Dynamic Stability Results for Sharp and Blunted 10-deg Cones at Hypersonic Speeds

Abstract

Tests were conducted to obtain dynamic stability data for sharp and blunted 10-deg half-angle cones. With both a free-oscillation gas bearing pivot balance system and a forced-oscillation cross-flexure pivot balance system, data were obtained at a nominal Mach number of 10 at free-stream Reynolds numbers, based on model length, ranging from 1,800,000 to 3,190,000. The effects of boundary-layer transition, amplitude of oscillation, nose bluntness, and model center-of-gravity location on the dynamic and static stability derivatives are presented. Comparison of data from the free- and forced-oscillation test techniques and the effect of frequency of oscillation on the damping-in-pitch derivatives are also presented. The derivatives are compared with steady and unsteady flow field theories.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1968
Accession Number
AD0845053

Entities

People

  • B. L. Uselton
  • L. K. Ward Jr.

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Air Force
  • Amplitude
  • Boundaries
  • Boundary Layer
  • Boundary Layer Transition
  • Center Of Gravity
  • Engineering
  • Flow
  • Flow Fields
  • Free Stream
  • Government (Foreign)
  • Gravity
  • Jet Propulsion
  • Mach Number
  • Reynolds Number
  • Unsteady Flow
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Control Systems Engineering.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Boundary Layers
  • Hypersonics - Hypersonic Flow