International Journal of Aerospace System Engineering

  • 제8권1호
  • /
  • Pages.1-13
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  • 2021
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  • 2383-4986(pISSN)
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  • 2508-7169(eISSN)
항공우주시스템공학회 (The Society for Aerospace System Engineering)
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Structure and Vibration Analyses of Low Speed Contra-Rotating Fan Stage with High Aspect Ratio

  • Sah, Supen Kumar (Department of Aerospace Engineering Indian Institute of Technology Kharagpur) ;
  • Ghosh, Anup (Department of Aerospace Engineering Indian Institute of Technology Kharagpur) ;
  • Mistry, Chetan S (Department of Aerospace Engineering Indian Institute of Technology Kharagpur)
  • 투고 : 2018.10.13
  • 심사 : 2021.05.14
  • 발행 : 2021.06.30
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초록

Contra-rotating fan is comprised of two rotors which are rotating in the opposite direction. The fan stages are named rotor-1 and rotor-2. Benefits from the use of contra rotation are in terms of better efficiency and improved thrust to weight ratio. Failure of contra-rotating fan stage blade in-service results in safety risks, repair costs, and revenue losses. This paper focuses on the vibration analysis and one way fluid-structure interaction of high aspect ratio, low speed contrarotating fan rotors. Modal analysis and modal pre-stress analysis of contra-rotating fan rotors were carried out to calculate the natural frequencies, One way fluid-structure interaction (FSI) was carried out where the computational analysis of the blades was performed using ANSYS CFX. The boundary conditions for CFD analysis were considered from the actual experimental velocity flow field at the inlet and pressure outlet. Based on the results obtained from the CFD analysis, the structural analysis such as deformation and Von-Misses stresses was carried out by using the finite element method (FEM) with ANSYS. The results provide necessary guidelines for the safe running of the contra-rotating fan. The analysis also will be helpful to understand the change of flow behavior due to a rotor deformation.

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과제정보

We thank the Department of Aerospace Engineering, Indian Institute of Technology Kharagpur for supporting us to carry out the research.

참고문헌

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