VISUALIZATION OF LOW-DENSITY FLOWS BY MEANS OF OXYGEN ABSORPTION OF ULTRAVIOLET RADIATION
Technical Report
·
OSTI ID:4331866
S>A vacuum spectrograph-monochromator-camera with a 1470 A radiation source was adapted for installation in the low pressure wind tunnel. Shock wave photographs were taken of several flow configurations. The shock waves were those formed by flow over a sphere, a cone, wedges, and a cylinder with axis aligned parallel to the direction of the flow. All photographs were taken at a free stream Mach number of approximately 3.9, with a unlform jet area approximately two in. in diameter at the nozzle exit plane, and a tunnel test chamber static pressure of approximately 114 mu Hg. The photographs obtained were studied by means of a microphotometer. An analytical method of determining stream density, from the absorption of radiation in an axially-symmetric flow, is discussed. A sample density calculation is presented. (auth)
- Research Organization:
- California. Univ., Berkeley. Inst. of Engineering Research
- NSA Number:
- NSA-12-000361
- OSTI ID:
- 4331866
- Report Number(s):
- HE-150-130
- Country of Publication:
- United States
- Language:
- English
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