Fluid handling – Flow affected by fluid contact – energy field or coanda effect
Patent
1988-10-18
1990-02-20
Cohan, Alan
Fluid handling
Flow affected by fluid contact, energy field or coanda effect
55DIG29, 98 36, F24F 900
Patent
active
049017640
ABSTRACT:
An apparatus for isolating an enclosure from external pollution includes a tube (2) with one end opening out into the enclosure and with its opposite end (5) being open. At least one slot (6) is provided in the inside wall of said tube in the vicinity of its opening (5), the slot being disposed in a plane perpendicular to the axis of said tube and sloping towards the opening. The slot is fed with gas so as to blow a continuous sheet of gas into the tube. At least one porous plate is disposed on the inside wall of said tube between the slot (6) and the opening (5), and the plate is fed with a gas which forms a small flow of gas suitable for overcoming the pressure reduction formed by the sheet of gas leaving from said slot (6). The enclosure is maintained at a pressure which is slightly higher than its surroundings so as to create a flow of gas running along said tube (2) and deflecting the sheet or sheets of gas leaving the slot (6) towards the opening (5).
REFERENCES:
patent: 3068775 (1962-12-01), Zehnder
patent: 4534277 (1985-08-01), Gillmor
Cohan Alan
Societe Generale Pour les Techniques Nouvelles -SGN-
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