Accession Number : AD0288922

Title :   DIRECT MEASUREMENTS OF RECOMBINATION RATES IN A SHOCK TUBE

Corporate Author : SPACE SYSTEMS DIV LOS ANGELES AIR FORCE STATION CALIF

Personal Author(s) : JACOBS,T.A. ; HARTUNIAN,R.A.

Report Date : 30 SEP 1962

Pagination or Media Count : 1

Abstract : By an extension of the ideas embodied in the single-pulse shock tube, a technique was developed which allows the direct measurement of recombination rates of many atomic species at high temperature. In the present technique, the expansion chamber is located a few tube diameters from the shock tube end plate rather than at the high-pressure end as in the conventional singlepulse shock tube. A cylindrical diaphragm, lying flush with the inside diameter of the tube, is used to control the time of initiation of an expansion wave. Experimental observation has shown that the present technique increases the gas expansion rate by an order of magnitude. The one-dimensionality of the flow at the shock tube end wall was also investigated. The technique developed in conjunction with the spectroscopic means of observation was employed to gain preliminary measurements of the recombination rate of atomic chlorine. (Author)

Descriptors :   *FLUID FLOW, *RECOMBINATION REACTIONS, *SHOCK TUBES, DIFFUSION, HIGH TEMPERATURE, MEASUREMENT, SPECTROGRAPHIC ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE