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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Combustion
Journal Basic Information
Journal DOI :
The Korean Society of Combustion
Editor in Chief :
Volume & Issues
Volume 8, Issue 3 - Sep 2003
Volume 8, Issue 2 - Jun 2003
Volume 8, Issue 1 - Mar 2003
Selecting the target year
Flame Structure of Fuel-rich
Premixed Flame with Oxygen Enrichment
Lee, Ki-Yong ; Kwon, Young-Suk ;
Journal of the Korean Society of Combustion, volume 8, issue 2, 2003, Pages 1~6
Numerical simulations are conducted at atmospheric pressure in order to understand the effect of the oxygen enrichment level on structure of
premixed flames. Under several equivalence ratios the flame speeds are calculated and compared with those obtained from the experiments, the results of which are in good agreement. The effects of the oxygen enrichment are investigated on flames under fuel-rich conditions. As the oxygen enrichment level is increased from 0.21 to 1, the flame speed and the temperature are increased. The emission index of
is decreased in cases of flames for fuel rich mixtures, so the efficiency of combustion may be decreased. The maximum emission index of NO is obtained for 0.6 of the oxygen enrichment level.
Distribution of Pollutant on the Indoor Air of Passenger Car
So, Jin-Sub ; Chun, Chul-Kyun ; Park, Chan-Su ; Choi, Ju-Seok ;
Journal of the Korean Society of Combustion, volume 8, issue 2, 2003, Pages 7~16
The transfer of air pollutants between passenger room and service room in train are investigated by the computational analysis. The effects of service room temperature, inlet velocity, initial concentration and heating are studied. The flow induced by the difference of density between two rooms is found to take the major role in transfer of polluted air. Low temperature of service room enhances the polluted air flow into passenger room along the floor. Exhaust fan above the door between two rooms is not effective for this case. Strong inlet flow is found to suppress polluted air flow from service room. The heating of passenger room can promote air pollution.
The Effects of Droplet Arrangement on the Vaporization and Combustion Characteristics of Liquid Fuel Droplets
Cho, Chong-Pyo ; Kim, Ho-Young ;
Journal of the Korean Society of Combustion, volume 8, issue 2, 2003, Pages 17~26
The objective of present study is to understand the interaction of burning droplets in air stream for various droplet arrangement. The unsteady combustion of linearly arranged droplets with a convective flow has been studied numerically. The droplets with spacing of
horizontally and with spacing of
vertically are studied. The effects of Reynolds number, horizontal spacing, and vertical spacing on the interaction of burning droplets are examined. The results indicate that the droplet burning behavior is influenced by Reynolds number and relative location of droplets in the array. The interaction of droplets is increased for arrays with smaller droplet spacing. The vaporization of droplets in the array is varied with both horizontal and vertical spacing exponentially.
Effects of Catalyst Metal and Substrate Temperature on a Flame Synthesis of Carbon Nanomaterials
Lee, Gyo-Woo ; Jurng, Jong-Soo ; Hwang, Jung-Ho ;
Journal of the Korean Society of Combustion, volume 8, issue 2, 2003, Pages 27~33
Synthesis of carbon nanomaterials on a metal substrate by an ethylene fueled inverse diffusion flame was illustrated. Stainless steel plates were used for the catalytic metal substrate. The effects of catalyst metal particles were investigated through
(ferric nitrate, nonahydrate) and
(nickel nitrate, hexahydrate). Carbon nanotubes and nanofibers with diameters of
were found on the substrate for the case of using SUS304 substrates only and using them with metal nitrates. In case of using metal nitrates, due to the easy activation of the metal particles, the formation and growth of carbon nanomaterials were occurred in the lower temperature region than that of using SUS304 substrates only.
Studies on the clinker formed in thermal power plants
Park, Hyun-Joo ; Nam, Chang-Hyun ; Yun, Yeo-Chan ; Lee, Tae-Won ;
Journal of the Korean Society of Combustion, volume 8, issue 2, 2003, Pages 34~40
Analyses for concentration, surface phenomena, and crystal structure were performed to identify the causes of clinker formation in three type of pulverized coal fired boilers. Some clinkers had partially molten surface and more CaO and
as compared with fly ash, and the major crystalline phases identified in the clinker were mullite and quartz. Clinkers were formed in high temperature zone of the boiler according to the identification of mullite by XRD. Free
in sand combined with K, Na and Ca in limestone served as a fluxing agent to form clinkers in a circulating bed boiler.
Application of Ultrasonic for agglomeration of fine soot particles
Jeong, Sang-Hyun ; Hong, Won-Seok ; Shim, Sung-Hun ; Kim, Yong-Jin ; Lee, Sung-Bum ;
Journal of the Korean Society of Combustion, volume 8, issue 2, 2003, Pages 41~49
Ultrasonic field of 28kHz with sound pressure level 162dB has been employed to agglomerate the fine soot particle produces in a diffusion flame in a chamber. The agglomeration process has been investigated with digital camcorder and analysed in terms of the decrease of number density with exposure time. From the observation of agglomeration process, the initial agglomeration has been carried out during the short time, and it has been dominated by the orthokinetic collision. Thereafter, a slower agglomeration mechanism, driven by acoustic streaming in the chamber takes over and agglomeraters grew to diameters of several millimeters were levitated at the pressure node of the acoustic wave. And, the circular disk shape of large agglomeraters with the rotational and translational motion is observed.
Flame Synthesis of Carbon Nanofibers using SUS304 Substrates
Lee, Gyo-Woo ; Jurng, Jong-Soo ; Hwang, Jung-Ho ;
Journal of the Korean Society of Combustion, volume 8, issue 2, 2003, Pages 50~55
Synthesis of carbon nanofibers on a metal substrate by an ethylene fueled inverse diffusion flame was observed. Stainless steel plates were used for the catalytic metal substrate. The effects of radial distance and residence time of the substrate were investigated. The role of hydrocarbon composition in the fuel was also viewed. Nanofibers with a diameter range of 30-70nm were found on the substrate. The carbon nanofibers were formed and grown in the region from 4 to 5.5mm from the central axis of a flame outside of the visible flame front in the radial direction. The minimum residence time required for the formation of carbon nanofibers were about 20 seconds, and over 60 seconds were required for the full-scale growth. The characteristic time of the formation of carbon nanofibers was much shorter than that of the substrate temperature growth. In this study, the variation in hydrocarbon composition had no significant effect on the formation and growth of the carbon nanofibers.