DEVELOPMENT OF CONCENTRATION MODULATED ABSORPTION AS A COMBUSTION DIAGNOSTIC

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$49,980.00
Award Year:
1989
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
10788
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Aerodyne Research Inc
45 Manning Rd, Billerica, MA, 01821
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr Kurt D Annen
Principal Investigator
(508) 663-9500
Business Contact:
() -
Research Institution:
n/a
Abstract
USING CONCENTRATION MODULATED SPECTROSCOPY, THIS STUDY WILL EXTEND WORK IN LASER TECHNIQUES FOR POINT MEASUREMENTS IN COMPLEX COMBUSTION SYSTEMS TO HIGH SENSITIVITY MEASUREMENT OF CONCENTRATIONS OF A WIDE VARIETY OF MOLECULAR SPECIES. THIS TECHNIQUE, WHICH USES A SINGLE LASER TO BOTH PERTURB MOLECULAR LEVEL POPULATIONS AND DETECT THIS PERTURBATION, HAS SEVERAL FEATURES THAT MAKE IT ATTRACTIVE FOR THE QUANTITATIVE DETECTION OF TRANSIENT SPECIES IN COMBUSTION AND OTHER REACTIVE SYSTEMS. AMONG ITS MOST ATTRACTIVE FEATURES IS ITS ABILITY TO MEASURE AN ABSOLUTE SPECIES CONCENTRATION, WITHOUT A PRIOR KNOWLEDGE OF THE MOLECULAR ABSORPTION COEFFICIENT, UNDER THE CONDITION THAT AN INDEPENDENT MEASUREMENT OF DIRECT TRANSMISSION PROVIDES A SECOND EQUATION BY WHICH THE UNKNOWN ABSORPTION CROSS-SECTION MAY BE ELIMINATED, IN THE ONE APPLICATION TO A COMBUSTION SYSTEM SO FAR ATTEMPTED, THE TECHNIQUE'S SENSITIVITY HAS BEEN EQUAL TO SUCH METHODS AS LASER INDUCED FLUORESCENCE, WITHOUT ITS DIFFICULTIES IN QUANTIFICATION. SINCE THE EFFECT IS GENERATED ONLY IN THE SMALL VOLUME DEFINED BY THE FOCUSING OF PUMP AND PROBE LASER BEAMS, THE TECHNIQUE PROVIDES BOTH A POINT MEASUREMENT CAPABILITY AND THE ACCESSIBILITY ASSOCIATED WITH ALMOST COLLINEAR LASER BEAMS.

* information listed above is at the time of submission.

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