基于局部射流提升粒子分离器分砂性能的方法  

Method of improving sand separation performance of particle separator based on local jet

作　　者：程飞 孙姝[2] 谢买祥 张悦[1] 谭慧俊[1] CHENG Fei;SUN Shu;XIE Maixiang;ZHANG Yue;TAN Huijun(College of Energy and Power,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Civil Aviation/Flight Academy,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Hunan Aviation Powerplant Research Institute,Aero Engine Corporation of China,Zhuzhou Hunan 412002,China)

机构地区：[1]南京航空航天大学能源与动力学院,南京210016 [2]南京航空航天大学民航/飞行学院,南京210016 [3]中国航发湖南动力机械研究所,湖南株洲412002

出　　处：《航空动力学报》2023年第6期1414-1422,共9页Journal of Aerospace Power

基　　金：国家自然科学基金(51806102,51906104,12025202,U20A2070,11772156);国家科技重大专项(J2019-Ⅱ-0014-0035)。

摘　　要：针对整体式惯性粒子分离器对小粒径砂尘分离效率低下的问题,提出了一种通过引入局部射流形成气动鼓包,以提升粒子分离器对小粒径砂尘分离效率的方法,并通过仿真验证了该方法的有效性。研究发现:气动鼓包的形成对小粒径砂尘的分离效率提升明显,在出口总压恢复下降不超过0.5%的前提下能将AC砂的分离效率提高3.6%,最高可提升7%;引入射流能有效提升粒径在9μm及以下砂尘的分离效率,并且,砂尘粒径越小,其提升效果也越低,对于9μm粒径砂尘,可将其分离效率提升至100%;射流引入位置应设置在中心体鼓包壁面上,且在一定范围内,射流角度与来流夹角越大、射流压强越大,对小粒径砂尘分离效率的提升效果也就越高。In view of the problem that the inertial particle separator has low separation efficiency of sands with small diameter sand,a method was proposed to improve the small diameter sand separation efficiency by introducing local jet to form pneumatic bulge,and the effectiveness of the method was verified by simulation.Results showed that,the formation of pneumatic bulge can significantly improve the small diameter sand separation efficiency,and the separation efficiency of AC sands can be increased by 3.6%,or up to 7%,under the premise that the total pressure recovery at the outlet was no more than 0.5%;the introduction of jet can effectively improve the separation efficiency of sands with diameter of 9μm and below,and the smaller diameter indicated the lower lifting effect.For sands with diameter of 9μm,the separation efficiency can be increased to 100%;the injection position of the jet should be set on the wall surface of the centrosome bulge,and within a certain range,the greater angle between the jet and incoming flow and the greater jet pressure indicated the higher improvement effect on the small diameter sand separation efficiency.

关 键 词：分离效率 粒子分离器 气动鼓包 气固两相流 小粒径砂尘 

分 类 号：V211.48[航空宇航科学与技术—航空宇航推进理论与工程]