Engineering Success on Every Horizon

The Vienna Model Basin operates a towing tank with a total length of 200 meters, featuring a rectangular cross-section that is 10 meters wide and 5 meters deep. The basin is equipped with adjustable shallow water bottoms, allowing for modifications to any desired water depth. At one end of the tank, a hydraulic wavemaker is installed, capable of generating both regular and irregular waves with heights of up to 0.6 meters. The carriage can achieve a maximum towing speed of 7.5 meters per second.

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The depressurized cavitation tunnel is a Kempf & Remmers type K22, which can be configured with two different measurement sections depending on the required flow speed. The tunnel can achieve a maximum water speed of 12 meters per second, and the test section pressure can be adjusted from 0.1 to 1.0 bar. Wake fields can be simulated using a wire mesh and dummy bodies. The cavitation tunnel is equipped with J25 and H39 dynamometers, which can be used individually or in combination, allowing for tests with counter-rotating or tandem propellers.

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Vienna Model Basin's wind tunnel features a test section measuring 2,800 mm by 1,500 mm, capable of generating wind speeds ranging from 0.5 m/s to 28 m/s. It is an open-return type wind tunnel with an accessible and exposable measurement section. The measurement platform can rotate 360° and can accommodate models up to 2 meters in length. A six-component balance and a smoke generator are installed beneath the turntable. The boundary layer in the wind tunnel is carefully adjusted to replicate the actual boundary layer conditions at sea.

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Vienna Model Basin is capable of determining the resonance frequency of swimming pools by testing models on an oscillating platform known as the pool apparatus. Swimming pools can be subjected to roll, pitch, and oblique sinusoidal motions, with adjustable oscillation amplitudes. Additionally, wave heights can be measured at various positions within the pool model.

Outdoor Model Tests on maneuvering behavior that cannot be conducted in the Vienna Model Basin's towing tank due to space limitations or high speeds are performed outdoors. The model's behavior is tracked using a DGPS system, enhanced with corrections from a gyroscope and a magnetic compass to ensure the required accuracy. In addition to the ship's position and speed, ship motions and rudder movements are measured and recorded. All necessary maneuvers can be executed either manually or automatically.

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For half a century, we have been delivering numerical studies to our customers. Our main tasks include hull optimization, performance prediction, and wake field calculation, which are carried out using the commercial CFD solver Siemens StarCCM+. Additionally, we conduct maneuvering and seakeeping simulations with our in-house software. For specialized calculations that are not performed routinely, we collaborate with dedicated partners to meet our clients' needs.

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