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Burning Characteristic of LNG‐Oxygen Mixed Gas used for Vacuum Degassing Process
Author(s) -
Hiraoka Teruyoshi,
Ohnuki Kazuo,
Fujii Hiromu,
Fukuda Kazuhisa,
Hoshijima Yousuke
Publication year - 2003
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200300218
Subject(s) - laminar flow , chemistry , nozzle , methane , liquefied natural gas , combustor , oxygen , gas burner , natural gas , analytical chemistry (journal) , thermodynamics , physics , combustion , chromatography , organic chemistry
This study was conducted using LNG (Liquefied Natural Gas) as fuel which has methane gas as its main component, and theoretical and experimental evaluation was made of the burning conditions of LNG‐oxygen mixed gas under atmospheric and subatmospheric pressure in a vacuum chamber used for the RH process. Conclusions reached in this study of the conditions involved in injecting LNG‐oxygen mixed gas in a vacuum chamber of the RH device and burning it near the nozzle outlet to raise the surface temperature of brick were as follows: (1) Laminar burning velocity of mixed gas of LNG and oxygen was fastest when the mixture ratio was 1:2.3, and when the velocity was proportionally related to the square of temperature and 0.5 root of pressure. (2) Turbulent burning velocity u t was calculated from the research results of Andrews. (3) It is possible to calculate the turbulent burning velocity and to evaluate u t / u m which is the index of stability of the burner flame by experimentally obtaining laminar burning velocity.