Accession Number : AD0717702

Title :   Holographic Applications in Shadowgraph, Schlieren, and Interferometry Analyses of Heat Transfer and Fluid Flow Test Subjects,

Corporate Author : AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Havener,A. G.

Report Date : NOV 1970

Pagination or Media Count : 42

Abstract : A folded conventional schlieren system was modified for transmission holography. Holograms of different test subjects, two heat transfer and two low supersonic flow studies, were made with direct undiffused laser light. Each event was reconstructed as a real image of the test and was analyzed using ordinary shadowgraph, schlieren, and interferometric techniques. Shadowgraph and schlieren photographs were obtained in two ways: first, a single hologram was double exposed and the interference was reconstructed directly from the hologram; second, two holograms were separately exposed and simultaneously realigned, and the interference was created between the holograms. Local values of density determined from the holographic interferograms agreed with previously known or theoretically calculated values. The shadowgraph and schlieren photographs agreed well with similar pictures of the same test subjects made with incoherent white light. (Author)

Descriptors :   (*FLOW VISUALIZATION, *LASERS), (*STEREOPHOTOGRAPHY, FLOW VISUALIZATION), (*HEAT TRANSFER, OPTICAL ANALYSIS), SCHLIEREN PHOTOGRAPHY, INTERFEROMETERS, DENSITY, SUPERSONIC FLOW, NOZZLE GAS FLOW

Subject Categories : Aerodynamics
      Holography
      Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE