Additional information
| Brand | HR Wallingford |
|---|
Wavemaker 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.
100% Original and qualityRelated products
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Marine, Naval, Hydrodinamic and OceanographWave Gauge System – 8 Channels
The wave gauge system is a simple and reliable device for measuring rapidly changing water levels in physical models. When combined with our HR DAQ data acquisition and analysis software it provides a first rate method of measuring wave height in a flume or 3D basin.
Our wave gauge system is suitable for use in:
2D flume
For this configuration, the wave probes are supplied with a mounting block allowing the calibration stem, that is fixed to the wave probe head, to be attached to any vertical surface.3D wave basin
For basins, we have a selection of tripods for using 600 to 1200 mm wave probes. For shallow water up to 1 m depth, a smaller stand to fit 300 mm wave probes is available.Product features:
- Extremely linear output
- No hysterisis
- Reliable, proven design
- Easily calibrated
- Longer distances from the data acquisition PC can be achieved by linking two wave probe cases together
- Multiple wave probe cases can be used in the digital network to meet the desired number of wave probe channels
- Data can be logged directly into a computer via the network link and analysed using HR DAQ software.
Our wave gauge system includes:
Wave probesEach wave probe comprises two parallel stainless steel rods, each with a plastic head and foot. The wave probes operate by measuring the current that flows between the two rods immersed in water. This current is converted to an output voltage that is directly proportional to the immersed depth. The standard probe lengths are 300, 600 and 900 mm.
Wave probe case
A wave probe case is supplied to accommodate up to eight monitors. This case contains all the necessary signal conditioning, together with an inbuilt analogue-to-digital output that allows the data to be saved directly to a data acquisition PC.
The case is supplied with its own standard plug and power supply for the modules.
If you need to use more than eight probes at the same time, then multiple cases can be linked together so requiring only one computer for configuration.
HR DAQ software
Our wave gauge system can be connected to a computer to collect data. This data can also be analysed using HR DAQ for analysis +/- 10V dc analogue output available for use with other data acquisition systems.
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