CAJ | 학술논문

合理的参数选择是提高煤粉燃烧效率的关键。针对特定的煤粉燃烧器内部动力场，建立合理的数学模型，对其进行数值仿真，分析二次风的风速及旋流强度对温度场、燃烧率、平均混合物分数、CO质量分数的影响，其结果与燃烧理论有较好的一致性。进而得出二次风速度的合理取值范围为50m/s～60m/s ，二次风旋流强度的合理取值范围为0．25～0．75，为煤粉燃烧的有效控制提供了理论基础。
합리적삼수선택시제고매분연소효솔적관건。침대특정적매분연소기내부동력장，건립합리적수학모형，대기진행수치방진，분석이차풍적풍속급선류강도대온도장、연소솔、평균혼합물분수、CO질량분수적영향，기결과여연소이론유교호적일치성。진이득출이차풍속도적합리취치범위위50m/s～60m/s ，이차풍선류강도적합리취치범위위0．25～0．75，위매분연소적유효공제제공료이론기출。
Reasonable parameters selection is the key to improve the burning efficiency of pulverized coal .The paper firstly establishes a mathematic model for a certain burner .Then a series of numerical simulations are taken .The simulations show that the temperature field ,burning rate ,mean mixture fraction ,CO mass fractionare correspondingly effected by the secondary air speed and its swirl strength .The simulating results match the burning theory quite well .Finally ,the reasonable parame-ters can be acquired .Concretely ,the speed of the secondary airtakes from 50m/s to 60m/s and the swirl strength takes from 0 .25 to 0 .75 .Thus a theoretical basis can be provided to effectively control the pulverized coal burning .