Intracavity laser absorption spectroscopy of NH2 in methane/air flames doped with N2O, NO and NH3

I. Rahinov; N. Ditzian; A. Goldman; S. Cheskis

Intracavity laser absorption spectroscopy of NH₂ in methane/air flames doped with N₂O, NO and NH₃

I. Rahinov, N. Ditzian, A. Goldman, S. Cheskis

Research output: Contribution to conference › Paper › peer-review

Abstract

Intracavity Laser Absorption Spectroscopy (ICLAS) was used to measure concentration profiles of NH₂ in low pressure (30 Torr) methane/oxygen/nitrogen flames doped with small amounts of N₂O, NO, NH₃. The effective optical length of ICLAS, which dictates the sensitivity of the method, was controlled by the generation time of the quasi cw-laser. The effective optical length of 0.87 km, reached at generation time of 75 μsec, provided very high sensitivity: from 5 × 10¹⁰ molec/cc at 500 K in the vicinity of burner ≤ 2 × 10¹¹ molec/cc in the burnt gas zone. The radial profile of NH₂, measured using a tomographic technique, indicated that the radical is located mainly inside a cylinder with diameter equal to the burner diameter. In the ammonia doped flame the calculations predicted an additional concentration maximum located close to the burner. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).

Original language	English
Pages	36
Number of pages	1
State	Published - 2004
Externally published	Yes
Event	30th International Symposium on Combustion, Abstracts of Symposium Papers - Chicago, IL, United States Duration: 25 Jul 2004 → 30 Jul 2004

Conference

Conference	30th International Symposium on Combustion, Abstracts of Symposium Papers
Country/Territory	United States
City	Chicago, IL
Period	25/07/04 → 30/07/04

Bibliographical note

Funding Information:
This research was supported by the Israel Science Foundation (Grant No. 574/00) and by the James Franck, German-Israeli Binational Program in Laser Matter Interaction.

Cite this

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title = "Intracavity laser absorption spectroscopy of NH2 in methane/air flames doped with N2O, NO and NH3",

abstract = "Intracavity Laser Absorption Spectroscopy (ICLAS) was used to measure concentration profiles of NH2 in low pressure (30 Torr) methane/oxygen/nitrogen flames doped with small amounts of N2O, NO, NH3. The effective optical length of ICLAS, which dictates the sensitivity of the method, was controlled by the generation time of the quasi cw-laser. The effective optical length of 0.87 km, reached at generation time of 75 μsec, provided very high sensitivity: from 5 × 1010 molec/cc at 500 K in the vicinity of burner ≤ 2 × 1011 molec/cc in the burnt gas zone. The radial profile of NH2, measured using a tomographic technique, indicated that the radical is located mainly inside a cylinder with diameter equal to the burner diameter. In the ammonia doped flame the calculations predicted an additional concentration maximum located close to the burner. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).",

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year = "2004",

language = "אנגלית",

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T1 - Intracavity laser absorption spectroscopy of NH2 in methane/air flames doped with N2O, NO and NH3

AU - Rahinov, I.

AU - Ditzian, N.

AU - Goldman, A.

AU - Cheskis, S.

PY - 2004

Y1 - 2004

N2 - Intracavity Laser Absorption Spectroscopy (ICLAS) was used to measure concentration profiles of NH2 in low pressure (30 Torr) methane/oxygen/nitrogen flames doped with small amounts of N2O, NO, NH3. The effective optical length of ICLAS, which dictates the sensitivity of the method, was controlled by the generation time of the quasi cw-laser. The effective optical length of 0.87 km, reached at generation time of 75 μsec, provided very high sensitivity: from 5 × 1010 molec/cc at 500 K in the vicinity of burner ≤ 2 × 1011 molec/cc in the burnt gas zone. The radial profile of NH2, measured using a tomographic technique, indicated that the radical is located mainly inside a cylinder with diameter equal to the burner diameter. In the ammonia doped flame the calculations predicted an additional concentration maximum located close to the burner. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).

AB - Intracavity Laser Absorption Spectroscopy (ICLAS) was used to measure concentration profiles of NH2 in low pressure (30 Torr) methane/oxygen/nitrogen flames doped with small amounts of N2O, NO, NH3. The effective optical length of ICLAS, which dictates the sensitivity of the method, was controlled by the generation time of the quasi cw-laser. The effective optical length of 0.87 km, reached at generation time of 75 μsec, provided very high sensitivity: from 5 × 1010 molec/cc at 500 K in the vicinity of burner ≤ 2 × 1011 molec/cc in the burnt gas zone. The radial profile of NH2, measured using a tomographic technique, indicated that the radical is located mainly inside a cylinder with diameter equal to the burner diameter. In the ammonia doped flame the calculations predicted an additional concentration maximum located close to the burner. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).

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ER -

Intracavity laser absorption spectroscopy of NH₂ in methane/air flames doped with N₂O, NO and NH₃

Abstract

Conference

Bibliographical note

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