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Basic equations and calculation procedure for analysis of gas flow properties in tuyère under the influence of heat source
Author(s) -
Wei JiHe,
Xiang ShunHua,
Fan YangYi,
Yu NengWen,
Ma JinChang,
Yang SenLong
Publication year - 2001
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.200100101
Subject(s) - thermodynamics , chemistry , heat transfer , physics
Based on fundamentals of the dynamics and thermodynamics of compressible fluid flow as well as heat transfer, the basic equations and formulae for characterizing and calculating the gas flow properties in tubular and annular type tuyères (constant cross‐sectional area lances) under the influence of a heat source are derived. The calculation procedures of the properties at different discharge states through a tuyère are given. For the case of an annular‐tube type tuyère used for an AOD (argon‐oxygen decarburization) vessel of 18 t capacity, the distributions of the inner wall temperatures of the tuyère and the gas stagnation temperatures along its length have been more reasonably determined. The friction coefficients of its main tuyère and subtuyère to the gas flows during injection refining have been fixed by comparison of the pressure‐flowrate ( P‐Q ) experimentally measured in relationship to the results of trial calculations.