DYNAMIC CHARACTERISTICS OF A 9-DEG CONE WITH AND WITHOUT ASYMMETRIES AT MACH NUMBER 10

Abstract

Wind tunnel tests were conducted at Mach number 10 on a 9-deg half- angle cone model using a unique dynamic stability balance having three angular degrees of freedom. Data obtained at Re = 1,970,000 on models having different types of compound asymmetries revealed vast differences in the developed motion. A model with a center-of-gravity offset and a small, out-of-plane nose slice as the second asymmetry was found to have a totally unexpected type of instability. The instability was the rapid divergence of the precession arm caused by a Magnus-type moment resulting from an out-of-plane force generated by the nose slice. When the slice was removed (sharp nose model) and the second asymmetry applied by using a small tab at the base, the classical roll resonance was found.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1970
Accession Number
AD0702448

Entities

People

  • A. C. Mansfield
  • L. K. Ward Jr.

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Air Force
  • Asymmetry
  • Center Of Gravity
  • Computer Programs
  • Data Analysis
  • Engineering
  • Flow
  • Flow Fields
  • Gravity
  • Instability
  • Mach Number
  • Precession
  • Resonance
  • Symmetry
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Fluid Dynamics.
  • Marine Hydrodynamics