Accession Number : AD0001910


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


Corporate Author : CALIFORNIA UNIV BERKELEY INST OF ENGINEERING RESEARCH


Personal Author(s) : BELL, S ; SCHAAF, S A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/001910.pdf


Report Date : 19 Dec 1952


Pagination or Media Count : 22


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.


Descriptors :   *HEAT TRANSFER , STRESSES , TEMPERATURE , CONDUCTIVITY , MOLECULES , LOADS(FORCES) , GASES , LOW VELOCITY , FLOW RATE , INTERNAL , THERMAL CONDUCTIVITY , AERODYNAMIC FORCES , AERODYNAMIC CHARACTERISTICS , FLOW , MAXWELLS EQUATIONS , DRAG , HEAT FLUX , GAS FLOW , NONUNIFORM


Subject Categories : Thermodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE