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<p>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.</p>

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

  • 期刊论文

  • 发表日期：

    2025年8月23日

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  • Xin Li,
  • Tongtong Meng,
  • Lucheng Ji

摘要

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.