摘要
旋流扩散燃烧广泛存在于各种燃烧装置中,低污染燃烧器研制中数值模拟已经成为一种有效的手段。发展一种合理而又经济的适用于工程实际的湍流燃烧模型是数值模拟的关键。该文用作者提出的统一二阶矩(USM)湍流燃烧模型对旋流数为0.78,环缝燃料进口的丙烷-空气旋流扩散燃烧进行了数值模拟。模拟所得到的有燃烧时的3个方向的时平均速度和脉动速度、温度以及燃料、氧和二氧化碳浓度分布,都和文献中的实验结果符合很好,从而再一次说明了统一二阶矩模型的合理性。模拟和实验结果都表明,环缝燃料进口使湍流趋于均匀和各向同性,并且强化了燃烧。
Swirling diffussion combustion exists in different kinds of combustion equipment. Numerical simulation has become an effective method to study the low pollution combustor .It is essential to develop a reasonable and economical turbulent combustion model that can be used in engineering. In this paper, the propane-air swirling diffussion combustion from an annular fuel inlet is numerically simulated by USM turbulent combustion model proposed by the authors. The simulation results of mean vdocity, fluctuation velocity, temperature, concentration of fuel, oxygen, and carbon dioxide are in agreement with the experimental results. It indicates that the USM second-order moment model is reasonable. Both simulation and experimental results show that the annular fuel inlet makes the turbulence more uniform and isotropic
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第9期45-49,共5页
Proceedings of the CSEE
基金
清华大学985项目资助.
关键词
热能动力工程
二阶矩模型
模拟
旋流燃烧
thermal power engineering： second-ordermoment model
simulation
swirling combustion.
