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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Combustion
Journal Basic Information
Journal DOI :
The Korean Society of Combustion
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Volume & Issues
Volume 1, Issue 2 - Dec 1996
Volume 1, Issue 1 - Jul 1996
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A Study on the Development of a Recuperative Burner ( I )
Park, Byung-Sik ; Kim, Won-Bae ; Chung, Dae-Hun ; Kim, Yoo ;
Journal of the Korean Society of Combustion, volume 1, issue 2, 1996, Pages 1~7
A recuperative, burner in the capacity of 400kW was designed using the design data from the experimental results. Performance tests on this burner were made. The exhaust gas analysis, including NOx, the measurement of the flame temperature and velocity in the recuperative burner were the main topics of hot combustion tests. Design data from the experimental results are the gas velocity, air velocity, the tip location of gas nozzle and the dimension of furnace. In view of uniform temperature distribution and thermal efficiency, it is appropriate to maintain the furnace pressure at 2-3mmAq.
Study on Mobile Broadband Coherent Anti-Stokes Raman Spectrometer For Combustion Diagnostics
Park, Chul-Woung ; Park, Seung-Nam ; Hahn, Jae-Won ; Lee, Jong-Ung ;
Journal of the Korean Society of Combustion, volume 1, issue 2, 1996, Pages 9~20
We construct a mobile broadband coherent anti-Stokes Raman spectroscopy system to measure the temperature of combustion gases. To improve the accuracy of CARS temperatures due to Stokes lasers, a modeless dye laser is constructed. A monochromator to disperse CARS spectra is also constructed in the spectrometer for easy portability. The accuracy of CARS temperature, measured in graphite tube furnace in reference to a radiation pyrometer, is better than 2 % from 1000 K to 2400 K. The CARS temperature error due to the variation of the spectral distribution of the modeless laser is measured to be less than 1.5 % during five hours operation. As a demonstration of combustion diagnosis, we applied the spectrometer to measure the temperature distribution of the propane air premixed flame.
Flame Propagation Characteristics of Propane-Air Premixed Mixtures
Bae, Choong-Sik ;
Journal of the Korean Society of Combustion, volume 1, issue 2, 1996, Pages 21~29
Flame propagation characteristics of propane-air mixtures were experimentally investigated in constant-volume combustion chambers. Flame propagation process was observed as a function of mixture strength, initial mixture temperature and initial mixture pressure in quiescent mixtures. A cylindrical combustion chamber and a spherical combustion chamber contain a pair of parallel windows through which optical access into the chamber can be provided. Laser two beam deflection method was adopted to measure the local flame propagation, which gave information on the flame size and flame propagation speed. Pressure development was also measured by a piezoelectric pressure transducer to characterize combustion in quiescent mixtures. Burning velocity was calculated from flame propagation and pressure measurements. The effect of flow on flame propagation was also investigated under flowing mixture conditions. Laser two beam method was found to be feasible in measuring flame propagation of quiescent mixtures. Flame was observed to propagate faster with higher initial mixture temperature and lower initial pressure. Combustion duration was shortened in the highly turbulent flowing mixtures.
The study on the development of perforated can-type burner for condensing gas boiler
Chung, O.G. ; Kum, S.M. ; Lee, C.E. ; Ohu, S.C. ;
Journal of the Korean Society of Combustion, volume 1, issue 2, 1996, Pages 31~39
This study was carried out to delvelop the burner for condensing gas boiler which can save energy by utilizing latent heat of combustion gas. A perforated can-type burner adopting premixed flame was chosen to reduce NOx emission and to simplify the manufacturing process. Basic experiments using unit cell combustor have been conducted to obtain data about the design parameters of perforated burner surface which can make stable flame for a wide operating conditions. Can-type burners designed on the basis of above data shows that flames are stable and also CO and NOx emission are low for a wide operating range.
Nondimensional Analysis of Periodically Unstable Shock-Induced Combustion
Choi, Jeong-Yeol ; Jeung, In-Seuck ; Yoon, Young-Bin ;
Journal of the Korean Society of Combustion, volume 1, issue 2, 1996, Pages 41~49
A numerical study is conducted to investigate the periodically unstable shock induced combustion around blunt bodies in stoichiometric hydrogen-air mixtures. Euler equations are spatially discretized by upwind-biased third order scheme and temporally integrated by Runge-Kutta method. Chemistry model used in this study involves 8 elementary kinetics steps and 7 species. At a constant Mach number, the effects of projectile size, inflow pressure and inflow temperature are examined with Lehr#s experimental condition as a reference. In addition to oscillation frequency, characteristic distances and time averaged values are found from the result to find an relation with dimensionless parameters. As a result, it is found that the effects of inflow pressure and body size are very similar and
number plays an important role in determining the instability characteristics.
A Study on Application and Validation of the Coherent Flamelet Model in Counterflow Turbulent Premixed Combustion
Choi, C.R. ; Huh, K.Y. ;
Journal of the Korean Society of Combustion, volume 1, issue 2, 1996, Pages 51~58
The coherent flamelet model(CFM) is applied to symmetric counterflow turbulent premixed flames. The flame source term is set proportional to the turbulence intensity to reproduce the experimental correlation of Abdel-Gayed et al. for the turbulent burning velocity. Flame quenching by the turbulent rate of strain is modeled by an additional multiplication factor to the flame source term. A modified form of CFM is employed to consider coexistence of burned and unburned premixture with ambient air. The predicted flame position and turbulent flow field coincide well with the experimental data of Kostiuk et al., although there is some discrepancy in the radial rms velocity component and integral length scale near the symmetric plane.