|
|
|
| Influence of positive preswirl generated by different airfoils on performance of centrifugal pump |
| WANG Hai-Min, Zhou-Cai-Min, Huang-Xiong, Lin-Hao |
| (School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China) |
|
|
|
|
Abstract Two sets of inlet guide vanes with different airfoil sections were designed for the preswirl regulation in a centrifugal pump by using the basic design theory of turbomachinery to optimize its operation conditions.Subsequently, effects of positive preswirl induced by the guide vanes with different airfoils on the hydrodynamic performance of the centrifugal pump were studied. The result showed that an appropriately designed positive preswirl could increase the efficiency of the singlesuction centrifugal pump.Compared with the performance without the inlet guide vanes, the efficiency of the centrifugal pump installed the inlet guide vanes with straight constantthickness could be increased as high as 2.05% and the responding shaftpower consumption could be reduced as low as 6.35%. For the guide vanes with Gottingen364 airfoils, the efficiency of the pump was increased by 2.34% and the reduction in shaftpower consumption was lowered by 6.53%.The inlet guide vanes with both straight constantthickness blade and Gottingen airfoil showed little influence on the head. For the straight constantthickness blade, the best efficiency point was moved to a low flow rate 172 m3/h at the 20° and 40° preswirl angles; for the Gottingen airfoil, the best efficiency point was changed to 172 m3/h as well; however, the best efficiency occurred at 190 m3/h at the 40° preswirl angle.Clearly, the high efficiency range has been extended at the 20° and 40° preswirl angles for the inlet guide vanes with Gottingen airfoil.
|
|
Received: 16 April 2012
Published: 30 November 2012
|
|
|
|
| ［1］ Komarov O V, Revzin B S, Brodov Yu M. The effectiveness of using controlled power turbines in gasturbine units and regenerativecycle and simplecycle engines［J］.Thermal Engineering, 2006,53(2):154-158.［2］Hiroshi U, Akinobu K, Yuji I. Development of wide flow range compressor with variable inlet guide vane［J］.R＆D Review of Toyota CRDL, 2009, 41(3): 9-14.［3］ Kim Y T, Nam S H, Cho Y J, et al.Tubulartype hydroturbine performance for variable guide vane opening by CFD［C］／／New Trends in Fluid Mechanics Research.Beijing: Tsinghua University Press, 2007:424-427.［4］Bailie S Todd, Ng Wing F, William W Copenhaver. Experimental reduction of transonic fan forced response by IGV flow control［J］.Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines, 2006,11:161-173.［5］Jesús M F O, Katia M A D, Carlos S M, et al. Analysis of the deterministic unsteady flow in a lowspeed axial fan with inlet guide vanes［J］.Journal of Fluids Engineering,2008,130(3):031101.［6］Francesco S, Chow Y C, Oguz U, et al. The effects of inlet guide vanewake impingement on the boundary layer and the nearwake of a rotor blade［J］.Journal of Turbomachinery, 2010, 132:041016.［7］桂绍波,曹树良.离心泵前置导叶预旋调节的理论分析［J］.水泵技术, 2008(6):1-6.Gui Shaobo, Cao Shuliang. Theoretical analysis of inlet guide vane prewhirl regulation for centrifugal pump［J］.Pump Technology, 2008 (6):1-6. (in Chinese)［8］桂绍波,曹树良,谭磊,等.前置导叶预旋调节离心泵性能的数值预测与实验［J］.农业机械学报, 2009, 40(12):101-106.Gui Shaobo, Cao Shuliang, Tan Lei, et al. Numerical simulation and experiment of inlet guide vane prewhirl regulation for centrifugal pump［J］. Transactions of the Chinese Society for Agricultural Machinery,2009, 40(12): 101-106. (in Chinese)［9］Coppinger M, Swain E. Performance prediction of an industrial centrifugal compressor inlet guide vane system ［J］.Proceedings of the Institution of Mechanical Engineers, 2000,214(2):153-164.［10］陈应华.前导预旋装置调节离心泵的工况［J］.华中科技大学学报：城市科学版, 1993,10(1/2):15-20.Chen Yinghua. Regulating the discharge of centrifugal pump by the gate regulator［J］.Journal of Huazhong University of Science and Technology：Urban Science Edition, 1993, 10(1／2):15-20. (in Chinese)［11］沈阳水泵研究所.叶片泵设计手册［M］.北京:机械工业出版社, 1983:262-270. |
|
|
|
