燃气轮机对进气质量的要求很高，低质量的空气进入燃气轮机不仅不能保证其正常的工作条件，还极易给燃气轮机带来不可恢复的损害，因此研制高效的燃气轮机进气滤清器成为一项十分重要的任务。为了研究轴流式旋风分离器在不同工作条件下的分离性能，通过数值模拟的方法，对多管式轴流旋风分离器的其中一个分离管进行研究，分析进气角度和集尘管进口扫气压力对不同直径颗粒的分离性能的影响，并探索灰尘颗粒在分离器中运动过程的物理机理。研究结果表明，适当的预旋角度会提高小直径颗粒的分离效率，而较大直径颗粒的分离效率反而有所降低;降低集尘管进口扫气压力会提高小直径颗粒的分离效率，对大直径颗粒的分离效果几乎没有影响。计算结果可为轴流旋风分离器的设计和工程应用提供理论指导。

Gas turbine is very sensitive to the quality of intake air,and low quality of intake air may not only lead to unnormal operating conditions,but also cause irreversible damage. Therefore the development of high-efficiency filter for gas turbine becomes an important task. In order to study the separation performance of an axial cyclone separator under different working conditions,by using numerical simulation method,a multitubular axial cyclone separator is studied. The influence on separation efficiency of different inlet angles and different pressures of dust collecting tube inlet is analyzed,and physical principle of particle’s moving in the separator is explored. Research results show that an appropriate inlet angle can improve separation efficiency of small diameter particles,but it also can depress separation efficiency of larger diameter particles; reducing pressure of inlet of dust collecting tube can improve separation efficiency of small diameter particles,but it has little effect on larger diameter particles. Computing results can provide theoretical reference for design and application of axial cyclone separator in engineering.