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Volume 14, Issue 28 (1-2019)                   Marine Engineering 2019, 14(28): 21-29 | Back to browse issues page

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Farajollahi A, Dehghan Manshadi M, Hejranfar K. Numerical Investigation of Effect of Arrangement of Generators on Flow over a Suboff Submrine Model. Marine Engineering 2019; 14 (28) :21-29
URL: http://marine-eng.ir/article-1-683-en.html
Numerical Investigation of Effect of Arrangement of Generators on Flow over a Suboff Submrine Model
AmirHamzeh Farajollahi * 1, Mojtaba Dehghan Manshadi2 , Kazem Hejranfar3
1- Imam ALi
2- Malek Ashtar
3- Sharif
Abstract:   (4222 Views)
The vortex generated around a submarine has an important influence on the uniformity of the submarine wake at the propeller and hydrodynamic noise. A suitable way to reduce the effects of this separated flow is to use vortex generators. Vortex generators have different arrangement such as counter-rotating and co-rotating. The main goal of the present study is to investigate the flow field around a standard underwater model employing the vortex generator with different arrangement by using the CFD method (OpenFOAM code) in 0°≤α≤30° angles of attack. In this study, the application of CFD simulation which can help us to precisely study the structure of vortical flow field. The results show that counter-rotating vortex generators placed along the submarine do indeed significantly reduce strength of the vortex, line separation, size of cross-flow vortices and drag force. The amount of the drag reduction for the counter-rotating vortex generator is approximately 14% in α=30° and approximately 21% in β=30°.
Keywords: َArrangement of Vortex Generator, Counter-Rotating, Co-Rotating, OpenFOAM.
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Type of Study: Research Paper | Subject: Submarine Hydrodynamic & Design
Received: 2018/08/23 | Accepted: 2018/11/11
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