Hydrodynamic Numerical Analysis of the Naval ship with Twin-Propeller and Effect of the Stern Shape

Document Type : Original Article

Authors

1 Imam Khomeini Maritime academy

2 Imam Khomeini maritime academy

3 Babol Noshirvani University of Technology

Abstract

One of the most important factors in using military vessels is the ability to maneuvering. Determining the distance between the impellers and the body of the boats and the angle of the flow into the butterflies are very complex issues that ship designers particularly look at. In This article investigated the hydrodynamic modeling and analysis of a military vessel by taking two anti-rotating propeller using computational fluid dynamics. Fluent 5.14 software is used to simulate this process. The stern of the vessel is one of the components that it’s shape is effective on the resistance forces acting on the body of the vessel. The target vessel in this article was Frigate DTMB5415. First by altering the angle of the stern and displacement of the curvature of the stern, the best stern chosen from hydrodynamic point of view. Then two anti-rotating propeller was placed at the back of the chosen stern and analysis was performed for the shaft angles equal to zero and two degree respectively. Simulation of turbulent flow was performed by using k- ɛ RNG model with two equation. Two phase flow were considered for the analysis and modeling of two phase flow was carried out by volume of fluid method.

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References

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