Parametric research on improved Qiu slip factor modelfor centrifugal compressor impellers
-
摘要: 为适用于微型离心压气机叶轮的通流设计,对Qiu滑移因子模型加入了3个经验参数.首先对经验参数的求解方法及参数对于设计精度的影响进行了分析研究,发现其中经验参数cr对于设计精度影响较大.其次在通流设计中应用改进的Qiu滑移因子模型辅助生成叶片,用计算流体动力学(CFD)研究了cr所影响的模型滑移因子,与数值流场的出口平均滑移因子对比,得到了多种叶轮总体参数下cr的最佳取值.发现虽然微型、大型离心压气机叶轮总体参数变化范围很大,但cr的取值均以0.7左右为其最佳值.Abstract: To adapt the slip factor model proposed by Qiu to the through-flow design of micro-centrifugal impellers, three empirical parameters were introduced to reduce the system error. Firstly, the solving method of these empirical parameters and the impact on the design accuracy were researched. It is seen that empirical parameter cr influences the design accuracy greatly. Secondly, with employment of the improved Qiu slip factor model, a micro-centrifugal impeller was designed. The predicted slip factors impacted by cr in the model were compared with the impeller-outlet-averaged slip factors resulted from the CFD flow field simulation. The most suitable values of cr were found at different prescribed design overall parameters. It is found that cr nearby 0.7 has a best estimation, though the overall parameters of micro- or large-centrifugal compressor impeller vary widely.
-
[1] 舒士甄,朱力,柯玄龄,等.叶轮机械原理[M].北京:清华大学出版社,1991. [2] Stodola A.Steam andgas turbines[M].New York:McGraw-Hill,1927. [3] 陈宗华,张亚丁.半开式叶轮离心式压缩机的设计与分析[J].化工设备与防腐蚀,2000(3):3-8. [4] Wiesner F J.A review of slip factors for centrifugal impellers[J].Journal of Engineering for Power,1967,89(4):558-572. [5] Eck B.Fans:design and operation of centrifugal,axialflow,and cross-flow fans[M].Frankfurt,Germany:Pergamon Press,1973. [6] Del Greco A S,Biagi F R,Sassanelli G,et al.A new slip factor correlation for centrifugal impellers in a wide range of flow coefficients and peripheral Mach numbers .ASME Paper GT-2007-27199,2007. [7] Qiu X,Mallikarachchi C,Anderson M.A new slip factor model for axial and radial impellers .ASME Paper GT-2007-27064,2007. [8] 田晓沛,单鹏.Qiu滑移模型在小型离心叶轮通流设计中的改进[J].航空动力学报,2010,25(11):2539-2547. TIAN Xiaopei,SHAN Peng.Improvements of Qiu slip factor model applied for quasi-3D through-flow design of small centrifugal impellers[J].Journal of Aerospace Power,2010,25(11):2539-2547.(in Chinese) [9] Qiu X.Analysis and validation of a unified slip factor model for impellers at design and off-design conditions[J]. Journal of Turbomachinery,2011,133(4):041018.1-041018.9. [10] 马平,田晓沛,单鹏.离心压气机通流反问题的损失模型研究[J].航空动力学报,2009,24(4):858-866. MA Ping,TIAN Xiaopei,SHAN peng.Loss model application study in the through-flow inverse design approach for centrifugal compressors[J].Journal of Aerospace Power,2009,24(4):858-866.(in Chinese) [11] Tang J,Teemu T S,Reunanen A,et al.Numerical investigation of the effect of tip clearance to the performance of a small centrifugal compressor .ASME Paper GT-2006-90893,2006. [12] NUMECA International.FINETM user manual version 6.2-b [M].Brussels,Belgium:NUMECA International,2004. [13] TIAN Xiaopei,SHAN Peng.A compressible 3-dimensional inverse method based on the streamline curvature approach and Clebsch formulation for radial and mixed flow turbomachines .Anahieim,US:ASME 2012 Power Conference,2012. [14] 孟斐.离心压气机一维气动程序改进和通道构形设计 .北京:北京航空航天大学,2011. MENG Fei.Improvement of the one-dimensional centrifugal compressor aerodynamic design program and design on passage configuration .Beijing:Beijing University of Aeronautics and Astronautics,2011.(in Chinese) [15] Krain H,Hoffmann W.Centrifugal impeller geometry and its influence on secondary flows .Advisory Group for Aerspace Research and Development,CP 469,1990.
点击查看大图
计量
- 文章访问数: 1722
- HTML浏览量: 1
- PDF量: 859
- 被引次数: 0