Laser Holography to Visualize Low Speed Aerodynamic Flow Phenomena.
Abstract
The feasibility of using laser holography as a means of visualizing an aerodynamic flow field in three dimensions has been studied. The versatility of laser holography as a high speed recording system for a three-dimensional image, or a volume of information, is discussed. The three holographic techniques found to be most viable were neutrally buoyant bubble injection, helium interferometry, and smoke injection. Bubble injection uses double exposure holography to obtain both streamline directions and a velocity field. A complete flow field map is obtained statistically. Helium interferometry proved capable of showing up local, qualitative flow features. Smoke injection possesses the same advantage as the classical smoke techniques, but requires larger smoke densities.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1974
- Accession Number
- ADA015976
Entities
People
- A. B. Witte
- B. J. Matthews
- C. W. Lear
- D. E. Haflinger
- R. A. Briones
Organizations
- TRW Inc.