Accession Number : AD0276455

Title :   DIFFUSION IN EXPANDING ELECTRICALLY NEUTRAL GASES WITH LARGE PRESSURE GRADIENTS. PART II. SHOCK TUBE FLOW USING GAS MIXTURES IN THE COMPRESSION CHAMBER

Corporate Author : FRANKFORD ARSENAL PHILADELPHIA PA PITMAN-DUNN RESEARCH LABS

Personal Author(s) : KATSANIS,D.J.

Report Date : MAR 1962

Pagination or Media Count : 1

Abstract : The mathematical model developed in Part I (AD- 274 781) is evaluated for theoretical shock tube flow. A brief review of the theory for ideal shock tube flow is presented regarding notation and terminology. Then, a diffusion equation is used to determine the transient composition within the expanding compression chamber gas. Numerical calculations are made for argon-helium mixtures and nitrogen-helium mixtures. The result is that composition changes of the order 1% of the initial composition are predicted. Relationships between the magnitude of the composition changes, diaphragm pressure ratio, and initial composition are presented graphically for use in experimental studies. (Author)

Descriptors :   *DIFFUSION, *SHOCK TUBES, *THERMODYNAMICS, ARGON, FLUID MECHANICS, HELIUM, IRREVERSIBLE PROCESSES, MIXTURES, NITROGEN, TURBULENCE

Distribution Statement : APPROVED FOR PUBLIC RELEASE