Fiber Optics Particle-Sizing System
Final rept. Jul 1971-Jun 1972
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN
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A fiber optics particle-sizing system is discussed with respect to theory of operation and data acquisition and reduction techniques. The system uses a shadow-graphic technique to determine the dimensions and numbers of particles moving in a flow field. The system is digital in nature. Particles pass through a collimated laser beam and are imaged onto a linear array by a coaxial lens. The array is composed of the exposed ends of a fiber optics bundle which serves as a link between the array plane and the sensing photo-detector modules. Being an imaging device, it can measure a wide range of particle sizes through the proper selection of optics. Sizes ranging from 2 to 1500 micrometers have been measured in the course of this project. Comparisons of holographic data of a liquid rocket injector and of water spray nozzles are made with the fiber optics system.
- Fluid Mechanics
- Fiber Optics and Integrated Optics