THE USE OF THE FABRY-PEROT INTERFEROMETER WITH WEDGELIKE ARRANGEMENT OF MIRRORS FOR THE STUDY OF LOW-DENSITY AIR FLOWS,

Akimov, A. I.; Skokov, I. V.

THE USE OF THE FABRY-PEROT INTERFEROMETER WITH WEDGELIKE ARRANGEMENT OF MIRRORS FOR THE STUDY OF LOW-DENSITY AIR FLOWS,

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Abstract:

An efficient new application of the Fabry-Perot interferometer to study the properties of low-density gas flows is described. The complete optical system is briefly described, together with experimental and measuring techniques. The visual picture of a circular cylinder of 10 mm radius in a supersonic rarefied gas flow at M 4 and static pressure p 0.05 torr is shown. It is presented to illustrate the possibility of adjusting the interference fringes orientation to obtain different fringe shifts with the same flow parameters. Thus an optimal tuning of the instrument is necessary for the study of flows under different conditions. The results obtained here attest a sufficiently good agreement with theoretical data and show the advantages of the two-mirror multiple-beam interference system described here. The density distribution behind a shock layer in a section 0.35 mm distant from the stagnation point of the cylinder is given in a graph. Author

Author(s):

Akimov, A. I. ; Skokov, I. V.

Author Organization(s):

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Supplementary Note:

Edited machine trans. of Inzhenerno-Fizicheskii Zhurnal (USSR) v13 n6 p941-944 1967.

Annotation:

The use of the Fabry-Perot interferometer with wedgelike arrangement of mirrors for the study of low-density air flows--Translation.

Pagination:

0012

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:

Approved For Public Release

RECORD

Collection: TR

Identifying Numbers

Report Number(s):

FTD-MT-24-208-68

Subject Terms

Communities of Interest:

No COI(s) Identified

Descriptor(s):

(*FLOW VISUALIZATION, *INTERFEROMETERS), (*RAREFIED GAS DYNAMICS, FLOW VISUALIZATION), FLOW FIELDS, DENSITY, CYLINDRICAL BODIES, MIRRORS, STAGNATION POINT, USSR

Field(s)/Group(s):

Fluid Mechanics, Optics

Keyword(s):

RAREFIED GAS DYNAMICS, TRANSLATIONS

Report Date:

1968 Aug 20