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http://dx.doi.org/10.3795/KSME-B.2004.28.3.359

Experiment on the Characteristics of Jet Diffusion Flames with High Temperature Air Combustion  

Cho, Eun-Seong (서울대학교 기계항공공학부 대학원)
Ohno, Ken (일본 동북대학교 유체과학연구소)
Kobayashi, Hideaki (일본 동북대학교 유체과학연구소)
Chung, Suk-Ho (서울대학교 기계항공공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.3, 2004 , pp. 359-364 More about this Journal
Abstract
For the development of high efficiency and low emission combustion systems, high temperature air combustion technology has been tested by utilizing preheated air over 1100 K and exhaust gas recirculation. In this system, combustion air is diluted with large amount of recirculated exhaust gases, such that the oxygen concentration is relatively low in the reaction zone, leading to low flame temperature. Since, the temperature fluctuations and sound emissions from the flame are small and flame luminosity is low, the combustion mode is expected to be flameless or mild combustion. Experiment was performed to investigate the turbulent flame structure and NO$_x$ emission characteristics in the high temperature air combustion focused on coflowing jet diffusion flames which has a fundamental structure of many practical combustion systems. The effect of turbulence has also been evaluated by installing perforated plate in the oxidizer inlet nozzle. LPG was used as a fuel. Results showed that even though NO$_x$ emission is sensitive to the combustion air temperature, the present high temperature air combustion system produce low NO$_x$ emission because it is operated in low oxygen concentration condition by the high exhaust gas recirculation.
Keywords
High Temperature Air Combustion; NO$_x$ Emission; Flue Gas Recirculation; Laser Doppler Velocimeter;
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  • Reference
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