CYLINDER DRAG IN THE TRANSITION FROM CONTINUUM TO FREE MOLECULE FLOW

Abstract

The drag coefficients for cylinders normal to the flow have been determined experimentally at approximately Mach 2, 4, and 6 with Knudsen numbers extending from continuum conditions to free molecule flow conditions. The results indicate a smooth transition from inviscid values at low Knudsen numbers to free molecule flow predictions for diffuse reflections at high Knudsen number. Small departure theories which are applicable to the near free molecule flow regime are compared to the experimental data.

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Document Details

Document Type
Technical Report
Publication Date
Mar 20, 1962
Accession Number
AD0274385

Entities

People

  • G.j. Maslach
  • S.a. Schaaf

Organizations

  • University of California, Berkeley

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Forces
  • Boltzmann Equation
  • Boundary Layer
  • California
  • Computational Fluid Dynamics
  • Diffuse Reflection
  • Drag
  • Engineering
  • Equations
  • Fluid Dynamics
  • Free Stream
  • Heat Transfer
  • Mach Number
  • Measurement
  • Pressure Measurement
  • Two Dimensional
  • United States

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Combustion science or combustion engineering.
  • Quantum Chemistry