摘要
(武汉理工大学硅酸盐材料工程教育部重点实验室,湖北武汉430070)摘要:采用重整化群双方程模型对喷旋结合型分解炉内湍流流动进行了数值模拟,与现场结果相比较分析了炉内气体的运动和湍流特性的规律和特点。研究表明:由于分解炉的下部缩口区域的存在,气流经过此区域时流动面积突增,成喷射状。在带有旋流三次风与窑尾烟气共同作用下,在三次风进口相对的一侧出现高速区(其最高速度达到35.34m/s),同时在分解炉三次风进口一侧的下锥体上部和柱体附近沿壁面处出现负的速度分布,形成环状涡流区。
The turbulence flow in the spiraled and sprayed calciner was simulated using Renormalization group Model （RNG） and SIMPLE method, and the properties of flow and turbulence characteristics in the calciner was analyzed compared to the in-situ results. The simulation results demonstrate that the simulation results agree with those of the engineering. Due to the reduced part of the bottom of calciners, flow area of airflow was increased abruptly, which formed sprayed effect. With the mix of the tertiary air with swirl flow and secondary air, the high-speed zone was formed in the opposite side of inlet of tertiary air, and the zone near the side of inlet of tertiary air formed the back-flow zone, in which the velocity was negative. Moreover, inlet of raw meal designed in the high-speed zone can be propitious to the decentralization of raw meal.
出处
《水泥工程》
CAS
2005年第4期21-23,共3页
Cement Engineering
基金
国家"863"计划项目资助(2002AA335050)
关键词
喷旋分解炉
流动
RNGκ-ε模型
数值模拟
spiralled and sprayed calciner
flow
RNGκ-ε model
numerical simulation
