Accession Number:

AD0671585

Title:

EXPERIMENTAL DETERMINATION OF DRAG FACTOR FOR A SPHERE IN A SUPERSONIC RAREFIELD GAS FLOW (EKSPERIMENTALNOE OPREDELENIE KOEFFITSIENTA SOPROTIVLENIYA SHARA V SVERKHZVULKOVOM POTOKE RAZREZHENNOGO GAZA),

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1967-08-29

Pagination or Media Count:

9.0

Abstract:

A large number of experiments were conducted in a low density wind tunnel to determine the drag coefficient of a sphere in the Mach and Reynolds number range 3.6 M 6.0, 2 R 500. The sphere surfaces were highly polished the diameters varied between 1 and 14 mm. A special effort was made to determine the effect of model support sting on the total shere drag. This was done by two sets of experiments. First, the total moment on the sphere was measured including the support and secondly, the drag was measured with the support flush with, and separated from the model. The experimental data obtained in this manner showed that the effect of the sting on the drag C sub x was of order 3-5 for a sting-to-sphere diameter ratio of 0.1. The effect of surface roughness on C sub x was tested by scratching the sphere surface. Within the experimental accuracy no effect could be observed on the sphere drag coefficient due to such surface roughness. Author

Subject Categories:

  • Aerodynamics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE