Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Design of a Propeller Type Rim-Driven Axial-Flow Turbine for a Micro-Hydropower System

마이크로 수력 발전을 위한 프로펠러형 림구동 축류 터빈 설계

  • Received : 2022.03.14
  • Accepted : 2022.05.11
  • Published : 2022.06.20
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Abstract

A design method for a propeller type rim-driven axial-flow turbine for a micro-hydropower system is presented. The turbine consists of pre-stator, impeller and post-stator, where the pre-stator plays a role as a guide vane to provide circumferential velocity to the on-coming flow, and the impeller as a rotational power generator by absorbing angular momentum of the flow. BEM(Blade Element Method), which is based on the turbine Euler equation, is employed to design the pre-stator and impeller blades. NACA 66 thickness form and a=0.8 mean camber line, which is widely accepted as a marine propeller blade section, is used for the pre-stator and turbine blade section. A CFD method, derived from the discretization of the RANS equations, is applied for the analysis of the designed turbine system. The design conditions of the turbine is confirmed by the CFD calculation. Turbine characteristic curve is calculated by the CFD method, in order to provide the performance characteristics at off-design operation conditions. The proposed procedures for the design of a propeller type rim-driven axial-flow turbine are established and confirmed by the CFD analysis.

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References

  1. ANDRITZ, Small and Mini Hydropower Solutions, [Online] https://www.andritz.com/resource/blob/33446/d2118386d6a8dbbec556c6e159391c64/hy-small-and-mini-hydropower-solutions-en-data.pdf, [Accessed 10 March 2022].
  2. Brockett, T., 1966. Minimum pressure envelopes for modified NACA-66 sections with NACA a=0.8 camber and Buships type I and type II sections, DTRC Report 1780.
  3. Cai, M., Yang, C., Wu, S., Zhu, Y., and Xie, Y., 2015. Hydrodynamic analysis of a rim-driven thruster based on RANS method, Ocean 2015 - MTS/IEEE, Washington, DC, USA, 19-22 October 2015.
  4. Jung, S.M., Park, J.H., Choi, J.Y., Ha, S.J. and Kwon, O.J., 2019. Numerical study on hydrodynamic characteristics of a rim driven integrated thruster. Journal of Computational fluids engineering, 24, pp.40-47. https://doi.org/10.6112/kscfe.2019.24.1.040
  5. Kim, D.Y. and Kim, Y.T., 2019. Fundamental design of a 75kW Rim driven propeller. Journal of the korea society marine engineering, 43(1), pp.31-39.
  6. Lee, C.M. and Kim, J.G., 2021. Establishment of micro hydropower power generation facilities in mountain areas, The Transactions of the Korean Institute of Electrical Engineers, 70(11), pp.1685-1690. https://doi.org/10.5370/KIEE.2021.70.11.1685
  7. Sayers, A.T., 1990. Hydraulic and compressible flow turbomachines, McGraw-Hill Book Co Ltd.
  8. Simerics Inc. White Paper 2014, Automated meshing with binary tree, https://www.simerics.com/wp-content/uploads/2014/04/Automated-Meshing-with-Binary-Tree_reg.pdf, [Accessed 14 March 2022].
  9. US Department of Energy. Microhydropower Systems [Online] https://www.energy.gov/energysaver/microhydropower-systems, [Accessed 10 March 2022].
  10. Yan, X., Liang X., Ouyang W., Liu Z., Liu B., and Lan J., 2017. A review of progress and applications of ship shaft-less rim-driven thrusters. Ocean Engineering, 144.