Numerical investigation of the three-dimensional vortical flow for an ellipsoid model

A. P. Haas, A. Gross, H. F. Fasel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Non-Body-Of-Revolution (Non-BOR) submarine hulls allow more payload exibility and may yield improved maneuverability. Initial testing with free-running models and wind-tunnel experiments have, however, revealed a noticeably different maneuvering behavior of Non-BOR versus axisymmetric hulls due to the considerably altered hydrodynamics. Therefore, thorough understanding of the relevant flow physics for Non-BOR hulls is critically needed. The combination of three-dimensionality and unsteadiness results in a highly complex time-dependent topology of the separated region, which is not well understood. 3-D direct simulations for the Virginia Tech Non-BOR generic ellipsoid submarine hull were carried out for a case where roll instability was identified in the Virginia Tech experiments. Simulations for a Reynolds number (based on model length) of 20,000, an angle of attack of 30 degrees and a side-slip angle of 22 degrees reveal a highly asymmetric, unsteady lee vortex configuration.

Original languageEnglish (US)
Title of host publication32nd AIAA Applied Aerodynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624102882
DOIs
StatePublished - Jan 1 2014
Event32nd AIAA Applied Aerodynamics Conference 2014 - Atlanta, GA, United States
Duration: Jun 16 2014Jun 20 2014

Publication series

Name32nd AIAA Applied Aerodynamics Conference

Other

Other32nd AIAA Applied Aerodynamics Conference 2014
CountryUnited States
CityAtlanta, GA
Period6/16/146/20/14

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering

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    Haas, A. P., Gross, A., & Fasel, H. F. (2014). Numerical investigation of the three-dimensional vortical flow for an ellipsoid model. In 32nd AIAA Applied Aerodynamics Conference (32nd AIAA Applied Aerodynamics Conference). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2014-2703