Experimental study of pulsed microwave discharges at pressures ranging over five orders of magnitude - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Plasma Sources Science and Technology Année : 2019

Experimental study of pulsed microwave discharges at pressures ranging over five orders of magnitude

Mhedine Ali Cherif
  • Fonction : Auteur
Yuji Ikeda
  • Fonction : Auteur

Résumé

Microwave discharge igniter (MDI) is a discharge system developed to initiate combustion in automotive engines. The MDI uses a sequence of N = 700 microwave (2.45 GHz) pulses 100 ns in duration separated by 1 μs. The initial breakdown is provided by the first microwave pulse, 5 μs in duration. The aim of pulsing the microwave signal is to keep an optimal combination of parameters when, even at elevated pressures, (i) the discharge propagates over the largest possible volume; (ii) the plasma is non-equilibrium. Properties of plasma produced by MDI igniter in non-combustible gas mixtures at ambient gas temperature and gas pressure in the range between 0.2 mbar and 8 bar were studied experimentally. Discharge spatial structure was analyzed with the help of time-resolved ICCD imaging. Near-UV optical emission spectra taken in different pulses provided the information about rotational and vibrational temperatures. The electric field was estimated on the basis of ratio of emission of the second positive and the first negative systems of molecular nitrogen.
Fichier principal
Vignette du fichier
02_MDI_paper.pdf (3.5 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02406808 , version 1 (23-11-2020)

Identifiants

Citer

S.A. Shcherbanev, Mhedine Ali Cherif, Svetlana Starikovskaia, Yuji Ikeda. Experimental study of pulsed microwave discharges at pressures ranging over five orders of magnitude. Plasma Sources Science and Technology, 2019, 28, 045009 (10pp). ⟨10.1088/1361-6595/aae765⟩. ⟨hal-02406808⟩
20 Consultations
165 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More