several boxes 420 thus divide the suction chamber 42.

[0097] Furthermore, such a casing 420 has a vertical or substantially vertical wall extending straight longitudinally along a first section 421 from downstream to upstream, and then curved along a second section 422. In particular, the second section 422 forms a rounded wall partially surrounding the corresponding inlet 410 on the upstream side. These sections 421 and 422 provide specific guidance within the casing 420 of the flow generated by the pumping of each pump 41, in particular by limiting turbulence and cavitation phenomena. Specifically, the straight shape of the first section 421 directs the flow towards the second section 422, whose curved shape directs the flow in rotation, to correspond with the direction of rotation during operation of the turbine(s) equipping each pump 41.

[0098] Furthermore, each chamber 420 includes at its lower end a cone 423 or truncated cone, centered below the inlet 410 of the corresponding pump 41. Such a cone 423 has a lower base that is wider than its upper apex. The conical shape of the cone 423 ensures specific, swirling guidance, combined with the flow guided in rotation by the second curved section 422. In particular, the shape of the cone 423 guides the pumped flow along a three-dimensional spiral that narrows from the bottom upwards to the inlet 410 of said corresponding pump 41.

[0099] In addition, in order to improve circulation within each chamber 420, the suction chamber 42 includes a ceiling 424 decreasing from downstream to upstream, in particular at least along the first section 421 of said chamber 420.

[0100] Such a design of the suction chamber 42 with its box 420 and its cone 423 is shown in figures 6 and 7.

[0101] Thus, the pumping means 40 and the particular design of the suction chamber 42 make it possible to reduce the size of the structure 2, with a limited number of pumps 41, compared to installations requiring a larger number of pumps, distributed over one or more rows, requiring larger dimensions of the structure 2, to generate a wave which has an approximate or substantially identical width.

[0102] According to the invention, the structure 2 further comprises a discharge zone 5, ensuring the discharge of a water flow from the supply zone 4 downstream. This discharge zone 5 includes a channel 50 communicating with said supply zone 4. In short, the channel 50 is connected to the outlet 411 of each of the pumps 41. Moreover, said channel 50 extends over the entire width of the structure 2.

[0103] Furthermore, said channel 50 has a discharge opening 51 with a discharge area S. In particular, said discharge area S corresponds to the height of said discharge opening 51 and extends vertically or substantially vertically from a lower wall 52 of said channel 50 to a maximum of an upper wall 53. This discharge area S is capable of being reduced, in particular by suitable means, as described below.

[0104] Furthermore, said channel 50 includes a geometric profile ensuring guidance of the flow delivered by the pumping means 40. In particular, the profile of the channel 50 is designed to converge from upstream to downstream, namely from the outlet 411 of each of the pumps 41 towards the discharge opening 51, thereby reducing the vertical cross-section. This reduction in the height of the channel 50 allows for a gradual decrease in the turbulence generated at the outlet 411 of the pumps 41, in order to redirect the flow along the longitudinal direction A-A'.

[0105] In addition, preferably, the lower wall 52 is decreasing, forming a slope, improving the flow by gravity from said outlet 411 to the discharge opening 51.

[0106] A representation of the geometric profile and reorientation of the flow along channel 50 is visible in [Fig.7].

[0107] Said channel 50 further includes, at the level of the discharge opening 51, a straightener 54 in the form of an arrangement of guide plates 540 according to a specific arrangement, shaping the water flow in at least partially laminar fashion.

[0108] According to one embodiment, the guide plates 540 form a mesh, extending along the longitudinal direction A-A', through which the water flow passes. Such a mesh may comprise an arrangement of plates extending horizontally or substantially horizontally, preferably inclined, along a determined slope, in particular parallel to one and / or the other of the walls 52, 53 of the channel 50. Consequently, the guide plates 540 separate the water flow passing through them into different layers.

[0109] In addition, said mesh may include other plates 541 extending vertically, allowing the flow to be directed laterally and serving in particular as spacers for the guide plates 540 and improving the structural rigidity of the entire rectifier 54 over the width of the device 1.

[0110] Such a configuration of the rectifier 54 is notably visible in [Fig.6].

[0111] Further on, said evacuation opening 51 includes means for closing at less partial of its S spillway section.

[0112] According to one embodiment, said sealing means comprise at least one blade 510 mounted movable from a low position of sealing the discharge opening 51 to a high position, via intermediate positions, and vice versa. In particular, in the low position, the blade 510 completely seals the discharge opening 51. In the high position, the blade 510 is flush with the upper wall 53 of the channel 50, or protrudes below it. Furthermore, in the high position, as well as in intermediate positions, the lower edge of the blade 510 smooths the surface of the discharged water, improving the laminar flow thus imparted.

[0113] According to one embodiment, said blade 510 is mounted vertically, namely through a vertical or substantially vertical translation. The raising or lowering of said blade 510 according to the different positions determines the degree of occlusion of the discharge opening 51, modifying its discharge cross-section S.

[0114] According to another embodiment, said blade 510 is mounted to rotate freely, namely in different angular positions, from the vertical corresponding to the lower position when the evacuation opening 51 is closed, up to a position extreme angular corresponding to the high position, in particular at 90°, preferably in alignment and continuity with the upper wall 53 of the channel 50, via the intermediate positions, and vice versa.

[0115] Thus, said movable blade 510, through its different positions, allows the obturating of the section of the evacuation opening 51 to be managed and, proportionally, the quantity of water flowing downstream.

[0116] According to the invention, the structure 2 further comprises a flow zone 6 in the form of a ramp 60. Said ramp 60 extends from the discharge opening 51 in an inclined and decreasing manner along said longitudinal direction A-A'. In other words, the ramp 60 forms a descending floor on and along which the water discharged from said discharge opening 51 flows. Therefore, in operation, said ramp 60 generates a laminar flow, due to the control of the closure of the discharge opening 51, as well as the upstream straightener 54.

[0117] The structure 2 further includes a wave formation zone 7 connected to said ramp 60 at an interface 8. It is within this formation zone 7 that the laminar flow from the ramp 60 transforms into a stationary wave 100.

[0118] To achieve this, the wave formation zone 6 is provided with a vertically projecting obstacle 70, namely that it protrudes from the upper face of the interface 8. This obstacle 70 therefore forms a springboard for generating the wave 100.

[0119] Furthermore, said obstacle 70 is formed solely and integrally by the wall of the training zone 7, at the level of an offset or recess extending downwards from a maximum height, in particular vertically or substantially vertically, providing an edge to said springboard. In other words, the obstacle 70 is devoid of any moving element at its distal end, limiting the risk of injury and eliminating the need for maintenance of such a submerged element.

[0120] As mentioned previously, said wave 100 thus generated extends along the longitudinal direction A-A'. Furthermore, said wave 100 extends from its wave foot 101 located at the junction between the interface 8 and the obstacle 70, in particular from an inflection point corresponding to the beginning of the protrusion of said obstacle 70, to a crest 102 located behind and downstream of said obstacle 70.

[0121] Furthermore, as mentioned previously, wave 100 includes several features, some of which are chosen from at least; a) a maximum peak height H of 102; b) an inclination P of the slope 103; c) a length L; d) a thickness E of a water mattress located at the level of the wave foot 101.

[0122] Regarding interface 8, connecting the bottom of ramp 60 to obstacle 70, it maintains a laminar flow while preserving the characteristics of the generated wave 100. In particular, interface 8 maintains a thickness E of the water mattress at the base of the wave 101 over a predetermined length, thus facilitating the user experience, notably by increasing the space between the nose of the board and the water surface flowing along ramp 60 and / or along interface 8.

[0123] According to one embodiment, said interface 8 is provided to be flat and extends horizontally or substantially horizontally between the ramp 60 and the obstacle 70. Said interface 8 then forms an extension of the water mattress of the laminar flow at the level of the wave foot 101.

[0124] In particular, the length of the interface 8 is at least sufficient to provide said space between the nose of the board and the surface of the water, but also at most to ensure the continuity of the flow of the stream, while maintaining its laminar character, in order to generate the wave 100 then downstream at the level of the obstacle 70. According to a preferred embodiment, said interface 8 has a length between 40 cm and 3 m, preferably a length between 60 cm and 2 m.

[0125] According to one embodiment, as seen in Figures 1 to 3, the structure 2 may include a platform 71, located downstream after the obstacle 70. Such a platform 71 extends horizontally or substantially horizontally, over a determined length intended to be sufficient for the formation of the wave 100, in particular from said obstacle to its crest 102.

[0126] Furthermore, the platform 71 forms a floor at this level of the basin 3, located above the bottom 23 of the structure 2. Such a floor provides a corresponding volume to contain a quantity of water forming the tail water, necessary for creating the hydraulic jump phenomenon. In addition, this floor improves user safety by offering a limited water depth at this level of the basin 3, despite the turbulence following wave 100 and its speed; this limited water depth is sufficient to reduce the risk of impacts or collisions to users in the event of a fall.

[0127] According to the invention, the structure 2 further comprises a filtration zone 9 connected to the wave formation zone 7 behind the obstacle 70 and provided with at least one perforated wall 90.

[0128] This perforated wall 90 serves as a filtration surface, in the form of one or more grids or mesh, with dimensions adapted to retain any object and ensuring the safety of users by keeping them inside the basin 3. Furthermore, the openwork design of wall 90 is also determined to soothe or calm the water flow after wave formation zone 7, 100. In other In terms of dimensions, the sizing of the openings made within the 90 perforated wall reduces the turbulence of the water flow when it passes through it.

[0129] Furthermore, said perforated wall 90 is inclined in an increasing manner along said longitudinal direction A-A4, namely that it rises after the obstacle 70 from upstream to downstream, up to said downstream wall 20. Thus, the inclined wall 90 allows users to easily exit the pool 3, said downstream wall 20 then acting as a beach, like the surroundings of a swimming pool.

[0130] According to a corresponding embodiment, said perforated wall 90 rises from the downstream end of the platform 71.

[0131] According to the invention, the structure 2 further comprises a suction zone 10 communicating at least partially under the filtration zone 9 and connected to the feed zone 4, through a return channel 11 under the action of the pumping means 40. In other words, the return channel 11 extends under the floor formed by the other zones 5, 6, 7, 8, and communicates at the downstream end 31 with the filtration zone 9, under the perforated wall 90, as well as at the upstream end 30 with the feed zone 4, in particular the feed chamber 42.

[0132] According to one embodiment, the channel 11 has one or more pipes, preferably under pressure, due to the suction of the pumping means 40 located on the upstream side at the level of said suction chamber 42.

[0133] According to a corresponding embodiment, the return channel 11 is located in the extension and opens at the level of the box 420, in particular at the level of its first section 421.

[0134] Thus, channel 11 ensures the return of water from downstream to upstream, under basin 3, in order to supply water via supply zone 4, discharge zone 5 and other downstream zones.

[0135] Such a return path is represented in particular in a global way in figures 2 and 3.

[0136] Advantageously, the invention provides for shaping said wave 100, by modifying its characteristics, in particular to adapt it to different levels of user practice.

[0137] To achieve this, the device 1 includes means for managing the characteristics of said wave 100 by combined control of several parameters, including: j) the water height B of said basin 3; jj) the power of the pumping means 40; jjj) the sealing of the discharge section S of the evacuation opening 51 according to said water height B and said power.

[0138] It should be noted that the water height B of basin 3 can be determined from a wall of structure 2, such as the bottom 23, or in relation to basin 3, in particular in relation to the surface of platform 71 in the corresponding embodiment.

[0139] Figures 2 and 3 show a water height B of basin 3 determined in relation to the surface of said platform 71.

[0140] Thus, by managing the aforementioned parameters together, it is possible to impact the characteristics of the generated wave 100.

[0141] Figure 4 shows several superimposed examples of waves 100 with different characteristics, each adapted to a different user practice. In particular, from bottom to top, a first wave 110 has a flattened curvature, with a low maximum height H, suitable for beginner users; a second wave 111 has a similar profile, with a greater maximum height H, for beginner to advanced users; a third wave 112 has a thicker water surface and a greater length L, with a less pronounced slope P 103, particularly for artistic practice, such as freestyle; a fourth wave 113 has a significant length L, with a steep slope P 103 and a maximum height H, for expert users and sports training.

[0142] Further, management is carried out by synchronously and appropriately controlling the aforementioned parameters, in order to modify the characteristics of the generated wave 100, according to the needs.

[0143] Firstly, the water level B of basin 3 can be increased or decreased, impacting the amount of tail water and consequently the hydraulic surge effect. In particular, the water level B of basin 3 can be decreased to a minimum height, below which the circulation of the water flow is no longer ensured within device 1, to a maximum height above which the generated wave 100 and / or the water flow would exit basin 3 and structure 2, or would otherwise exceed the maximum power of the pumping means 40.

[0144] Device 1 is therefore equipped with suitable means, allowing the height B of water in basin 3 to fluctuate.

[0145] According to one embodiment, the internal volume of the basin 3 can be modified by means of movable walls of the structure 2. Thus, by increasing or decreasing the volume of said basin 3, the water height B is proportionally modified.

[0146] Similarly, the internal volume of the basin 3 can be modified by inflatable means located submerged, particularly within the suction zone 10. These inflatable means can be in the form of submerged tubes, namely positioned below the minimum height, in particular inflated by a system of pressurization, particularly with compressed air. Thus, their inflation or deflation reciprocally decreases or increases the internal volume of basin 3 and proportionally the height B of water.

[0147] According to another embodiment, the quantity of water contained within the device 1 can be modified via an external source, with an adapted supply and drainage.

[0148] According to a preferred embodiment, the device 1 comprises, at the downstream wall 20, at least one ballast 12 with an internal volume and equipped with means 13 for transferring a quantity of water from the internal volume to the basin 3, and vice versa. The transfer means may include suitable pumps and piping connecting the ballast 12 to the basin 3.

[0149] Fig. 3 shows a structure 2 equipped with ballast 12 provided within said downstream wall 20.

[0150] Furthermore, depending on the water level B in basin 3, the circulation of the flow within device 1 is affected and must be adjusted. To this end, the management systems provide for controlling the power of the pumping equipment 40.

[0151] In particular, for a higher water height B, it is necessary to increase the flow rate and, consequently, the power of the pumps 41, and vice versa.

[0152] Furthermore, with an adjustable flow rate delivered by the pumping means 40, it is necessary to adapt the quantity of water exiting through the discharge opening 51. In particular, for a higher flow rate corresponding to an increase in the power of the pumps 41, the cross-sectional area S of the discharge opening 51 must be increased proportionally, whereas for a lower flow rate, it must be closed proportionally.

[0153] According to the corresponding embodiment, namely when the device 1 is equipped with the movable blade 510, said control means ensure a degree of closure of the discharge section S of the discharge opening 51 proportionally to the power of the pumping means 40, for a determined water flow delivered by said pumping means 40, by controlling the vertical position of said blade 510. In other words, said control means control the movement of said blade 510 between its positions, to increase or decrease the discharge section S, relative to the flow delivered by the pumps 41.

[0154] Thus, it is necessary to manage precisely at least the aforementioned parameters in a synchronized and concordant manner, in order to modify the characteristics of the wave 100 thus generated and to retain them for reproducibility over time.

[0155] Alternatively, the management means may be of any type and form, including the integration of hardware or software automation, enabling the control of the various parameters mentioned above, in particular by sending commands to corresponding actuators, for example to control valves present on the means 13 for transferring the ballast 12, cylinders for moving the blade 510, and / or the motorization of the pumps 41 and their power.

[0156] According to another aspect, the invention relates to a method for generating a stationary wave 100.

[0157] Such a process may preferably be provided for the implementation of device 1, according to one and / or the other of the embodiments described above.

[0158] According to the invention, said process comprises several non-limiting steps, as described below.

[0159] According to a first step, a flow of water is circulated within a basin 3 with a water height B, in a longitudinal direction AA' from upstream to downstream, by supplying it by means of a pump delivering to a channel 50 a flow of water with a flow determined according to the power of said pump.

[0160] Preferably, the circulation is carried out from the supply zone 4 by means of pumping 40, from an inlet 410 at the level of the suction chamber 42 to the outlet 411 communicating with said channel 50 of the discharge zone 5.

[0161] According to another step, said water flow is guided along a channel 50 with a geometric profile and guide plates 540, in particular in the form of the straightener 54, so as to form a water flow at least partly laminar sent towards an outlet opening 51 with a discharge section.

[0162] According to another step, at the level of said discharge opening 51, said water flow is smoothed superiorly by means of a blade 510 closing the discharge section of said discharge opening 51.

[0163] According to another step, after said drainage opening 51, said water flow flows at least by gravity and in a laminar manner along a ramp 60 inclined in a decreasing manner along said longitudinal direction A-A'.

[0164] According to another step, a stationary wave 100 is formed at the level of an obstacle 70 connected to said ramp 60 via an interface 8. In particular, said obstacle 70 is vertically salient with respect to said ramp 60, and especially with respect to the upper face of the interface 8.

[0165] As mentioned previously, said wave 100 thus generated comprises a wave foot 101 and a crest 102, as well as characteristics chosen from: a) a maximum height H of crest 102; b) an inclination P of the slope 103; c) a length L; d) a thickness E of a water mattress located at the level of the wave foot 101.

[0166] According to another step, the water flow after wave 100 is drawn in and returned upstream. In particular, the return is carried out through said channel 11, under the action of the pumping means 40.

[0167] Advantageously, the process provides for managing the characteristics of said wave 100 by combined control: j) of the water height B of said basin 3; jj) of the power of the pumping means 41; jjj) of the closure of the discharge section S of the evacuation opening 51 as a function of said water height B and said power. According to one embodiment, the method involves modifying the water level B of said basin 3 by altering the internal volume of the structure 2, in particular by increasing or decreasing the internal volume of said basin 3, notably the internal volume of the suction zone 10. Such a modification of the internal volume of basin 3 can be achieved, in particular, by means of submerged inflatable devices, the inflation or deflation of which respectively reduces or enlarges said volume, proportionally increasing or decreasing the water level B.

[0168] According to a preferred embodiment, the process involves modifying the water height B of said basin 3, by means of an internal volume of a ballast 12 and by transferring a quantity of water from the internal volume of said ballast 12 to said basin 3, and vice versa.

[0169] According to one embodiment, said transfer of said quantity of water is carried out from the internal volume of said ballast 12 to said basin 3, or vice versa, in a limited period of time, preferably over a period of less than 2 minutes.

[0170] According to one embodiment, the degree of occlusion of the discharge section S of the evacuation opening 51 is managed proportionally to the power of said pumping, for a water flow rate determined by said pumping, by controlling a vertical (or angular) position of a blade 510 mounted to articulate and occlude the evacuation opening 51. In short, the position of the blade 510 completely or partially occludes the evacuation opening 51, or even leaves it completely open, modifying its cross-section S and proportionally allowing a corresponding quantity of water to pass through.

[0171] In particular, the degree of occlusion of section S of the discharge opening 51 depends on the flow rate of the pumps 41, i.e., their pumping power. It is therefore necessary to manage the degree of occlusion and the position of the blade 510 according to said flow rate delivered by the pumps 41.

[0172] Furthermore, for a given flow rate, the degree of occlusion of section S of the discharge opening 51, through control of the position of the blade 510, makes it possible to influence on the thickness E of the wave foot mattress 101, as well as the velocity along said wave foot 101, in particular along interface 8.

[0173] In addition, the water height B of basin 3, in particular downstream at platform 71, determines the inclination P of the slope 103 of wave 100, for a given flow rate.

[0174] According to a given configuration of the device 1, in particular a dimensioning of the structure 2 and the pumping means 40, a pumping power makes it possible to obtain a water flow rate of between 10 and 17.5 m3 / s (cubic meters per second).

[0175] Thus, by managing at least the aforementioned parameters in a synchronized and concordant manner, the characteristics of the generated wave 100 are affected in a reproducible way.

[0176] According to another embodiment, when the device 1 is put into operation, a filling of the channel 50 is carried out by combined control of: j) the power of the pumping, namely of the pumping means 40; jj) of the blocking of the discharge section S of the discharge opening 51. In particular, the section S is reduced relative to the flow rate of the pumps 41, to ensure an appropriate filling of said channel 50 by the outlet 411, namely that the flow rate generated by the pumps 41 is greater than the quantity of water discharged through the opening 51.

[0177] Preferably, the sealing of section S is carried out totally, until complete filling of channel 50, as well as of the part located above exit 411.

[0178] Then, once in charge, the quantity of water discharged from said channel 50 is managed by controlling at least the increase in the discharge section S of the discharge opening 51.

[0179] Thus, the pressurization by filling channel 50 creates a storage of potential energy which, under the effect of gravity flow, during discharge through the outlet 51, particularly by raising the blade 510, generates kinetic energy along the ramp 60. Furthermore, this discharge creates a siphon effect, under the action of pumping, which partially maintains circulation within device 1. This siphon effect makes it possible, after pressurization, to reduce the pumping power while maintaining the same water flow rate at the outlet 51, as long as channel 50 remains pressurized. In the event of a decrease in pressure, it is then possible to control the increase in pumping power, while managing the degree of closure of the opening 51, in order to maintain pressurization and circulation along device 1.

[0180] Thus, the invention, through its device 1 and its method for generating a stationary wave 100, and controlling said parameters, makes it possible to modify the characteristics of said wave 100, adapting it to different activities and practices according to the needs and level of different users.

Claims

1. Demands Device (1) for generating a stationary wave (100), comprising a structure (2) forming at its upper end a wave basin (3) with an upstream end (30) and a downstream end (31) connected to each other, the upstream end (30) having a relative elevation with respect to the downstream end (31) so as to generate a gravity flow of water in a longitudinal direction (A-A') from said upstream end (30) to said downstream end (31); said structure (2) being closed by a downstream wall (20) and said basin (3) having an internal volume filled with a height (B) of water; said structure (2) comprising, connected successively from upstream to downstream, at least: - a water supply zone (4) equipped with pumping means (40) delivering a water flow determined according to the power of said pumping means (40); - an evacuation zone (5) with a channel (50) communicating with said supply zone (4), said channel (50) having an evacuation opening (51) with a discharge section (S): i) said channel (50) comprising a geometric profile ensuring guidance of the flow delivered by the pumping means (40), and at the level of the evacuation opening (51), a straightener (54) in the form of an arrangement of guide plates (540) according to a specific arrangement, shaping the water flow in at least partially laminar form; ii) said discharge opening (51) including means for at least partially closing its discharge section (S); - a flow zone (6) in the form of a ramp (60) extending from the discharge opening (51) in an inclined and decreasing manner along said longitudinal direction (A-A'), said ramp (60) generating a laminar flow; - a wave formation zone (7) connected to said ramp (60) at an interface (8) and provided with a vertically projecting obstacle (70), forming a springboard for generating a stationary wave (100) extending along the longitudinal direction (A-A') from a wave foot (101) to a crest (102), with characteristics chosen from at least; a) a maximum peak height (H) (102); b) an inclination (P) of the slope (103); c) a length (L); d) a thickness (E) of a water mattress located at the level of the wave foot (101). - a filtration zone (9) connected to the wave formation zone (7) behind the obstacle (70) and provided with at least one perforated wall (90) inclined in an increasing manner along said longitudinal direction (A-A'); - a suction zone (10) communicating at least partially under the filtration zone (9) and connected to the supply zone (4) through a return channel (11) under the action of the pumping means (11); characterized in that it comprises - means for managing the characteristics of said wave (100) by combined control of: j) the height (B) of water in said basin (3); jj) the power of the pumping means (40); jjj) the sealing of the discharge section (S) of the evacuation opening (51) according to said height (B) of water and said power.

2. Device (1) according to the preceding claim, characterized in that it comprises - at the level of said downstream wall (31), at least one ballast (12) with an internal volume and equipped with means (13) for transferring a quantity of water from the internal volume to said basin (3), and vice versa.

3. Device (1) according to any one of the preceding claims, characterized in that - said closing means comprise at least one blade (510) mounted movable vertically, from a low closing position of the discharge opening (51) to a high position, via intermediate positions, and vice versa; and in that - said control means ensure a degree of closing of the discharge section (S) of the discharge opening (51) proportional to the power of the pumping means (40), for a determined flow rate of water delivered by said pumping means (40), by controlling the vertical position of said blade (510).

4. Device (1) according to any one of the preceding claims, characterized in that said interface (8) is provided to be flat and extends horizontally or substantially horizontally between the ramp (60) and the obstacle (70); said interface (8) forming an extension of a water mattress of the laminar flow located at the level of the wave foot (101).

5. Device (1) according to the preceding claim, characterized in that said interface (8) has a length between 40 cm and 3 m, preferably a length between 60 cm and 2 m.

6. A method for generating a stationary wave (100), comprising at least the following steps: - a water flow is circulated within a basin (3) with a water height (B), in a longitudinal direction (A-A') from upstream to downstream, by means of a pump delivering a water flow with a flow rate determined according to the power of said pump to a channel (50); - said water flow is guided along the channel (50) with a geometric profile and guide plates (540), so as to form a water flow that is at least partly laminar and sent towards a discharge opening (51) with a discharge section (S); - at the level of said discharge opening (51), said water flow is smoothed superiorly by means of a blade (510) closing the discharge section (S) of said discharge opening (51);- after said evacuation opening (51), said water flow flows at least by gravity and in a laminar manner along a ramp (60) inclined in a decreasing manner along said longitudinal direction (A-A'); - a stationary wave (100) is formed at the level of an obstacle (70) connected to said ramp (60) by means of an interface (8), said obstacle (70) being vertically projecting from said ramp (60), said wave (100) having a wave foot (101) and a crest (102), as well as characteristics selected from: a) a maximum crest height (H) (102); b) an inclination (P) of the slope (103); c) a length (L); d) a thickness (E) of a water mattress located at the wave foot (101); - the water flow is drawn after the wave (100) to be sent back upstream; characterized in that - the characteristics of said wave (100) are managed by combined control of: j) the height (B) of water in said basin (3); jj) the pumping power; jjj) the closure of the discharge section (S) of the evacuation opening (51) as a function of said height (B) of water and said power.

7. Method according to the preceding claim, characterized in that the height (B) of water in said basin (3) is modified by means of an internal volume of a ballast (12) and by transferring a quantity of water from the internal volume of said ballast (12) to said basin (3), and vice versa.

8. A method according to the preceding claim, characterized in that said transfer of said quantity of water is carried out from the internal volume of said ballast (12) to said basin (3), or vice versa, over a period of less than 2 minutes.

9. A method according to any one of claims 6 to 8, characterized in that a degree of closure of the discharge section (S) of the discharge opening is managed proportionally to the power of said pumping, for a water flow determined by said pumping, by controlling a vertical position of the blade (510) mounted movable in closure of the discharge opening (51).

10. A method according to any one of claims 6 to 9, characterized in that - the channel (50) is filled by combined control of: j) the pumping power; jj) the closure of the discharge section (S) of the discharge opening (51) and then, once filled, - the quantity of water discharged from said channel (50) is managed by at least jjj) controlling the increase in the discharge section (S) of the discharge opening (51).

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