Ship Hydrodynamics is a centre of the Maritime Technologies activity. The main area of this activity is testing of ship characteristics in laboratory conditions, which includes model testing, and development and optimisation of ship hull form and propulsors in towing tanks and cavitation tunnels.

Ship Hydrodynamics infrastructure includes four towing tanks, two cavitation tunnels and one special purpose tunnel, workshops for manufacturing models of ships and propulsors, and state-of-the-art laboratories.

Designing of various types of ships and propulsors, hydrodynamic testing, and off-shore engineering are expert fields of Ship Hydrodynamics specialists.

Testing, development and optimisation of ship hull form and propulsors in towing tanks and cavitation tunnels

Services:                                                                            

Resistance and propulsion

  • evaluation of ship hull forms and preliminary power predictions
  • optimisation of ship hull forms based on model investigations
  • resistance tests
  • self-propulsion and tow force tests
  • power and speed predictions
  • tests with Azipod propulsion units[1]
  • 3D flow field measurements
  • streamline paint tests and tests with threads
  • propeller open water tests
[1] ‘Azipod’ or ‘podded propulsion units’, ‘azimuth thrusters’?  ‘Azipod’ as a registered brand name is often used with reference to ‘podded propulsion units’.

Ship motion dynamics

  • consulting services at all stages of project development
  • seakeeping tests on regular and irregular waves
  • manoeuvring tests of free-sailing models on open waters
  • prediction of ship motion characteristics, identification of motion-related problem areas (accelerations, speed loss, slamming, motion sickness)
  • launchings
  • launching preliminary studies and optimisation
  • model launching experiments with measurements of speed, accelerations, path, forces and moments during launching
  • optimisation of launching methods to achieve necessary stability and safety of the ship during full scale launching

Propulsion, cavitation and fast ships

  • cavitation testing
  • pressure fluctuations due to cavitation phenomena
  • cavitation erosion model testing
  • evaluation of ship propeller designs and feasibility studies
  • resistance and propulsion tests
  • dynamic instabilities tests
  • seakeeping tests
  • optimisation investigations
  • full-scale measurements

Sea trials

  • propulsion testing – measured mile, main engine endurance test
  • manoeuvrability tests
  • seakeeping tests
  • noise, vibration, and strength measurements
  • ship lighting measurements

Hydraulic modelling and measurements

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  • construction and testing of physical models of hydraulic structures for assessment of safety, and environmental and economic impacts, and for definition of parameters
  • ports and on-shore structures (wave loads and building up of sediment)
  • moored structures and breakwaters
  • hydropower plants and other structures

Hydrometric measurements

  • calibration of hydrometric instruments, e.g. hydrometric wings
  • dimensions of the tank allow simultaneous testing of up to 24 instruments

Large Towing Tank

L = 276 m

B = 12.5 m

H = 6 m

max carriage speed 14 m/s

Resistance and propulsion

 

Sea keeping

 

Hydraulic and hydro technic models

References:

  • Brodosplit – Split, Croatia
  • BSO – Split, Croatia
  • Uljanik – Pula, Croatia
  • Greben – Vela Luka, Croatia
  • Tankerska plovidba Zadar, Croatia
  • Ministry of Defence of the Republic of Croatia
  • Ministry of the Sea, Transport and Infrastructure
  • Azimut Benetti, Sydac
  • Trieste, Fincantieri, TMT, Nuvolari –Lenard
  • Cantieri Navali Beconcini – Italia
  • Rolls – Royce, Sweden
  • Marinteknik, Singapore
  • Heavy Lift, Netherlands
  • Briand Yacht Design, France
  • Naviera Ulises, Greece
  • Marquis Yachts, Quantum – USA