田秀山,张宏伟
TIAN Xiushan,ZHANG Hongwei

• 1:浙江浙能技术研究院有限公司

摘要(Abstract)：

为了优化旋风分离器结构和操作条件,采用数值方法分析了旋风分离器进口速度变化对其内流场特征的影响。计算模型为直段直径300 mm的旋风分离器,常温常压下进口空气速度范围为15~30 m/s,模拟结果与文献数据吻合良好。分析可知分离器压降主要由排气管口、排气管内和排尘管口等部位的高湍动能损失组成。一定轴向距离上,不同进口速度时的切向速度分布和轴向速度分布分别具有相似性特征。切向速度最大值和最小值的径向位置在r≈0.6R1和r≈0处。轴向速度两种分布形态的过渡发生在轴向距离Z≈-500 mm处。进入分离器气体的运动轨迹和停留时间与气体在进气管的进入位置和气体速度相关。基于上述研究结果,可对旋风分离器进行定性或定量的优化设计,并为分析旋风分离器多相流的流场特征和分离特征奠定了基础。
In order to optimize the structure and operating condition of cyclone separators, the effect of inlet gas velocity on the flow field characteristics in cyclone separators was investigated by numerical simulation.The diameter of the modeling cyclone is 300 mm, and the inlet gas velocity range is 15~30 m/s under normal temperature and pressure. The simulation result is in consistency with file data. The analysis shows that overall pressure drop is mainly attributed to the high turbulent flow in the gas exhaust pipe outlet, gas exhaust pipe and dust exhaust pipe. Tangential velocity and axial velocity in cyclone for different inlet velocities have similar characteristics at constant axial distance. The radial positions of the maximum and the minimum tangential velocity lie at r≈0.6 R1 and r≈0. The transition point of different distribution shape for axial velocities lies at Z≈-500 mm. The trajectory and residence time of gas is related to the inlet velocity and the inlet position. Based on the above results, the cyclone can be optimized and designed qualitatively and quantitatively,which pave the way for flow field characteristics and separation characteristics analysis on multiphase flow of cyclone separator.

关键词(KeyWords)： 旋风分离器;压降;速度分布;流线;数值模拟
cyclone separators;pressure drop;velocity distribution;flow line;numerical simulation

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 田秀山,张宏伟
TIAN Xiushan,ZHANG Hongwei

DOI: 10.19585/j.zjdl.201711004

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