Some improvements for brash ice test procedure

Abstract

This paper presents the procedure to produce the brash ice channel and the preliminary results of ship resistance and propulsion performance of the Terry-Fox in brash ice. Model tests of a 1:21.8 scaled model of CCG Icebreaker Terry-Fox in brash ice were carried out at the Institute for Ocean Technology's (NRC-IOT) ice tank. A total of four ice sheets were used: one for resistance tests, and three for towed propulsion tests. The results showed that it would be important to model the brash ice channel using multiple layers rather than a single layer due possibly to a significant influence of the number of layers on thrust reduction in the targeted ice condition (FSICR 1A). This difference in thrust reduction could be attributed to different degree of propeller-ice interaction associated with different brash ice configurations. Copyright？ (2009) by Lulea University of Technology.