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

Abstract

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

Numerical Study of Ld/D Ratio Effect to Thrust and Fluid Velocity on Ducted Propeller

“…Duct/nozzle merupakan selongsong yang melingkupi propeler dengan bentuk yang mengerucut di bagian outlet. Penggunaan duct pada propeler sudah teruji mampu mengurangi getaran, mengurangi noise dan meningkatkan efisiensi [2][3][4][5].…”

Numerical Simulation of the Effect of NACA 0012 Nozzle Geometry on Ducted Propeller Performance

“…Pengembangan-pengembangan tersebut dilakukan untuk meningkatkan performa propeler, seperti peningkatan gaya dorong (thrust), peningkatan efisiensi hingga pengurangan getaran dan noise [2]. Secara khusus, penambahan duct pada propeler sudah terbukti mampu meningkatkan efisiensi propeler serta mengurangi getaran dan noise pada propeler [3]. Modifikasi pada propeler ini bisa diterapkan di kapal penumpang, kapal pengangkut barang hingga kapal selam.…”