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<p>For a fan system, the use of splitter could improve efficiency and acoustic performance by decreasing turbulent kinetic energy due to increased number of blades without increasing the inlet loss. In this study, a shape optimization and splitter designs were conducted numerically, and method was validated with previous experimental data. For noise performance, the volume integral value of the turbulent viscosity was used based on previous studies. Two-step design approach, composed of the main blade-shape optimization and the splitter design, was adopted. The splitters were designed with 0.6 times scaled shape of main blade in middle location between main blades. Because the fan with splitters showed enhanced performance, the rotational speed and fan size could be reduced to decrease shaft power. An efficient design methodology for the fan with splitter was proposed, and the optimized results showed improved efficiency by 12.5 % and decreased noise level by 1.6 dB.</p>

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Optimization of a centrifugal fan with splitters considering aerodynamics and aeroacoustics performances

  • 期刊论文

  • 发表日期：

    2025年5月30日

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  • Jeong Tae Kim,
  • Jae Sung Yang,
  • Seongho Park,
  • June Kee Min

摘要

For a fan system, the use of splitter could improve efficiency and acoustic performance by decreasing turbulent kinetic energy due to increased number of blades without increasing the inlet loss. In this study, a shape optimization and splitter designs were conducted numerically, and method was validated with previous experimental data. For noise performance, the volume integral value of the turbulent viscosity was used based on previous studies. Two-step design approach, composed of the main blade-shape optimization and the splitter design, was adopted. The splitters were designed with 0.6 times scaled shape of main blade in middle location between main blades. Because the fan with splitters showed enhanced performance, the rotational speed and fan size could be reduced to decrease shaft power. An efficient design methodology for the fan with splitter was proposed, and the optimized results showed improved efficiency by 12.5 % and decreased noise level by 1.6 dB.