Accession Number:

ADP000285

Title:

Molecular Beam Technique for Recording Chemical Species Behind Incident Shock Waves,

Descriptive Note:

Corporate Author:

STUTTGART UNIV (GERMANY F R) INST FUER THERMODYNAMIK DER LUFT- UND RAUMFAHRT

Personal Author(s):

Report Date:

1981-07-01

Pagination or Media Count:

7.0

Abstract:

It is the purpose of the present paper to develop a molecular beam technique for recording continuously the concentration of chemical species behind the incident shock wave in a shock tube. The sample is drawn through a diverging nozzle located at the end of the low pressure section of the shock tube. The inlet diamters of the nozzles are 1-4 mm. It is assumed that the expansion is so fast that freezing of chemical reactions occurs. With a skimmer a molecular beam is formed which is analyzed with a quadruopole mass filter. Preliminary experiments were performed with N2 and binary mixtures of N2 and O2 at initial pressures between 1 mbar and 10 mbar and at Mach numbers ranging from Ms 6 to Ms 12. Experimental results are compared with intensities which are determined theoretically assuming a Maxwellian distribution function behind the incident shock.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE