VELOCITY DECAY IN THE INTERMEDIATE WAKE REGION BEHIND HYPERSONIC SPHERES

Abstract

Axial velocity decay data for hypersonic sphere wakes obtained with the sequential spark and probe array techniques were fitted with an equation of the form V sub w/V sub infinity symbol = C sub 1 (X/D) raised to the power C sub 2. This power law is found to fit the data very well for axial distances between 300 and 1000 body diameters behind the body. Values of C sub 1 and C sub 2 obtained from sequential spark measurements are given as a function of radial distance from the wake axis. Near the axis, the absolute value of C sub 2 is slightly greater than unity, decreasing to about one-third at radial distances of about two body diameters.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1968
Accession Number
AD0679181

Entities

People

  • C. Lahaye
  • D. Heckman

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Buildings And Structures
  • Computing Devices
  • Convection
  • Diameters
  • Electrostatic Probes
  • Equations
  • Flow
  • Hypersonic Velocity
  • Mach Number
  • Measurement
  • Motion
  • Projectiles
  • Shear Flow
  • Turbulent Flow

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Geodesy
  • Statistical inference.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flight