The blade trailing edge profile is of crucial importance for the performance and pressure pulsations of centrifugal pumps. In the present study, numerical investigation is conducted to analyze the effect of the blade trailing edge profile influencing the performance and unsteady pressure pulsations in a low specific speed centrifugal pump. Five typical blade trailing edges are analyzed including original trailing edge (OTE), circle edge (CE), ellipse on pressure side (EPS), ellipse on suction side (ESS), and ellipse on both sides (EBS). Results show that the well-designed blade trailing edges, especially for the EPS and EBS profiles, can significantly improve the pump efficiency. Pressure amplitudes at fBPF and 2fBPF are together calculated to evaluate the influence of the blade trailing edge profile on pressure pulsations. The EPS and EBS profiles contribute obviously to pressure pulsations reduction. In contrast, the CE and ESS profiles lead to increase of pressure pulsation amplitude compared with the OTE pump. Vorticity distribution at the blade trailing edge demonstrates that the EPS and EBS profiles have an effective impact on reducing vortex intensity at the blade trailing edge. Consequently, rotor–stator interaction could be attenuated leading to lower pressure pulsation amplitude. It is thought to be the main reason of pressure pulsations reduction obtained with the proper modified blade trailing edges. The results would pave the way for further optimization of the blade trailing edge profile.
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Influence of the Blade Trailing Edge Profile on the Performance and Unsteady Pressure Pulsations in a Low Specific Speed Centrifugal Pump
Bo Gao,
Bo Gao
School of Energy and Power Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: gaobo@ujs.edu.cn
Jiangsu University,
Zhenjiang 212013, China
e-mail: gaobo@ujs.edu.cn
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Ning Zhang,
Ning Zhang
School of Energy and Power Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: zhangningwlg@163.com
Jiangsu University,
Zhenjiang 212013, China
e-mail: zhangningwlg@163.com
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Zhong Li,
Zhong Li
School of Energy and Power Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: lizhong@ujs.edu.cn
Jiangsu University,
Zhenjiang 212013, China
e-mail: lizhong@ujs.edu.cn
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Dan Ni,
Dan Ni
School of Energy and Power Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: nxm0424@163.com
Jiangsu University,
Zhenjiang 212013, China
e-mail: nxm0424@163.com
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MinGuan Yang
MinGuan Yang
School of Energy and Power Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: mgyang@ujs.edu.cn
Jiangsu University,
Zhenjiang 212013, China
e-mail: mgyang@ujs.edu.cn
Search for other works by this author on:
Bo Gao
School of Energy and Power Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: gaobo@ujs.edu.cn
Jiangsu University,
Zhenjiang 212013, China
e-mail: gaobo@ujs.edu.cn
Ning Zhang
School of Energy and Power Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: zhangningwlg@163.com
Jiangsu University,
Zhenjiang 212013, China
e-mail: zhangningwlg@163.com
Zhong Li
School of Energy and Power Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: lizhong@ujs.edu.cn
Jiangsu University,
Zhenjiang 212013, China
e-mail: lizhong@ujs.edu.cn
Dan Ni
School of Energy and Power Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: nxm0424@163.com
Jiangsu University,
Zhenjiang 212013, China
e-mail: nxm0424@163.com
MinGuan Yang
School of Energy and Power Engineering,
Jiangsu University,
Zhenjiang 212013, China
e-mail: mgyang@ujs.edu.cn
Jiangsu University,
Zhenjiang 212013, China
e-mail: mgyang@ujs.edu.cn
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received May 18, 2015; final manuscript received October 21, 2015; published online January 6, 2016. Assoc. Editor: Frank C. Visser.
J. Fluids Eng. May 2016, 138(5): 051106 (10 pages)
Published Online: January 6, 2016
Article history
Received:
May 18, 2015
Revised:
October 21, 2015
Citation
Gao, B., Zhang, N., Li, Z., Ni, D., and Yang, M. (January 6, 2016). "Influence of the Blade Trailing Edge Profile on the Performance and Unsteady Pressure Pulsations in a Low Specific Speed Centrifugal Pump." ASME. J. Fluids Eng. May 2016; 138(5): 051106. https://doi.org/10.1115/1.4031911
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