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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

Texto completo
Autor(es):
Oliveira, C. [1, 2] ; Reis, Jr., J. L. [2, 3] ; Souza-Correa, J. A. [1] ; Dal Pino, Jr., A. [2] ; Amorim, J. [1, 2]
Número total de Autores: 5
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF PHYSICS D-APPLIED PHYSICS; v. 45, n. 25 JUN 27 2012.
Citações Web of Science: 5
Resumo

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)

Processo FAPESP: 08/58195-3 - Etanol: utilização do etanol como combustível: ignição a plasma de motores veiculares
Beneficiário:Jayr de Amorim Filho
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Regular