摘要
采用独立开发的组合坐标网格体系、强非均匀的交错网格划分及交错计算的数值计算方法，对具有复杂结构的燃烧器喷嘴及其四角射流切圆燃烧的大型锅炉炉膛的三维流场特性进行了详细计算，较好地解决了在所有计算区域由于合速度方向与网格线方向之间有较大夹角而产生的伪扩散问题，同时与工业性试验的结果相对照，证明了该数值模拟方法可以较准确地反映实际炉内燃烧区域的流场特征，较好地实现了近流线的数值计算。
A numerical simulation method incorporating a composite coordinates grid system, strong non uniform staggered grid arrangement and a staggered calculation mode was described in this paper. This method has been employed for the first time to perform a detailed computation of the three dimensional flow field characteristics of a large sized boiler furnace. The latter features a tangential firing mode with the use of burner nozzles of a sophisticated construction. Because of this, the false diffusion problem in the calculation domain caused by a relatively large included angle between a resultant speed direction and grid line one has been solved relatively well. Furthermore, a comparison with industrial test results shows that the numerical simulation method can quite accurately reflect the flow field characteristics in a boiler furnace combustion zone. A quasi streamline numerical simulation is thus effectively realized.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2000年第1期47-49,共3页
Journal of Engineering for Thermal Energy and Power
关键词
伪扩散
近流线方法
四角切圆燃烧
燃烧炉
炉膛
numerical simulation, false diffusion, quasi streamline method, tangential firing
