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Impact of blade number on performance, loss and flow characteristics of one mixed flow turbine

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  • Ketata, Ahmed
  • Driss, Zied
  • Abid, Mohamed Salah

Abstract

Mixed flow turbines have been widely applied in turbochargers, aircraft engines and power generation systems. It is well known that the mixed flow turbine is a seat of several losses such as secondary flow generation and incidence effects. The turbine loss is dependent on its design parameters, especially the blade number. Commonly, this last parameter is determined by old empirical correlations which are less accurate than more advanced computation methods. In the light of this, the present paper investigates the effect of the blade number using the latest advanced 3D-CFD code attempting to improve performance and further reduce loss generation. Seven designs of the mixed turbine with different numbers of blades from 3 up to 15 have been considered for investigation. Computed results have been validated against experimental data collected from a developed test rig. Two correlations have been developed relating the mass flow parameter and the output torque of the turbine to its blade number. Also, a detailed analysis on the effect of the blade number on the tip clearance flow leakage has been performed. Results showed better efficiency and a decreased blade passage loss with an increasing blade number.

Suggested Citation

  • Ketata, Ahmed & Driss, Zied & Abid, Mohamed Salah, 2020. "Impact of blade number on performance, loss and flow characteristics of one mixed flow turbine," Energy, Elsevier, vol. 203(C).
    • Handle: RePEc:eee:energy:v:203:y:2020:i:c:s0360544220310215
    DOI: 10.1016/j.energy.2020.117914
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    References listed on IDEAS

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    1. Xue, Yingxian & Yang, Mingyang & Martinez-Botas, Ricardo F. & Romagnoli, Alessandro & Deng, Kangyao, 2019. "Loss analysis of a mix-flow turbine with nozzled twin-entry volute at different admissions," Energy, Elsevier, vol. 166(C), pages 775-788.
    2. Liu, Shuo & Cui, Yi & Wang, Yi & Deng, Kangyao & Liu, Sheng, 2019. "An evaluation method for transient response performance of turbocharged diesel engines," Energy, Elsevier, vol. 182(C), pages 852-863.
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    Citations

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    Cited by:

    1. Ohiemi, Israel Enema & Sunsheng, Yang & Singh, Punit & Li, Yanjun & Osman, Fareed, 2023. "Evaluation of energy loss in a low-head axial flow turbine under different blade numbers using entropy production method," Energy, Elsevier, vol. 274(C).
    2. Fershalov, A. Yu & Fershalov, Yu. Ya & Fershalov, M. Yu, 2021. "Principles of designing gas microturbine stages," Energy, Elsevier, vol. 218(C).
    3. Ketata, Ahmed & Driss, Zied, 2021. "Characterization of double-entry turbine coupled with gasoline engine under in- and out-phase admission," Energy, Elsevier, vol. 236(C).
    4. Xue, Yingxian & Yang, Mingyang & Pan, Lei & Deng, Kangyao & Wu, Xintao & Wang, Cuicui, 2021. "Gasdynamic behaviours of a radial turbine with pulsating incoming flow," Energy, Elsevier, vol. 218(C).
    5. Mohd Jazmi Asyraff Jama’a & Balamurugan Annamalai Gurunathan & Ricardo Martinez Botas & Uswah Khairuddin, 2023. "Comparison of Secondary Flow Characteristics in Mixed-Flow Turbine between Nozzleless and Symmetric Nozzle Vane Angles under Steady-State Flow at Full Admission," Energies, MDPI, vol. 16(10), pages 1-29, May.

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