叶片式径向扩压器负荷分布影响
Effects of loading distribution on a vaned diffuser
-
摘要: 以某典型负荷离心压气机径向扩压器为例,采用数值模拟的方法,在级环境下分析了径向扩压器前加载、后加载以及叶根前加载叶尖后加载三种负荷分布对离心压气机总体性能的影响;并通过对比分析扩压器内二次流等参数,讨论了负荷分布影响的内在机制.对比计算结果表明,叶根前加载叶尖后加载的负荷分布形式能够降低扩压器的流动损失,对离心压气机的总性能更为有利.Abstract: The effects of loading distribution on a vaned diffuser of a highly loaded centrifugal compressor were numerically investigated by NUMECA.Three kinds of loading distributions, i.e. :forward loading,backward loading and hub/tip loading,were discussed.Their effects on the vaned diffuser and the flow mechanism were analyzed.It is demonstrated that the vaned diffuser with hub/tip loading could achieve the best performance.
-
Key words:
- loading distribution /
- secondary flow /
- numerical simulation /
-
[1] Palmer D L,Waterman W F.Design and development of an advanced two-stage centrifugal compressor [J].Journal of Turbomachinery,Transactions of the ASME,1995,117(2):205-212. [2] Moore J,Moore J G.Three dimensional viscous calculations for assessing the thermodynamic performance of centrifugal compressors—Study of the Eckardt compressor .AGARD CP 282,1980. [3] Jansen M,Rautenery M,Bammert K.On the influence of the diffuser inlet shape on the performance of a centrifugal compressor stage //Proceedings of ASME Turbo. Expo.,Phoenic,A Z:ASME,1983. [4] Pampreen R C.The use of cascade technology in centrifugal compressor vaned diffuser design[J].ASME Journal of Engineering for Power,1972,94(3):187-192. [5] 高星.斜流-离心双级压气机内部复杂流动与设计方法研究 .北京:北京航空航天大学,2008. GAO Xing.The complex flow mechanism and design method of mixedflow-centrifugal two-stage compressor .Beijing:Beijing University of Aeronautics and Astronautics,2008.(in Chinese) [6] Ybshinaga Y,Kaneki T,Kobayashi,et al.A study of performance improvement for high specific speed centrifugal compressors by using diffusers with half guide vanes [J].ASME Journalof F1uids Engineering,1987,109(4):359-367. [7] Casartelli E,Saxer A P,Gyarmathy G.Numerical flow analysis in a subsonic vaned radial diffuser with leading edge redesign [J].ASME Journal of Turbomachinery,1999,21(1):119-126. [8] Ohta Y,Goto T,Outa E.Effects of tapered diffuser vane on the flow field and noise of a centrifugal compressor [J].Journal of Thermal Science,2007,16(4):301-308. [9] Cumpsty N A.Compressor aerodynamics [M].England:Longman Scientific and Technical,1990. [10] Peeters M,Sleiman M.A numerical investigation of the unsteady flow in centrifugal stages .ASME 2000-GT-426,2000. [11] 石建成,高星,刘宝杰.跨声速离心叶轮负荷分布的影响分析[J].推进技术,2008,29(4):458-464. SHI Jiancheng,GAO Xing,LIU Baojie.Effects of loading distribution on a transonic centrifugal compressor [J].Journal of Propulsion Technology,2008,29(4):458-464.(in Chinese) [12] Denton J D,Xu L.The exploitation of three dimensional flow in turbomachinery design [J].Journal of Mechanical Engineering Science,1999,213(2):125-137.
点击查看大图
计量
- 文章访问数: 1515
- HTML浏览量: 1
- PDF量: 13
- 被引次数: 0