Accession Number : ADD012889

Title :   Non-Perturbing Beam Deflection System and Method for High Repetition Rate Temperature Measurement of Combustion.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Goss,Larry P ; Grosjean,Dennis F ; Sarka,Benjamin , Jr ; Kizirnis,Sigmund W ; Ganguly,Biswa N

Report Date : 07 Apr 1987

Pagination or Media Count : 9

Abstract : A novel laser beam deflection system and method for temperature measurement of combustion flames of known composition is described which comprises a thin wire for placement at a predetermined location within the blame; a pulsed laser source for directing a pulsed beam onto a wire for heating the wire and immediately surrounding gases of the flame to produce and acoustic pulse in the flame; a pair of probe laser sources for directing parallel probe beams through the flame in predetermined spaced relationship to each other and to the wire, and a pair of detectors and associated electronics for detecting the respective deflections of the probe beams resulting from interactions with the pulse and measuring the time difference between respective deflections of the probe beams to determine the seed of the acoustic pulse through the flame and the temperature of the flame from the speed determination.

Descriptors :   *PATENTS, *FLAMES, *LASER BEAMS, *COMBUSTION, ACOUSTIC WAVES, PULSES, ELECTRONICS, DEFLECTION, LASERS, PROBES, SOURCES, PULSED LASERS, MEASUREMENT, TEMPERATURE, GASES, DETECTORS, DETERMINATION, VELOCITY, THINNESS, WIRE

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE