A STUDY OF PASSIVE FLOW ON NATO-GD SHIP MODEL AIRWAKE USING COMPUTATIONAL FLUID DYNAMICS

Abd Elmenaim H. Alaktaa, Salaheldin A. Mohamad, Ahmed S. Shehata, Khaled Elsherbiny

Abstract


This study focuses on numerically analysing the passive flow control method for manipulating air wakes on the NATO-GD ship model using detached eddy simulation (DES). The numerical techniques are verified through comparison with experimental data obtained from the NATO-GD baseline. To develop the flow control model, the hanger base of the original NATO-GD ship model is altered by incorporating a curved roof edge. The findings indicate distinct performances in vortex structure on the flight deck between the two cases, along with variations in turbulent characteristics. Specifically, the results demonstrate that the curved roof edge directs flow more effectively towards the low- speed area (LSA) on the deck, leading to improved reduction of flow recirculation and enhanced recovery of streamwise velocity. How-ever, this modification also results in higher levels of turbulent kinetic energy (TKE) in the air wake. 

Keywords


Air wake, Frigate flow control, passive, NATO-GD model, Flight deck, CFD.

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DOI: https://dx.doi.org/10.21622/MARLOG.2025.14.1.43

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Copyright (c) 2025 Abd Elmenaim H. Alaktaa, Salaheldin A. Mohamad, Ahmed S. Shehata, Khaled Elsherbiny

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The International Maritime Transport and Logistics Journal (MARLOG)

E-ISSN: 2974-3141
P-ISSN: 2974-3133

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