The impacts of the free-surface and angle of attack on the flow structures around a torpedo-like geometry

Kilavuz, A.; Sarigiguzel, F.; Özgören, Muammer; Durhasan, Tahir; Şahi̇n, Beşi̇r; Kavurmacıoğlu, Levent; Akıllı, Hüseyin; Sekeroglu, E.; Yanıktepe, Bülent

doi:10.1016/j.euromechflu.2021.12.005

Cited by 17 publications

(2 citation statements)

References 29 publications

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“…Lower angles of attack studies (de Barros et al, 2008;Yagmur, 2016), on the other hand, are often used in combined yawing angles of attacks studies as well as in self-adjusting route of autonomous underwater vehicles (AUVs). Experimental investigations of a torpedo-like geometries for different angles of attack and submersion ratios were performed by Kilavuz et al (2022aKilavuz et al ( , 2022bKilavuz et al ( and 2022c and Sariguzel et al (2022). They emphasized that free-surface has a dominant effect when the submersion ratio is less than a diameter of the geometry and the elliptical noses provide a better performance near the surface.…”

Section: Introductionmentioning

confidence: 99%

POD Analysis of Flow around Torpedo-Like Geometry with a Hemispherical Nose

KENAN,

YANIKTEPE,

OZGOREN

et al. 2023

Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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There has been an increased interest in underwater vehicles for a wide range of applications over the past decade. In the current study, flow characteristics around a common, torpedo-like geometry with a Myring profile were investigated at a length-based Reynolds number of Re=20000 using the Particle Image Velocimetry (PIV). As a result of PIV and Proper Orthogonal Decomposition (POD) analyzes in this study; instantaneous streamline topology Ψ, instantaneous vorticity ωL⁄U_∞ contours, instantaneous streamwise velocity component u⁄U_∞ graphs, cross-streamwise velocity component v⁄U_∞ graphs, instantaneous vorticity ωL⁄U_∞ graphs, perpendicular to the flow direction, instantaneous vortex graphs and time-averaged TKE graphs were evaluated and compared. At the same time, as a result of PIV analysis, time-average streamline topology <Ψ> and Time-averaged vorticity <ωL⁄U_∞ > contours values are given. When the flow characteristics were compared by using the obtained POD method of the PIV results, it was determined that although the POD data were generally quite similar to the PIV results, the POD analysis results had a more uniform flow structure and vortex turbulence was lessened.

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Section: Introductionmentioning

confidence: 99%

POD Analysis of Flow around Torpedo-Like Geometry with a Hemispherical Nose

KENAN,

YANIKTEPE,

OZGOREN

et al. 2023

Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…Technological developments in all fields have been affected the production of manned or unmanned autonomous underwater vehicles (AUVs). Therefore, many researchers have been directed to design, apply and improve the new generations AUVs in defense, industry and research areas (Ozgoren et al 2010;Rattanasiri et al 2012;Tian et al 2017;Akbudak et al 2021;Kilavuz et al 2022). One of the AUVs is a torpedo-like geometry that has to reach the predetermined target with stored energy on the body in time.…”

Section: Introductionmentioning

confidence: 99%