Continuous laminar smoke generator

Details Continuous laminar smoke generator Continuous laminar smoke generator

1983-08-30

1985-01-15

Woodiel, Donald O.

Measuring and testing

Wind tunnel: aerodynamic wing and propeller study

G01M 900

Patent

active

044932111

ABSTRACT:
The invention relates to a smoke generator capable of emitting a very thin, laminar stream of smoke for use in high detail flow visualization. The generator is also capable of emitting a larger but less stable "rope" of smoke. The invention consists of a pressure supply 29, and fluid supply 28, which supply smoke generating fluid 25 to feed tube 22. Feed tube 22 is directly heated by electrical resistance from current supplied by power supply 30 and regulated by constant temperature controller 32. Smoke exit hole 21 is drilled in the wall of feed tube 22. Because feed tube 22 is heated both before and past exit hole 21, no condensation of smoke generating fluid occurs at the smoke exit hole, enabling the production of a very stable smoke filament 16. The generator is small in size, thereby avoiding wind turbulence in front of the test model 11.

REFERENCES:
patent: 1676984 (1928-07-01), Fales et al.
patent: 2311199 (1943-02-01), Astradsson
patent: 2324359 (1943-07-01), Callan
patent: 2437963 (1948-03-01), Langmuir et al.
patent: 2836567 (1958-05-01), Reure et al.
patent: 3017367 (1962-01-01), Persechino
patent: 3869909 (1975-03-01), Hale et al.
patent: 3964304 (1976-06-01), Parrish
"Space Spinoff: Improved Smoke Generator for Wind Tunnels", Heating/Piping/Air Conditioning, Dec., 1971, p. 30.

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