Free-Flight Measurements of Sphere Drag at Subsonic, Transonic, Supersonic, and Hypersonic Speeds for Continuum, Transition, and Near-Free- Molecular Flow Conditions

Abstract

A comprehensive set of measurements was made in a ballistic range which permits the sphere drag coefficient to be derived with an uncertainty of approximately +2 or -2 percent in the flight regime 0.1 < M < 6.0 and 20 < Re < 100,000 for Tw/T approx = 1.0. Sufficient information is also presented to predict the effect of wall temperature on sphere drag coefficient when Tw/T is not = 1.0 for 2 < M < 6. This investigation represents the most comprehensive experimental program to date to define sphere drag in the velocity-altitude regime applicable to the falling sphere technique for defining upper air density.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1971
Accession Number
AD0721208

Entities

People

  • A. B. Bailey
  • J. Hiatt

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Air Force
  • Altitude
  • Boundary Layer
  • Data Reduction
  • Free Flight
  • Free Stream
  • Gages
  • Instrumentation
  • Mach Number
  • Measurement
  • Mechanical Properties
  • Pressure Gages
  • Pressure Measurement
  • Test Facilities
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Theoretical Analysis.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flight
  • Hypersonics - Hypersonic Flow