USE OF SCHLIEREN OPTICS WITH LOW GAS PRESSURES
Abstract
A series of experiments has been conducted using schlieren apparatus at low gas pressures. The experience here gained will be applied in the design of optical equipment for a projected Mach 5 wind tunnel. Lenses and mirrors of various focal lengths and aperture ratios were used for collimating the beam and for collecting the deviated light. Among other experiments, a trial was made with mirrors in which an axial secondary mirror was used similar to the diagonal in the Newtonian telescope. The test phenomena were shock waves produced in a partially evacuated gas chamber either by passage of a condenser discharge across a gap or by air flow from a special nozzle. The beam of the schlieren system crossed this chamber to display the refractive effects upon the screen of a camera.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 10, 1959
- Accession Number
- AD0654365
Entities
People
- E. A. Bunt
- E. L. Gayhart
Organizations
- Johns Hopkins University