Unsteady Separation over Maneuvering Bodies

Abstract

Development of a new boundary layer code has reached the status to permit meaningful applications. Computations have been carried out for the initiation of separation in the symmetry plane of a prolate spheroid of slenderness ratio 1/4, impulsively started into forward motion at zero incidence and also at 50 degrees angle. This case serves as validation by comparing with previously published results of Xu and Wang (ref.1), and also demonstrates that our method gives information of flow near the rear stagnation point not available in the literature. More studies have been performed on the optimization of surface suction to delay or prevent the unsteady separation for an impulsively started circular cylinder. Here the methodology should be of interest. Work on an unsteady three-dimensional thin-layer Navier-Stokes code, however, is progressing slowly. Keywords: Unsteady separation, three dimensional moving body, Separation control.

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Document Details

Document Type
Technical Report
Publication Date
Aug 15, 1990
Accession Number
ADA226829

Entities

People

  • J. Kim
  • S. F. Shen
  • Tony F. Wu
  • Zhigang Xiao

Organizations

  • Cornell University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Engineering
  • Fluid Dynamics
  • Geometric Forms
  • Geometry
  • Hydrodynamics
  • Laminar Boundary Layer
  • Navier Stokes Equations
  • Skin Friction
  • Stagnation Point
  • Steady State
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.