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논문 기본 정보

자료유형
학술저널
저자정보
Supen Kumar Sah (Indian Institute of Technology Kharagpur) Anup Ghosh (Indian Institute of Technology Kharagpur) Chetan S Mistry (Indian Institute of Technology Kharagpur)
저널정보
항공우주시스템공학회 International Journal of Aerospace System Engineering International Journal of Aerospace System Engineering Vol.8, No.1
발행연도
2021.6
수록면
1 - 13 (13page)

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초록· 키워드

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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.

목차

Abstract
1. Introduction
2. Design of Contra Rotating Fan Blade
3. Analytical Approach
4. Modal Analysis of Contra-Rotating Fan Stage
5. Analysis of Contra-Rotating Fan Rotors
6. Structural Analysis
7. Conclusion
References

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