Accession Number:

AD0001910

Title:

AERODYNAMIC FORCES ON A CYLINDER FOR THE FREE MOLECULE FLOW OF A NON- UNIFORM GAS

Descriptive Note:

Corporate Author:

CALIFORNIA UNIV BERKELEY INST OF ENGINEERING RESEARCH

Personal Author(s):

Report Date:

1952-12-19

Pagination or Media Count:

22.0

Abstract:

An analysis is made of the free molecular flow of a nonuniform gas by an extension of the method for the Maxwellian case used by Tsien J. Aeronaut. Sci. 13643-664, 1946 and Stalder and Zurick NACA TN 2423, 1951. The results are sufficiently general to include arbitrary small stresses and heat flux. The body geometry is confined to that of a right circular cylinder oriented perpendicular to the gas-flow velocity the bodys thermal conductivity is assumed so large that it is at a uniform temperature. The aerodynamic force characteristics are determined. The lift and drag forces are shown to be affected by the nonuniformity. Force contributions from the stress and heat-flux terms are generally small compared to the force for the uniform case, except in regions of low flow velocity where the heat-flux terms become important. A method is indicated for obtaining the heat-transfer characteristics and data for other body geometries and bodies of low internal conductivity.

Subject Categories:

  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE