Computational study on the effect of the shape of ducts on the performance of the submarine propeller

摘要

With the tremendous growth of science and technology in the world, the silent submarine has been an interestingresearch topic for many years. What is of equal interest is how to produce a high-speed submarine that limits noise tominimise detection from the enemy. In this study, we investigated the combination of a propeller and a duct so that whena submarine is operated, it minimises as much as possible the noise without affecting the speed of the submarine. Thegoal of installing the duct outside the propeller is to reduce the noise and loss of thrust simultaneously. The purpose ofthis article is to investigate the variation of the magnitude of the noise and thrust that occurs when a submarine propeller is operated in six different types of ducts. The research method is to use the large eddy simulation method with thecavitation model and then to calculate the result using the finite volume method. The study found that Ducts 1 and 4have a better noise reduction effect and better propulsion than the other four ducts. Among them, Duct 4 has the bestnoise reduction effect, and Duct 1 provides the maximum propulsion. In all of the computation examples herein, thecavitation phenomenon did not occur. In the future, we will continue to study the growth and decline of related physicalquantities with various types of propellers and ducts.