SPHERE DRAG IN THE FREE-MOLECULAR AND TRANSITIONAL FLOW REGIMES

Abstract

Results are presented of sphere drag measurements made in the free- molecular and transitional flow regimes. The drag data were obtained using a drag balance and the free-flight technique. Conditions for which measurements were made are given. An analysis of the drag on a sphere in rarefied flow is also presented, and the results are compared with experimental data and other theories. The analytical results well predict the trend of the experimental data in the transition regime and remain valid at Knudsen numbers for which previous theories are not applicable.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1970
Accession Number
AD0704122

Entities

People

  • David L. Whitfield
  • William B. Stephenson

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Air Force
  • Boundary Layer
  • Dynamic Pressure
  • Experimental Data
  • Flow
  • Fluid Dynamics
  • Free Flight
  • Free Stream
  • Gas Flow
  • Knudsen Number
  • Mach Number
  • Measurement
  • Pressure Measurement
  • Surface Properties
  • Test Facilities
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.