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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Optical and electrical diagnostics of a spark-plug discharge in air

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Author(s):
Oliveira, C. [1, 2] ; Reis, Jr., J. L. [2, 3] ; Souza-Correa, J. A. [1] ; Dal Pino, Jr., A. [2] ; Amorim, J. [1, 2]
Total Authors: 5
Affiliation:
[1] Lab Nacl Ciencia & Tecnol Bioetanol CTBE CNPEM, BR-13083970 Sao Paulo - Brazil
[2] ITA, Dept Fis, BR-12228900 Sao Paulo - Brazil
[3] Univ Estadual Paulista, BR-12240420 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF PHYSICS D-APPLIED PHYSICS; v. 45, n. 25 JUN 27 2012.
Web of Science Citations: 5
Abstract

Optical and electrical diagnostics were used to investigate a spark discharge using a commercial spark-plug operating in the glow phase regime. Voltage and current were measured in order to characterize the discharge. The gas temperature was estimated as a function of time and duty cycle using ro-vibrational spectra of the second positive system of nitrogen by comparison between experimental and simulated spectra. It was found that 1600 K <= T-g <= 2800 K. The reduced electric field varied between 1 and 1000 Td after the end of the current pulse. Using the line intensity method between one line from the ionic argon and the other from the neutral atom, the electronic temperature was measured and found to be between 17 000 and 20 000 K. The electron density was determined from the broadening of H-alpha line and was found to be 4.0 x 10(14) cm(-3) <= n(e) <= 1.7 x 10(15) cm(-3). (AU)

FAPESP's process: 08/58195-3 - Ethanol aplication as fuel: plasma ignition for vehicle engines
Grantee:Jayr de Amorim Filho
Support type: Program for Research on Bioenergy (BIOEN) - Regular Program Grants