Effect of Core Size on the Rise and Demise of Trailing Vortices

Abstract

Experiments were conducted with five lifting surfaces to investigate the evolution of trailing vortices in stratified and unstratified water. The vortex trajectories were determined as a function of the relative depth D/bo, normalized time Vot/bo, stratification parameter Nbo/Vo, and the relative vortex core size ro/bo. The results have shown that the vortices rise only to a finite height as they gradually demise under the influence of turbulence, sinusoidal instability, and the vortex breakdown. The effect of stratification is to reduce the lifespan of vortices and the maximum height attained by them. Various approximate analyses have been examined and new ones have been proposed to determine the lifespan of the trailing vortices.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1982
Accession Number
ADA122556

Entities

People

  • Turgut Sarpkaya

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Aspect Ratio
  • Computational Fluid Dynamics
  • Delta Wings
  • Drainage Basins
  • Engineering
  • Equations
  • Experimental Data
  • Flow
  • Flow Visualization
  • Fluid Flow
  • Lifting Surfaces
  • Mechanical Engineering
  • Physics Laboratories
  • Stratified Fluids
  • Three Dimensional
  • Turbulence

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Mechanics and Fluid Dynamics.