Laser Spark Plug Development and Engine Testing: Design of a diode side pumped solid state passively Q-switched laser for use as an ignition source for a lean-burn stationary natural gas engine - Couverture souple

McIntyre, Dustin

 
9783639113624: Laser Spark Plug Development and Engine Testing: Design of a diode side pumped solid state passively Q-switched laser for use as an ignition source for a lean-burn stationary natural gas engine
Couverture souple
ISBN 10 : 3639113624 ISBN 13 : 9783639113624
Editeur : VDM Verlag Dr. Müller, 2008

Synopsis

To meet the ignition system needs of future lean- burn natural gas engines a diode side pumped, passively Q-switched, Nd:YAG laser was developed and tested. Laboratory experimentation used a wide range of input parameters that when combined produced brilliant sparks in air. The results show a strong dependence of the output on the output coupler reflectivity, Q-switch initial transmission, and gain media dopant concentration. The results show peak power levels of up to 3MW and peak focal intensities of up to 560 GW/cm2. Engine testing was performed on a Ricardo Proteus single cylinder research engine. The engine testing consisted of a comparison of the in-cylinder, and emissions behavior. All engine parameters were kept as constant and the equivalence ratio was varied between 0.8, 0.9, and 1.0. The test laser was constructed with a 30% output coupler, 32% Q-switch initial transmission, and a 0.5% Nd concentration rod all pumped by approximately 1000 Watts of optical power. The test laser single mode output pulse had an energy of 23 mJ, with a pulsewidth of 10 ns, and an M2 value of 6.55. This output produced focal intensity of 270 GW/cm2.

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Présentation de l'éditeur

To meet the ignition system needs of future lean- burn natural gas engines a diode side pumped, passively Q-switched, Nd:YAG laser was developed and tested. Laboratory experimentation used a wide range of input parameters that when combined produced brilliant sparks in air. The results show a strong dependence of the output on the output coupler reflectivity, Q-switch initial transmission, and gain media dopant concentration. The results show peak power levels of up to 3MW and peak focal intensities of up to 560 GW/cm2. Engine testing was performed on a Ricardo Proteus single cylinder research engine. The engine testing consisted of a comparison of the in-cylinder, and emissions behavior. All engine parameters were kept as constant and the equivalence ratio was varied between 0.8, 0.9, and 1.0. The test laser was constructed with a 30% output coupler, 32% Q-switch initial transmission, and a 0.5% Nd concentration rod all pumped by approximately 1000 Watts of optical power. The test laser single mode output pulse had an energy of 23 mJ, with a pulsewidth of 10 ns, and an M2 value of 6.55. This output produced focal intensity of 270 GW/cm2.

Biographie de l'auteur

The author received a BSEE and a BSCpE in 1998 and an MSME in August of 2000 “The Coaxial Cavity Resonator as a Prototype RF IC Ignition System.” He completed his PhD in May 2007 “A Laser Spark Plug Ignition System for a Stationary Lean-Burn Natural Gas Reciprocating Engine”. He currently works as a researcher with the USDOE NETL.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
VDM Verlag Dr. Müller
Date d'édition
2008
Langue
anglais
ISBN 10 
3639113624
ISBN 13 
9783639113624
Reliure
Broché
Nombre de pages
224
Coordonnées du fabricant
non disponible
Personne responsable
non disponible