微颗粒涡流管惯性分离特性数值研究  

Numerical Investigation of Separation Characteristics for a Micro-Particle Vortex Tube Inertial Separator

作　　者：李明远 虞跨海[1] 芦清文 张振源 LI Ming-yuan;YU Kua-hai;LU Qing-wen;ZHANG Zhen-yuan(Department of Engineering Mechanics,Henan University of Science and Technology,Luoyang,China,471023)

机构地区：[1]河南科技大学工程力学系,河南洛阳471023

出　　处：《热能动力工程》2020年第11期87-93,共7页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(51975187,U1604135,51805150);国防基础科研项目(JCKY2018419C002);国家科技重大专项(2017-IV-0003-0040);河南省科技创新杰出青年(184100510008)。

摘　　要：提出了涡流管惯性分离结构方案,并考虑颗粒间及颗粒-壁面间的碰撞、颗粒曳力、Saffman升力和Magnus升力等,开展了40μm球形颗粒气-粒两相流计算,研究了涡流管惯性分离机理,并对比了不同排尘口结构的颗粒分离效果。研究表明:涡流管能够有效实现沙尘分离,在两种分离结构颗粒清除口截面积相等的条件下,单清除口分离效率为99.96%,流量损失为6.96%,对称双清除口分离效率为99.90%,流量损失为7.08%;单清除口结构能更快达到颗粒大量分离,减少颗粒在涡流管中的堆积,具有更好的颗粒分离能力。This paper proposes a new structure of vortex tube inertial separator,and investigates its particle separation mechanism and separation efficiency for two different dirt purge outlets,by 40μm gas-particle two-phase flow simulation,considering the factors of particle-particle collision,particle-wall collision,drag force,Saffman lift force and Magnus lift force.The result shows that the proposed vortex tube can separate the 40μm sphere particles efficiently.The separation efficiency and mass flow loss are 99.96%and 6.96%for single dirt purge structure,while 99.90%and 7.08%for symmetrical double dirt purge structure with the same total outlet section area.It illustrates that single dirt purge outlet has better separation capacity,as it can transport faster the large amount of particles and reduce the accumulation of particles in the tube.

关 键 词：涡流管 微米沙尘 分离效率 惯性分离器 数值研究 

分 类 号：V228.7[航空宇航科学与技术—飞行器设计]