Numerical Analysis of Propeller-induced Low-frequency Modulations in Underwater Electric Potential Signatures of Naval Vessels in the Context of Corrosion Protection Systems

Stuttgart, Germany: COMSOL Conference 2011 (2011), 25 Seiten
Buch / Monographie / Fach: Elektrotechnik
Fakultät für Ingenieurwissenschaften
Since October 2009 the laboratory of ATE has carried out collaborative research
with the WTD 71 that aims for prediction, reduction and optimization of so-called
underwater electric potential (UEP) signatures. COMSOL is used to simulate
potential distributions in the context of impressed current cathodic protection
(ICCP) systems. The electrode kinetics is considered by using boundary
conditions based on non-linear polarization curves. We demonstrate how the
polarization resistance flattens singular e-field peaks at sharp edges, hence
reducing the UEP signature modulation. The ICCP-current-modulation by means
of shadowing effects is considered, focusing on the so-called Vernier-/Nonius
effect. In addition an interesting estimation is presented, about what ICCPsettings
are recommendable in the context of a silent running (stealth operating