No.29 強い旋回流を伴う微粉炭燃焼流の非定常数値シミュレーション(ガス化・燃焼・液化(1))

概要

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Large-eddy simulation (LES) is applied to a pulverized coal combustion field in a combustion test furnace with a practical advanced low NO_x burner called CI-α, and its validity is investigated by comparing with the experiment. The motion of coal particles is calculated by the Lagrangian method with a parcel model. In the coal combustion modeling, three chemical processes are considered, namely devolatilization, char combustion and gaseous combustion. The direct closure SSFRRM (scale similarity filtered reaction rate model) is used as a turbulent combustion model. The results show that a swirling recirculation flow is formed in the central region close to the burner and its size and strength dynamically change with time. The predicted distributions of gaseous temperature and oxygen concentration are in general agreement with the experiment.
一般社団法人日本エネルギー学会の論文
2009-11-26