AERODYNAMIC FORCES ON A CYLINDER FOR THE FREE MOLECULE FLOW OF A NON- UNIFORM GAS
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. 13:643-664, 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 body's 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 19, 1952
- Accession Number
- AD0001910
Entities
People
- S. Bell
- S.a. Schaaf
Organizations
- University of California, Berkeley