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Aerodynamic design and optimization of a multi-stage axial flow turbine using a one-dimensional method

  • Xinyang Yin (School of Energy and Power, Dalian University of Technology) ;
  • Hanqiong Wang (School of Energy and Power, Dalian University of Technology) ;
  • Jinguang Yang (School of Energy and Power, Dalian University of Technology) ;
  • Yan Liu (School of Energy and Power, Dalian University of Technology) ;
  • Yang Zhao (Shenyang Blower Works Group Corporation) ;
  • Jinhu Yang (Qingdao Institute of Aeronautical Technology)
  • Received : 2023.03.06
  • Accepted : 2023.06.05
  • Published : 2023.05.25
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Abstract

In order to improve aerodynamic performance of multi-stage axial flow turbines used in aircraft engines, a one-dimensional aerodynamic design and optimization framework is constructed. In the method, flow path is generated by solving mass continuation and energy conservation with loss computed by the Craig & Cox model; Also real gas properties has been taken into consideration. To obtain an optimal result, a multi-objective genetic algorithm is used to optimize the efficiencies and determine values of various design variables; Final design can be selected from obtained Pareto optimal solution sets. A three-stage axial turbine is used to verify the effectiveness of the developed optimization framework, and designs are checked by three-dimensional CFD simulation. Results show that the aerodynamic performance of the optimized turbine has been significantly improved at design point, with the total-to-total efficiency increased by 1.17% and the total-to-static efficiency increased by 1.48%. As for the off-design performance, the optimized one is improved at all working points except those at small mass flow.

Keywords

Acknowledgement

The 1st author owes thanks to Mr. Li Zhi for his help on using the blade design program, and the 6th author would like to acknowledge the support by the Taishan Scholars Program.

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