Apparatus for the optical observation of phenomena in mixtures

Details Apparatus for the optical observation of phenomena in mixtures Apparatus for the optical observation of phenomena in mixtures

1983-06-23

1985-01-08

Kreitman, Stephen A.

Measuring and testing

Miscellaneous

73 53, 356440, G01N 2100

Patent

active

044921160

ABSTRACT:
Apparatus for the optical observation of the evolution of instabilities between two fluids having different densities subject to high initial pressures, of the type comprising an observation chamber with parallel faces containing the two fluids, initially separated by a diaphragm, and wherein it comprises in combination the arrangement of the observation chamber within a tight enclosure equipped with static pressurizing means and whereof one face is constituted by an optical observation window parallel to the two parallel faces of the observation chamber, the diaphragm having a straight cylindrical shape and is coupled to a mechanical extraction shaft, the geometrical axes of the diaphragm and the extraction shaft being perpendicular to the faces of the observation chamber, the extraction shaft sealingly sliding through the wall of the enclosure opposite to the said window, while part of the extraction shaft external of the pressure enclosure is integral respectively with a piston sliding within a cylinder and which can be actuated by a high pressure fluid in order to drive the extraction shaft towards the outside of the enclosure, a mechanical device for locking and unlocking the extraction shaft and device for stopping the extraction shaft at the end of its travel.

REFERENCES:
Journal of Applied Physics, vol. 52, No. 2, Feb. 1981, American Institute of Physics, New York (US), L. Baker et al., "Heuristic Mode of the Non-Linear Rayleigh-Taylor Instability", pp. 655-663, 665-666.
Review of Scientific Instruments, vol. 48, No. 4, Apr. 1977, American Institute of Physics, New York (US), W. Black et al., "Interferometric Method for the Determination of Binary Gas Mass Diffusivities", pp. 476-481.
Soviet Physics JETP, vol. 44, No. 2, Aug. 1976, American Institute of Physics, New York (US), V. Andronov et al., "Turbulent Mixing at Contact Surface Accelerated by Shock Waves", pp. 424-427.

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