Research on a Ship Deflection Anti-Collision Method Based on a Water-Jet Interference Flow Field
Source abstract
Abstract
Currently, water jets are mainly used in the fields of mechanical processing and mining collection. This paper creatively introduces them to the field of safety assurance for inland navigation. Compared with the traditional bridge anti-striking methods such as intelligent early warning and passive anti-striking, this method can form an “interference zone” by changing the water flow conditions in the local bridge water areas, causing the yawing moment of the yaw ship to change, thereby causing the ship’s course to change, and thus guiding the ship to move away from the bridge pier to realize active anti-striking of the ship. In this paper, a combination of generalized model testing and numerical simulation was used to study the effects of different nozzle pressures and different ship pier distances of the water-jet generator on the trajectory and drift angle of the stalled ship. The results showed that the numerical simulation was in good agreement with the model test results. Within the interference zone, the distance between the ship and the pier increased rapidly after the action of the disturbance zone to 9.1, 5.8, and 6.2 times the ship’s width, respectively, reaching a safe distance. During the process of being affected by the interference zone, the maximum drift angle of the yaw ship was less than 20°, the course of the ship was generally stable, and the drift angle comparison error was a maximum of 10.6%, a minimum of 3.5%, and an average error of 6.7%. A negative peak and a positive peak of four times the absolute value of the negative peak occurred in the yaw-moment ephemeral curve during the ship’s passage through the interference area. The method had a notable effect on the anti-striking of stalled ships and two invention patents applied for in the course of research.
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Research context
OpenAlex topics: Ship Hydrodynamics and Maneuverability · Structural Integrity and Reliability Analysis · Fluid Dynamics Simulations and Interactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Chongqing Bridge Navigation Safety and Striking Prevention Engineering Technology Research Center, Chongqing Jiaotong University, Chongqing 400074, China
National Engineering Technology Research Center for Inland Waterway Improvement, Chongqing Jiaotong University, Chongqing 400074, China
Funding
Chongqing Talent Program Innovation and Entrepreneurship Demonstration Team · National Natural Science Foundation of China · Chongqing Postgraduate Mentoring Team Construction Project
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