Non-uniform temperature profile generator for use in short durat

Details Non-uniform temperature profile generator for use in short durat Non-uniform temperature profile generator for use in short durat

1993-03-11

1994-10-04

Walberg, Teresa J.

Electric resistance heating devices

Heating devices

Continuous flow type fluid heater

219483, 219553, 392486, H05B 310

Patent

active

053533704

ABSTRACT:
Apparatus for producing a non-uniform temperature profile in a short duration wind tunnel includes a plurality of nested cylindrical elements each having an inlet end and an outlet end, a plurality of heater element extending axially along the surface of each of the cylindrical elements. The length and thermal mass of the cylindrical elements permits the temperature of test gasses to be raised to the desired level while the gasses are passing over those elements. A plurality of honeycomb elements occupy the space between each of the cylindrical elements to distribute the heating effects smoothly both radially and circumferentially. Each heater is controlled individually by a control circuit in order to establish the desired temperature profile at the outlet end of the apparatus.

REFERENCES:
patent: 1294695 (1919-02-01), Osterheld
patent: 1304365 (1919-05-01), Powell
patent: 3163841 (1964-12-01), Willett
patent: 3474229 (1969-10-01), Rump
patent: 3593002 (1971-07-01), Herbert
patent: 3770389 (1973-10-01), Kitzner
patent: 3904851 (1975-09-01), Gustafson
patent: 3995143 (1976-11-01), Hervert
patent: 4232214 (1980-11-01), Shioi
patent: 4237697 (1980-12-01), Cherbland
patent: 4281238 (1981-07-01), Noma

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