ボイラ火炉内の伝熱シミュレ-ションに関する研究

概要

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Heat transfer simulation method in boiler furnace was developed to obtain temperature distribution and heat absorbing rate distribution in the furnace. The results were compared with experimental data from a small boiler for heavy oil. The method analyzes simultaneously the three dimensional viscous flow by vector potential method, combustive heat generating rate by a flame model with Wiebe's function, three dimensional radiative heat transfer by Monte Carlo method, and convective heat transfer and enthalpy transport due to the flow by finite difference method. Following results were obtained by this simulation.<BR>(1) The effects on in-furnace heat transfer of the flow pattern are rather small compared with the effects of the heat generating rate distribution.<BR>(2) Heat generating rate in boiler furnaces were made possible to be estimated by determining the Wiebe's function's parameters in the flame model by comparing the analytical results with the experimental one's.<BR>(3) Relationship among the heat generating rate and the fuel flow rate and the air fuel ratio was investigated, and by using this, analytical results of temperature and heat absorbing rate distributions were obtained with practically sufficient degree of accuracies compared with the experimental results.
公益社団法人日本マリンエンジニアリング学会の論文