Theoretical and experimental studies on the hydrodynamic damping of elastic rotating propeller blades
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The hydrodynamic damping characteristics of elastic rotating propeller blades are investigated theoretically and experimentally. Firstly, the modal hydrodynamic damping ratio of propeller blade rotating in water is theoretically predicted based on the cantilever plate theory. Then, a series of tests are designed to determine the mechanical, acoustic radiation and hydrodynamic damping of the first-order bending mode of the rotating blade. During the hydrodynamic damping test, the bending vibration of the blade is excited by the rotation-induced turbulence and measured by two strain gauges attached to the blade root. The results show that the theoretical prediction is in good agreement with the experimental results. The hydrodynamic damping increases linearly with the rotational speed of the propeller. Theoretical analysis also shows that the modal hydrodynamic damping ratio of the first-order bending mode is much larger than that of higher-order bending modes. The hydrodynamic damping decays exponentially with the increase of frequency ratio while increases slightly with the increase of propeller advance ratio which represents the ratio of free stream fluid speed to the propeller tip speed.
Abstract
The hydrodynamic damping characteristics of elastic rotating propeller blades are investigated theoretically and experimentally. Firstly, the modal hydrodynamic damping ratio of propeller blade rotating in water is theoretically predicted based on the cantilever plate theory. Then, a series of tests are designed to determine the mechanical, acoustic radiation and hydrodynamic damping of the first-order bending mode of the rotating blade. During the hydrodynamic damping test, the bending vibration of the blade is excited by the rotation-induced turbulence and measured by two strain gauges attached to the blade root. The results show that the theoretical prediction is in good agreement with the experimental results. The hydrodynamic damping increases linearly with the rotational speed of the propeller. Theoretical analysis also shows that the modal hydrodynamic damping ratio of the first-order bending mode is much larger than that of higher-order bending modes. The hydrodynamic damping decays exponentially with the increase of frequency ratio while increases slightly with the increase of propeller advance ratio which represents the ratio of free stream fluid speed to the propeller tip speed.
참고문헌 (32)
- Blake, W., "The radiation from free-free beams in air and in water", J. Sound Vib, 33, pp.427~450 (1974)
- Blake, W. K., "On the flow- excited vibrations of cantilever struts in water. i. flow- induced damping and vibration", J. Acoust. Soc. Am, 57, pp.610~625 (1975)
- Chae, E. J., "Numerical and experimental investigation of natural flow-induced vibrations of flexible hydrofoils", Phys. Fluids, 28, pp.075102~ (2016)
- Chae, E. J., "Dynamic response and stability of a flapping foil in a dense and viscous fluid", Phys. Fluids, 25, pp.104106~ (2013)
- Chae, E. J., "Influence of flow-induced bendetwist coupling on the natural vibration responses of flexible hydrofoils", J. Fluid Struct, 69, pp.323~340 (2017)
- Chen, H., "Numerical and experimental studies on the hydrodynamic damping of a zero-thrust propeller", J. Fluid Struct, 94, pp.102957~ (2020)
- Chen, Y., "Longitudinal vibration of marine propeller-shafting system induced by inflow turbulence", J. Fluid Struct, 68, pp.264~278 (2017)
- Ducoin, A., "Hydroelastic response and stability of a hydrofoil in viscous flow", J. Fluid Struct, 38, pp.40~57 (2013)
- Gibbs IV, S. C., "Linear Aeroelastic Stability of Beams and Plates in Three-Dimensional Flow", 박사, pp.2012
- He, X., "Hydroelastic optimisation of a composite marine propeller in a non-uniform wake", Ocean. Eng, 39, pp.14~23 (2012)
- Kang, W., "The random vibration and force transmission characteristics of the elastic propeller-shafting system induced by inflow turbulence", Ocean Eng, 188, pp.106317~ (2019)
- Kohtanen, E. A., "Hydroelastic damping of low aspect ratio cantilevered plates", J. Fluid Struct, 90, pp.315~333 (2019)
- Vibration of Plates vol. 160, "Leissa, A. W.", Scientific and Technical Information Division, National Aeronautics and Space Administration, ~ (1969)
- Li, J., "Investigation of added mass and damping coefficients of underwater rotating propeller using a frequency-domain panel method", J. Sound Vib, 432, pp.602~620 (2018)
- Li, J., "Hydroelastic analysis of underwater rotating elastic marine propellers by using a coupled bem-fem algorithm", Ocean Eng, 146, pp.178~191 (2017)
- Li, J. s., "Numerical analysis of added mass and damping of elastic hydrofoils", J. Hydrodyn, 32, pp.1009~1023 (2020)
- Mao, Y., "Influence of skew on the added mass and damping characteristics of marine propellers", Ocean Eng, 121, pp.437~452 (2016)
- Milne-Thomson, L. M., "Theoretical Aerodynamics" (1973), Courier Corporation
- Added Mass and Damping of Vibrating Propellers, "Parsons, M. G.", University of Michigan, ~ (1980)
- Qu, Y., "Structural vibration and acoustic radiation of coupled propeller-shafting and submarine hull system due to propeller forces", J. Sound Vib, 401, pp.76~93 (2017)
- Reese, M.C, "Vibration and Damping of Hydrofoils in Uniform Flow", 석사, pp.2010
- Sears, W. R., "Some aspects of non-stationary airfoil theory and its practical application", J. Aeronaut. Sci, 8, pp.104~108 (1941)
- Soltani Dehkharqani, A., "A review of available methods for the assessment of fluid added mass, damping, and stiffness with an emphasis on hydraulic turbines", Appl. Mech. Rev, pp.70~ (2018)
- Suo, Z., "Hydroelasticity of rotating bodiesdtheory and application", Mar. Struct, 9, pp.631~646 (1996)
- Theodorsen, T., "General Theory of Aerodynamic Instability and the Mechanism of Flutter", ~ (1949)
- Tong, X., "Random response of highly skewed propeller-shafting system induced by inflow turbulence", Ocean Eng, 195, pp.106750~ (2020)
- Dynamic Response of an Elastic Propeller to a Non-uniform Inflow, "Tsushima, H.", Pennsylvania state univ university park ordnance research lab, ~ (1972)
- Xie, X., "Active vibration control of a timevarying shafting system using an adaptive algorithm with online auxiliary filter estimation", J. Sound Vib, 513, pp.116430~ (2021)
- Xie, X., "Theoretical analysis on vibration transmission control in a shaft-hull system excited by propeller forces via an active multi-strut assembly", Ocean Eng, pp.221~ (2021)[DOI]
- Young, Y. L., "Time-dependent hydroelastic analysis of cavitating propulsors", J. Fluid Struct, 23, pp.269~295 (2007)
- Young, Y. L., "Fluidestructure interaction analysis of flexible composite marine propellers", J. Fluid Struct, 24, pp.799~818 (2008)
- Young, Y. L., "Hybrid algorithm for modeling of fluidstructure interaction in incompressible, viscous flows", Acta Mech. Sin, 28, pp.1030~1041 (2012)