Similarity study of the turbulence characteristics of underwater vehicle models

• Autorzy: Bao Guozhi , Liu Bolong , Yang Ruitao , Si Xiaodong

Identyfikatory

DOI

10.2478/pomr-2025-0016

• Języki publikacji: EN

Abstrakty

EN

To achieve dynamic similarity with the experimental characteristics of structural flow, experimental models are often designed to stimulate turbulence that mimics high Reynolds number conditions. However, the size, shape, and placement of the trip wires play a crucial role in effectively exciting turbulence. This paper focuses on the SUBOFF scaling model as the subject of investigation. The RANS method was employed to analyse the flow field characteristics of a rotating body model with different excitation filaments, and the flow field properties of the model under trip wire perturbation were compared with those of a full-scale model at a 1:17.5 scaling ratio, to ensure similarity in terms of the Froude number. The goal was to identify the trip wire installation solution that most closely resembled the flow field characteristics of the full-scale model. The study found that the trip wire altered the boundary layer structure. Different installation positions of the trip wire led to varying effects on the boundary layer and local pressure gradient, which in turn affected the recovery of the boundary layer and modified the local flow field structure. By satisfying the condition for Froude number similarity, an experimental model subjected to surge filament perturbation can accurately simulate a pressure gradient, turbulence intensity, and vortex core structure that are comparable to those of a full-scale model. This finding offers a new approach for experiments focused on achieving high Reynolds number similarity.

Słowa kluczowe

EN

froude number; turbulence intensity; boundary layer; trip wire

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2025
• Tom: nr 2
• Strony: 4--16
• Opis fizyczny: Bibliogr. 34 poz., rys., tab.

Twórcy

autor

Bao Guozhi

• School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China

• https://orcid.org/0009-0009-3080-4177

autor

Liu Bolong

• School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China

• https://orcid.org/0009-0003-5819-4792

autor

Yang Ruitao

• School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China

autor

Si Xiaodong

• School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki i promocja sportu (2025).