In this paper the model cavitation experiments have been discussed as they were developed at the Depressurised Towing Tank of MARIN over the last decades. The recent modernisation of the Depressurised Towing Tank, in combination with a growing need to improve the reliability of the predictions of harmful cavitation have stimulated the development of new cavitation viewing test procedures. The additional measures taken to control the scale effects have been discussed.
The variation of the correlation factor between model and full scale hull pressure amplitudes and its average departure from unity have caused an urgent need to improve the prediction of the propeller induced vibration excitation. This need to improve the accuracy of the predictions of the excitation have led to the development of a hybrid scaling method for the extrapolation of the results of measurements of the hull-pressure fluctuations. By this extrapolation method the scale effect on the wake distribution is translated into a scale effect on the hull-pressure amplitude, ultimately using a Rans method and an instationary propeller code.
Cavitation and Vibration Research in the New Depressurised Towing Tank
Jahrbuch der Schiffbautechnischen Gesellschaft ; Chapter : 3 ; 97 ; 15-24
2005-01-01
10 pages
Article/Chapter (Book)
Electronic Resource
English
Marin: Upgraded Depressurised Towing Tank back in service
Online Contents | 2001
Cavitation testing of marine propellers in the NSMB depressurised fowing tank
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