Wavemaker
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Marine, Naval, Hydrodinamic and OceanographWavemaker for 2D Flumes
Flume wavemakers are normally driven by AC electric servo motors. Very large wavemakers are hydraulically powered.
Flume wavemakers are based on a wet-back design for simplicity and ease of maintenance. All flume wavemakers have active wave absorption fitted as standard.
Electrically powered wavemakers
Piston type wavemakers
For water depths up to 1.5 m the wavemaker is typically a piston type design where the paddle moves backwards and forwards horizontally. The advantage of this type of design is that the stroke is not generally limited, making the piston wavemaker ideal for producing solitary waves, absorbing reflected waves and compensating for long period set down phenomena. For deeper water applications, see our hinge flap type wavemakers below.
Depending upon the width of the flume, the paddle is mounted underneath either one or two electric drive actuators.These actuators are suspended from a structure that spans the flume walls. Alternatively the structure can be free-standing if required. With this arrangement all the bearings and precision components are situated well above the water level.
For more information on the actuators and how our wavemakers are powered and built, download the product brochure.
Hinge flap type wavemakers
This type of wavemaker is best suited to deeper water applications and is often used for ship towing tanks.
The wavemaker comprises a paddle that is hinged either on the bottom of the flume or on a raised supporting structure. The movement of the paddle is limited to approximately ±15 degrees to prevent wave distortion.
Again the design of this wavemaker ensures all of the drive actuation system is kept well above the water level with the use of a flexible belt and quadrant to drive the paddle. For wider flumes and towing tanks a dual actuator is used to achieve the required wave heights. The control system for the hinged flap wavemaker is the same as that for the piston type.Hydraulically powered wavemakers
Hydraulically powered wavemakers are usually of the piston type. The largest wavemaker supplied by HR Wallingford to date was hydraulically powered and was for a flume 5m deep and 3m wide.
Custom-built and quick installation with on-going support and training
Each wavemaker is custom-built to the client’s requirements and is equipped with HR Wallingford’s Active Wave Absorption System.
Installation is quick and straightforward with HR Wallingford providing commissioning, training and on-going support.
Key features
- Generates long-crested random waves using HR Merlin signal generation software
- Dynamic Wave Absorption guarantees precise control of wave conditions
- Wet-backed piston paddle provides long stroke
- Stainless steel and GRP construction delivers a design life in excess of 20 years
- Digital AC servo motor provides precise control and rapid response
- Easy to maintain with all bearings and precision components above water
- Hinged flap wavemakers are available for deep water and hydraulically powered wavemakers are available for very large flumes.
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Marine, Naval, Hydrodinamic and OceanographWavemaker for 3D Basins
The multi-element wavemaker is used to create long and short crested waves for either deep or shallow water.
Piston type wavemakers
HR Wallingford’s piston-type multi-element wavemakers are made up from a number of self contained eight-paddle modules. This enables them to be easily installed, moved to different positions within the basin and to be extended as required.
These wavemakers are predominantly used in shallow water applications of up to 1m depth.
Hinge type wavemakers
HR Wallingford also supplies wavemakers for deep water basins and towing tanks. These hinge type paddles are again supplied in modular frames, each with four paddles that are fixed to the inside of the basin. The design of the hinge wavemaker support frame is such that it can be incorporated into basins and towing tanks with a two point fixing system that allows the modules to be removed for periodic maintenance.
Paddle drive system
Paddle width varies from 0.5-0.75m depending upon the client’s requirements. All paddles are of a wet-back design which means that there are no complicated seals between paddles or the basin walls and the floor. The paddles are mounted on linear slide assemblies that are supported from a common framework for the piston paddles. This leaves all motors, bearings and precision components well above the water level.
Custom-built and straightforward installation with on-going support and training
Each wavemaker is custom-built to meet the client’s requirements and is equipped with HR Wallingford’s Active Wave Absorption System. Installation is straightforward with HR Wallingford providing commissioning, training and on-going support.
Key features
- Generates short and long-crested random waves at normal and oblique angles using HR Merlin signal generation software
- Dynamic Wave Absorption guarantees precise control of wave conditions
- Wet-backed piston paddles ensure that performance is not limited by stroke for shallow water applications
- Stainless steel and GRP construction delivers a design life in excess of 20 years
- Digital AC servo motors provide precise control and rapid response
- Wavemakers supplied in either 4 or 8 paddle modules for ease of installation
- Easy to maintain with all bearings and precision components above water
- Hinge flap wavemakers are available for deep water basins, designed for easy removal of modules for maintenance tasks
- HR Wavemakers use HR Merlin wave generation software
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