Burned gas characteristics of laminar lifted flame at the beginning of stream heating

Mitsutomo Hirota; O. S.O. Hiroki; Goro Masuya

doi:10.1299/kikaib.76.770_1614

Burned gas characteristics of laminar lifted flame at the beginning of stream heating

Mitsutomo Hirota, O. S.O. Hiroki, Goro Masuya

ENG - Graduate School of Engineering (Common)

Research output: Contribution to journal › Article › peer-review

Abstract

This research experimentally investigates exhaust gas characteristics of a methane-air lifted-jet flame with elevated stream temperature up to 450 K. Emission indices of NO_x and CO were measured by direct gas sampling using a gas detector tube. The index of NO_x decreased or did not change in quantity with increasing stream temperature up to 350 K, and then increased with further temperature increases. The index of CO changed in an opposite manner to that of NO_x with increasing stream temperature. These tendencies demonstrated that the generation of emission gases did not monotonically increase with stream temperature. These non-monotonous behaviors of the emission indices were caused by particular variations of lifted flame height and flame length. In order to examine these flame characteristics, we measured the flame curvature with OH-PLIF and related it to the triple flame height. These flame behaviors could explain the unique emission characteristics of the lifted-jet flame with stream heating.

Original language	English
Pages (from-to)	1614-1619
Number of pages	6
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	76
Issue number	770
DOIs	https://doi.org/10.1299/kikaib.76.770_1614
Publication status	Published - 2010 Oct

Keywords

Combustion products
Heating
Laser
Lifted flame
Premixed combustion

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

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title = "Burned gas characteristics of laminar lifted flame at the beginning of stream heating",

abstract = "This research experimentally investigates exhaust gas characteristics of a methane-air lifted-jet flame with elevated stream temperature up to 450 K. Emission indices of NOx and CO were measured by direct gas sampling using a gas detector tube. The index of NOx decreased or did not change in quantity with increasing stream temperature up to 350 K, and then increased with further temperature increases. The index of CO changed in an opposite manner to that of NOx with increasing stream temperature. These tendencies demonstrated that the generation of emission gases did not monotonically increase with stream temperature. These non-monotonous behaviors of the emission indices were caused by particular variations of lifted flame height and flame length. In order to examine these flame characteristics, we measured the flame curvature with OH-PLIF and related it to the triple flame height. These flame behaviors could explain the unique emission characteristics of the lifted-jet flame with stream heating.",

keywords = "Combustion products, Heating, Laser, Lifted flame, Premixed combustion",

author = "Mitsutomo Hirota and Hiroki, {O. S.O.} and Goro Masuya",

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AU - Hiroki, O. S.O.

AU - Masuya, Goro

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N2 - This research experimentally investigates exhaust gas characteristics of a methane-air lifted-jet flame with elevated stream temperature up to 450 K. Emission indices of NOx and CO were measured by direct gas sampling using a gas detector tube. The index of NOx decreased or did not change in quantity with increasing stream temperature up to 350 K, and then increased with further temperature increases. The index of CO changed in an opposite manner to that of NOx with increasing stream temperature. These tendencies demonstrated that the generation of emission gases did not monotonically increase with stream temperature. These non-monotonous behaviors of the emission indices were caused by particular variations of lifted flame height and flame length. In order to examine these flame characteristics, we measured the flame curvature with OH-PLIF and related it to the triple flame height. These flame behaviors could explain the unique emission characteristics of the lifted-jet flame with stream heating.

AB - This research experimentally investigates exhaust gas characteristics of a methane-air lifted-jet flame with elevated stream temperature up to 450 K. Emission indices of NOx and CO were measured by direct gas sampling using a gas detector tube. The index of NOx decreased or did not change in quantity with increasing stream temperature up to 350 K, and then increased with further temperature increases. The index of CO changed in an opposite manner to that of NOx with increasing stream temperature. These tendencies demonstrated that the generation of emission gases did not monotonically increase with stream temperature. These non-monotonous behaviors of the emission indices were caused by particular variations of lifted flame height and flame length. In order to examine these flame characteristics, we measured the flame curvature with OH-PLIF and related it to the triple flame height. These flame behaviors could explain the unique emission characteristics of the lifted-jet flame with stream heating.

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KW - Laser

KW - Lifted flame

KW - Premixed combustion

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