摘要
通过数值模拟的方法,采用重整化群(RNG)K ε方程,分析了旋流风速度和旋流角的变化对四通道燃烧器的气相流场的影响。结果表明:旋流风速度增大,回流区增大且沿燃烧器径向外移,旋流角减小,回流区增大,沿轴向前移。在此基础上针对低挥发分煤挥发分少,着火点高,燃烬时间长的特点,提出应同时提高旋流风速度和减小旋流角的低挥发分煤燃烧技术,对于工业上合理选择燃烧器的工作参数及燃用低挥发分煤有重要的指导意义。
The effect that the velocity and angle of the swirling gas on gas flow of four- channel swirling burner was studied with numerical simulation by the equation of RNG-K-ε. The result showed that recirculation bubbles moved on the radiu s wh ile the velocity of swirling gas increased and on the axis while the angle of sw irling minished. At the same time, recirculation bubbles aggrandized. This paper advanced the measure of combustion of underbred coal that based on the characte ristic of the low volatile matter coal volatile matter high to catch fire, fire cinder chronic result.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2005年第5期50-52,共3页
Journal of Wuhan University of Technology
基金
国家"86 3"计划 (2 0 0 2AA335 0 5 0 ) .
关键词
四通道燃烧器
旋流风
回流区
数值模拟
four-channel swirling burner
swirling gas
r ecirculation bubbles
numerical simulation
