微颗粒摄入对燃气涡轮关键部件产生侵蚀、沉积等问题，严重危害其可靠性与安全性。提出了一种阵列涡流管分离装置，建立了气-粒两相流耦合计算模型，考虑颗粒碰撞和流体相对颗粒作用力，通过分析涡流管内部流动特性、颗粒运动轨迹等，研究了涡流管分离器分离机理，并对比了两种排尘结构对颗粒分离效率的影响。结果表明：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。

Ingestion of micronsized particles leads to erosion and deposition on the components of gas turbine,and may significantly compromise reliability and safety.An array vortex tube separation device is proposed in this paper.Considering particle collision and fluid relative particle force,a coupling calculation model of gasparticle twophase flow is established.The separation mechanism of the vortex tube separator is studied and the effects of two types of dust extraction structures on particle separation efficiency are compared by analyzing the flow characteristics and particle trajectories in the vortex tube.The result shows that the proposed vortex tube can separate the 40 μm 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 achieve a large amount of particles seperation faster,and have less accumulation of particles in the vortex tube.

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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）