Accession Number : AD0714610

Title :   The Application of Holographic Interferometry to the Determination of Asymmetric Three-Dimensional Density Fields in Free Jet Flow.

Descriptive Note : Doctoral thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Matulka,Robert Dale

Report Date : JUN 1970

Pagination or Media Count : 156

Abstract : The successful application of holographic interferometry, and an associated mathematical reduction process, to the determination of an asymmetric three-dimensional density field of an aerodynamic phenomenon is reported. An integral inversion method from the field of plasma physics was computerized, extensively evaluated and applied to the determination of functions, both axisymmetric and asymmetric, which simulate aerodynamic density fields. The application of holographic interferometry was extended to provide multiple holograms about a test region, with sufficient coverage to provide interferometric data for the successful solution of the density field. The analytical and experimental methods developed were applied to an experimental axisymmetric test field, the supersonic flow from a free jet, and shown to be comparable to a previous solution obtained by the Abel inversion method. Further, the free jet was tilted to provide a test field which was asymmetric in the plane of solution. Comparison of the resulting asymmetric solution was shown to be self-consistent with the previously obtained axisymmetric solution. (Author)

Descriptors :   (*THREE DIMENSIONAL FLOW, *JETS), (*FLOW VISUALIZATION, *INTERFEROMETERS), LASERS, STEREOPHOTOGRAPHY, AERODYNAMICS, DENSITY, SUPERSONIC FLOW, THESES

Subject Categories : Aerodynamics
      Holography
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE