Sea-Surface Signatures of Propagating Submerged Objects

Abstract

The recent development of various masking and noise-reducing technologies for submarines, aimed at the reduction of their acoustic signatures, makes it critical to advance and implement alternative detection methods. To meet this objective, this study explores the prospects of identification of turbulent wakes that are necessarily generated by propagating objects in the ocean. This project is based on a series of high-resolution numerical simulations that were performed using the CFD (computational fluid dynamics) software OpenFOAM. In particular, the analysis is focused on the sea-surface signatures of submarine wakes and the role played by the sub-surface mixed layer in the vertical transmission of hydrodynamic wake signals. In the course of this investigation, we systematically explore the sensitivity of wake dynamics and its detection potential to the mixed layer depth, the location of the submersible, and its speed. Our findings are expected to ultimately offer valuable operational guidance for Undersea Warfare.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2022
Accession Number
AD1200602

Entities

People

  • Yeonwon Kim

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acoustic Detection
  • Boundary Layer
  • Buoyancy
  • Climate Change
  • Computational Fluid Dynamics
  • Detection
  • Detectors
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Froude Number
  • Mechanical Phenomena
  • Mechanical Properties
  • Naval Operations
  • Physics Laboratories
  • Reynolds Number
  • Stratified Fluids
  • Three Dimensional
  • Turbulent Mixing

Readers

  • Acoustical Oceanography.
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers
  • Systems Analysis and Design