Numerical Research of Blended-Blade and Endwall Technique on Rotor 67

  • LI Xin ,
  • MENG Tongtong ,
  • JI Lucheng
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  • Institute for Aero Engine, Tsinghua University, Beijing 100084, China

Online published: 2025-09-01

Supported by

This work reported is supported by the National Science and Technology Major Project of China (Grant No. J2019-II-0003-0023).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

Abstract

In this study, a full smoothed Blended Blade and End Wall (BBEW) design method for axial fan blade is proposed, overcoming the limitations of traditional BBEW design methods which can only control dihedral angles in planar cascade using straight-line adjustments. Then the effect and mechanism of BBEW technique on Rotor 67 have been studied using a design of experiments (DoE) population. Key parameters that affect the effect of BBEW techniques, including the maximum blended position and the maximum blended scale, are extracted through DoE population. The results show that nearly all blended designs in suction side realize the aerodynamic improvement of overall performance at different rotation speeds. Specifically, the peak efficiency is improved by 0.46% at design condition. From the perspective of flow details, through the radial migration of low-energy flow from corner region to mainstream by radial blade force, the area of corner separation is significantly decreased and its topology is simplified.

Cite this article

LI Xin , MENG Tongtong , JI Lucheng . Numerical Research of Blended-Blade and Endwall Technique on Rotor 67[J]. Journal of Thermal Science, 2025 , 34(5) : 1829 -1840 . DOI: 10.1007/s11630-025-2152-z

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