Abstract
When the ice-class propeller sails in an icy sea, it is affected by external factors such as water, ice, and cavitation, and the process of mutual interference is extremely complicated. In order to study the influence of water and cavitation on propeller load during the ice-propeller milling process, a test platform for ice–water propeller milling action was constructed. The load and cavitation of the propeller and single blade were measured during ice-propeller milling in air and water (atmospheric pressure and decompression conditions). Simultaneously, the changes in the load and bearing force of the propeller and blade were studied at different working conditions. The results show that, in the process of ice–water propeller milling, the direction of the propeller thrust generated by the water is opposite to that of the axial force generated by ice; the combined action of the two causes propeller thrust loss, whereas the combined action of water and ice increases propeller torque. The presence of water increases the thrust, torque, and bearing force of the fluctuating amplitude of the blade. The occurrence of cavitation reduces the thrust and torque of the propeller and blade and increases thrust fluctuating amplitudes while decreasing the tangential force fluctuating amplitude of the blade.
Highlights
The results showed that propeller thrust decreased whereas torque increased during the ice-propeller milling process, which is the result of cavitation and ice-blade milling
It is evident from the figures that under the same propeller rotational speed and inflow velocity, the mean and peak values of the propeller thrust and torque are the largest when ice–water propeller milling occurs at atmospheric pressure, followed by that under the decompression condition, whereas the ice milling load of the propeller in air is the smallest
A test platform for ice–water propeller milling was constructed in a large circulation water channel, and an ice-propeller milling test in air and ice–water propeller milling test under atmospheric pressure and decompression conditions were conducted
Summary
With the opening of the Arctic channel, especially the Arctic Northeast channel, and the development of Arctic resources, there has been increased global focus on icebreakers, ice-class ships, and other ice-going ships used to open the channel for polar navigation ships. Wang et al [8] carried out a milling experiment on an ice–water propeller in an ice tank and determined the variation law of the mixed load (time-domain curve, mean value, and extreme value) of the propeller and blade based on geometric parameters, advance coefficient, angle of attack, milling depth, and other important factors. Huang et al [12] performed an ice–water propeller milling test in an ice tank under the typical navigation mode and discussed the change in the propeller mixed load when the propeller was milling with a columnar layer and granular layer of ice. Wu et al [13] carried out a collision test between smaller chunks of ice and propeller by using multiple high-speed video acquisition devices and propeller hydrodynamic performance measuring devices. The test results revealed a variation law of different load components in an ice–water propeller milling process
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
