进气支板周向位置对动叶激励和振动的影响  

Influence of circumferential position of intake struts on rotor bladeexcitation and vibration

作　　者：彭威[1] 任晓栋 李雪松[1] 顾春伟[1] 吴宏 PENG Wei;REN Xiaodong;LI Xuesong;GU Chunwei;WU Hong(Gas Turbine Research Institute,Tsinghua University,Beijing 100084,China;China United Heavy Duty Gas Turbine Technology Company Limited,Beijing 102209,China)

机构地区：[1]清华大学燃气轮机研究所,北京100084 [2]中国联合重型燃气轮机技术有限公司,北京102209

出　　处：《航空动力学报》2024年第5期273-283,共11页Journal of Aerospace Power

基　　金：国家科技重大专项(J2019-Ⅱ-0005-0025)。

摘　　要：为探究进气支板与下游叶片相对周向位置对压气机动叶所受激励和振动的影响规律和机理,模拟了一个带进气支板的重型燃气轮机压气机前1.5级。通过对动叶片的流场和振动的分析发现:进气支板周向位置对总压比和总温比影响很小,但会明显改变动叶受到的激励和振动水平。当进气支板尾迹与导叶尾迹重合时,两种尾迹叠加加强,导致动叶的激励和振动整体增强。支板位置会明显改变支板尾迹和下游静叶势流对动叶的叠加影响,这对弦长中部非定常载荷和整体振动的影响较明显,对前尾缘附近影响很小。研究结果为支板的安装提供了参考和指导。In order to investigate the influence law and mechanism of the relative circumferential position of the intake struts and downstream blades on the excitation and vibration of the rotor blade,the first 1.5 stage of a heavy-duty gas turbine compressor with intake struts was numerically simulated.Through analysis of the flow field and vibration of the rotor blade,it was found that the circumferential position of the intake struts had little effect on the total pressure ratio and total temperature ratio,but it could obviously change the excitation and vibration level of the rotor blade.When intake strut wakes and guide vane wakes coincided,the two wakes were superimposed and strengthened,resulting in the overall enhancement of excitation and vibration on the rotor blade.The circumferential position of struts obviously changed the combined effect of strut wake and downstream static blade potential flow on rotor blades,which had obvious influence on the unsteady load and global vibration in the middle chord length,but had little influence on the unsteady load near the leading edge and trailing edge.The research results can provide a reference and guidance for the installation of struts.

关 键 词：进气支板 激励 振动 转静干涉 压气机 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]