A Review of Sphere Drag Coefficients Applicable to Atmospheric Density Sensing

Abstract

A comprehensive search has been performed on the drag coefficient of spheres in the Reynolds number range from 50 to 50,000 and for Mach numbers up to 5. This Reynolds-Mach number range corresponds to the range of interest in the falling sphere technique of atmospheric sensing. In this technique, the knowledge of the sphere's trajectory and its aerodynamic characteristics are used to obtain the density of the atmosphere. The presently available data have been collected and analyzed as to their validity and applicability to atmospheric density measurements. A new drag table is recommended for use in these measurements.

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Document Details

Document Type
Technical Report
Publication Date
Jan 18, 1972
Accession Number
AD0742768

Entities

People

  • Maigonis V. Krumins

Organizations

  • Naval Ordnance Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Aerodynamic Characteristics
  • Altitude
  • Boundary Layer
  • Fluid Dynamics
  • Fluid Mechanics
  • Free Stream
  • Gas Flow
  • Heat Transfer
  • Knudsen Number
  • Mach Number
  • Ordnance Laboratories
  • Reynolds Number
  • Surface Roughness
  • Surface Temperature
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.