|
|
|
| Precise calculation for points along meridional streamline of centrifugal pumps |
| Yan Jing,Wang Tao,Li Weicheng,Kan Nengqi |
| (School of Energy and Environment,Xihua University,Chengdu,Sichuan 610039,China) |
|
|
|
|
Abstract In order to improve the precision in blade drawing of centrifugal pump impellers and to shorten drawing period involved in conformal transformation methods,the calculation principles and methods are studied to determine the locations of dividing points along streamline when the front shroud streamline on meridional plane comprises two arcs tangential to each other.Based on mathematical analysis,3 possible locations of the first point on the lower arc which is a part of the front meridional streamline were described,and 3 tranncendental equations suitable to each case were derived.The solutions to these equations will determine the accurate locations of first point on lower arc and improve the shape of blade contours.The principles and methods presented here will alter the traditional manual way in blade drawing process and the resulting poor continuity and smoothness of blade contours.
|
|
Received: 13 April 2009
Published: 30 May 2009
|
|
|
|
| [1]严敬.低比转速离心泵原理、参数优化及绘型[M].成都:四川科学技术出版社,1998:180-189.[2]Lobanoff V S,Ross R R.Centrifugal Pumps:Design and Application[M].Houston,Texas:Gulf Publishing Company,1992:36-40.[3]严敬,牛妮,李维承,等.保角变换离心式叶片绘型的新方法[J].兰州理工大学学报,2008,34(4):58-60.Yan Jing,Niu Ni,Li Weicheng,et al.A new way to plot centrifugal blades with conformal transformation[J].Journal of Lanzhou University of Technology,2008,34(4):58-60.(in Chinese)[4]严敬.轴面流线分点计算[J].四川工业学院学报,1999,18(1):33-36.Yan Jing.Determination of points along meridian stream lines[J].Journal of Sichuan University of Science and Technology,1999,18(1):33-36.(in Chinese)[5]关醒凡.现代泵技术手册[M].北京:宇航出版社,1995:216-218.[6]王福军,黎耀军,王文娥,等.水泵CDF应用中的若干问题与思考[J].排灌机械,2005,23(5):1-10.Wang Fujing,Li Yaojun,Wang Wen′e,et al.Analysis on CFD application in water pumps[J].Drainage and Irrigation Machinery,2005,23(5):1-10.(in Chinese)[7]康灿,杨敏官,罗惕乾,等.高压静电喷洒机的试验[J].江苏大学学报:自然科学版,2007,28(3):197-200.Kang Can,Yang Minguan,Luo Tiqian,et al.Experiment of high voltage electrostatic spray machine[J].Journal of Jiangsu University:Natural Science Edition,2007,28(3):197-200.(in Chinese)[8]Dai Huihui,Li Jibing.On the Study of Singular Nonlinear Traveling Wave Equations:Dynamical System Approach[M].北京:中国科学出版社,2008:27-32.[9]Sheng Junfan.Moment inequality and holder inequality for BSDEs[J].Acta Mathematicae Applicatae Sinica,2009(1):11-20. |
|
|
|
