Go to the main menu
Skip to content
Go to bottom
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 12, Issue 4 - Dec 2007
Volume 12, Issue 3 - Sep 2007
Volume 12, Issue 2 - Jun 2007
Volume 12, Issue 1 - Mar 2007
Selecting the target year
CO Two-photon Laser Induced Fluorescence Measurements in High Temperature and Pressure Conditions
Oh, Seung-Mook ; Kim, Duk-Sang ; Miles, Paul C. ; Colban, Will F. ;
Journal of the Korean Society of Combustion, volume 12, issue 4, 2007, Pages 1~7
Carbon monoxide (CO) is not only an important intermediate species in chemical reaction mechanisms of hydrocarbon fuel combustion, but also a crucial pollutant species emitted from automotive engines. To better understand the physical processes impacting CO emissions, the development of laser-based measurement techniques that can visualize in-cylinder CO distributions is desirable. Among these techniques, Laser-Induced Fluorescence (LIF) is a sensitive and species-selective detection technique capable of good spatial resolution. However, some technical matters such as deep UV excitation, severe pressure dependency of the LIF signal, and potential interference from other species have been major challenges for CO LIF application. This study is focused on investigating the feasibility of CO two-photon LIF in a direct-injection diesel engine operating at typical pressure and temperature conditions with commercial grade diesel fuel. Spectroscopic analysis shows that the CO fluorescence signal can be separated from
Swan band or broadband fluorescence from PAHs when the signal is collected near 483 nm. The signal-to-noise ratio of CO LIF deteriorate rapidly as pressure is increased, following
which matches the theoretical signal pressure dependency.
Development of Plasma Assisted Burner for Regeneration of Diesel Particulate Filter
Cha, Min-Suk ; Lee, Dae-Hoon ; Kim, Kwan-Tae ; Lee, Jae-Ok ; Song, Young-Hoon ; Kim, Seock-Joon ;
Journal of the Korean Society of Combustion, volume 12, issue 4, 2007, Pages 8~13
Plasma assisted combustion is an old subject for the combustion society, but recently, the subject is refocused partly because techniques for non-thermal plasmas are progressed significantly, and partly because there are lots of applications which need to be overcome by a new reaction technology. In the present study, we have developed plasma assisted burner (plasma burner), which can be used as a heating source in a diesel particulate filter system. The burner can burn 20-60 cc/min of diesel fuel with 50 lpm of fresh air in an exhaust pipe of 2.0 liter diesel engine. Using 20 cc/min of diesel fuel, an exhaust temperature for 2.0 liter diesel engine can be raised up to around
for a wide range of engine speed (idle-3,000 rpm). The characteristics of the plasma burner are reported, and the possible operating mechanism of it will be discussed based on the effects of an electric field and a plasma on flames.
The Effect of Hybrid Reburning on NOx Reduction in Oxygen-Enriched LPG Flame
Lee, Chang-Yeop ; Baek, Seung-Wook ;
Journal of the Korean Society of Combustion, volume 12, issue 4, 2007, Pages 14~21
In order to enhance combustion efficiency, oxygen-enriched combustion is used by increasing the oxygen ratio in the oxidizer. However, since the flame temperature increases, NOx formation in the furnace seriously increases for low oxygen enrichment ratio. In this case, reburning is a useful technology for reducing nitric oxide. In this research, experimental studies have been conducted to evaluate the hybrid effects of reburning/selective non-catalytic reaction (SNCR) and reburning/air staging on NOx formation and also to examine heat transfer characteristics in various oxygen-enriched LPG flames. Experiments were performed in flames stabilized by a co-flow swirl burner, which were mounted at the bottom of the furnace. Tests were conducted using LPG gas as main fuel and also as reburn fuel. The paper reported data on flue gas emissions, temperature distribution in furnace and various heat fluxes at the wall for a wide range of experimental conditions. Overall temperature in the furnace, heat fluxes to the wall and NOx generation were observed to increase by low level oxygen-enriched combustion, but due to its hybrid effects of reburning, SNCR and Air staging, NOx concentration in the exhaust have decreased considerably.
NOx Reduction Study in Oscillating Combustion Burner
Kang, Sang-Koo ; Azimov, U.B. ; Kim, Ki-Seong ;
Journal of the Korean Society of Combustion, volume 12, issue 4, 2007, Pages 22~30
The NOx emission characteristics were studied in an oscillating combustion burner equipped with a specially designed proportioning valve. The effects of various parameters on the NOx emission which are important in oscillating combustion were investigated. Also, the effects of coincident application of flue gas recirculation(FGR) were evaluated. The results show that oscillating combustion is an efficient tool for reducing NOx in the burner. Up to 53% of NOx reduction could be acquired in low frequency and small duty ratio conditions. The coincident application of FGR further reduced the NOx emission up to 74%. Thus, this study assured that oscillating combustion technology with FGR could be a fascinating method for NOx reduction in industrial burners.
A Numerical Study on Flame Stability with Extended Combustor in Superdetonative Mode Ram Accelerator
Sung, Kun-Min ; Jeung, In-Seuck ;
Journal of the Korean Society of Combustion, volume 12, issue 4, 2007, Pages 31~38
An numerical study was conducted on superdetonative mode ram accelerator with length extended combustor. The computation condition was based on ISL's RAMAC30 II S225 experiment. For 50% length increased combustor, flame is not sustained. For the case of 60% and 70% increase, flame is successfully sustaind. But detonation wave is oscillating and acceleration is fluctuating. Extention of combustor is helpful for sustaing detonation wave but it may cause unstart.
A Study on a Combined DeNOx Process of Plasma Oxidation and
SCR for Diesel Engine
Song, Young-Hoon ; Lee, Jae-Ok ; Cha, Min-Suk ; Kim, Seock-Joon ; Ryu, Jeong-In ;
Journal of the Korean Society of Combustion, volume 12, issue 4, 2007, Pages 39~46
The technique of
SCR (selective catalytic reduction) assisted by plasma oxidation has been applied to a 2,000 cc diesel engine. The present combined
process consists of two steps. The first step is that about 50% of emitted NO from the engine is oxidized to
in a plasma oxidation process. The second step is that NO and
are simultaneously reduced to
SCR process. The engine test results showed that the
rates of the present combined process are higher than those of conventional SCR process by 20%. Such a high performance of the combined process is noticeable especially, when the exhaust temperature are relatively low, i.e.,
. To provide a feasibility of the present technique the effects of operating conditions, such as an electrical input energy, an exhaust gas temperature, an initial NO concentration, and the amount of hydrocarbon addition, were discussed.
Refined Fuel Production Using Municipal Sewage Sludge(I) - Preparation of Refined Solid Fuels from Organic Sludge -
Kang, S.K. ; Lee, S.J. ; Ryu, I.S. ; Lee, K.C. ;
Journal of the Korean Society of Combustion, volume 12, issue 4, 2007, Pages 47~56
Utilization of sewage sludge for industrial fuel should be considered in appropriate calory with low emission of environmental pollutants and the amount of sewage sludge for continuously long-time operation. For the low grade fuel(<4,000kcal/kg), one of proper processes is that coal and oil are added into sewage sludge to remove impurities and increase calory(>7,000kcal/kg) and the amount of fuel having sewage sludge. Recently, 2-step agglomeration has been attempted by secondarily agglomerate sewage sludge onto the primary nuclei formed by agglomeration of coal and oil. Furthermore, sawdust and waste oil can substitute about 1/3 each for coal and mineral oil consumed in this process, which will lead to securing alternative energy resources from environmental pollutants as well as cost reduction.
An Equilibrium Analysis to Generate Syngas in the Pyrolysis and Gasification of Refuse Plastic Fuel
Kang, Pil-Sun ; Bae, Su-Woo ; Song, Soon-Ho ; Hwang, Jung-Ho ;
Journal of the Korean Society of Combustion, volume 12, issue 4, 2007, Pages 57~61
The aim of this study is to find out the condition that generates maximum
through the calculation of equilibrium model with conditions of pyrolysis gases of Refuse Plastic Fuel(RPF). This study deals with the computational simulation of a RPF gasification using an equilibrium model based on minimization of the Gibbs free energy. An equilibrium analysis was carried out to determine species composition of Syngas in RPF gasification and reactions to variation of temperature,
ratio and Steam/Fuel ratio. Calculated results shows that hydrocarbons in pyrolyzed gas are converted to synthesis gas which is formed on hydrogen and carbon monoxide.