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**The comparison of incomplete sensitivities and genetic algorithms applications in 3D radial turbomachinery blade optimization.**
*(English)*
Zbl 1245.76135

Summary: In the present work, a centrifugal pump impeller’s blades shape was redesigned to reach a higher efficiency in turbine mode using two different optimization algorithms: one is a local method as incomplete sensitivities-gradient based optimization algorithm coupled by 3D Navier-Stokes flow solver, and another is a global method as Genetic algorithms and artificial neural network coupled by 3D Navier-Stokes flow solver. New impeller was manufactured and tested in the test rig. Comparison of the local optimization method results with the global optimization method results showed that the gradient based method has detected the global optimum point. Experimental results confirmed the numerical efficiency improvement in all measured points. This study illustrated that the developed gradient based optimization method is efficient for 3D radial turbomachinery blade optimization.

### MSC:

76N25 | Flow control and optimization for compressible fluids and gas dynamics |

76U05 | General theory of rotating fluids |

76M25 | Other numerical methods (fluid mechanics) (MSC2010) |

92D99 | Genetics and population dynamics |

### Keywords:

efficiency improvement; genetic algorithms; incomplete sensitivities; neural network; reverse pump
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\textit{S. Derakhshan} et al., Comput. Fluids 39, No. 10, 2022--2029 (2010; Zbl 1245.76135)

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