In the present paper, a hydrodynamic bird material model made up of water and air mixture is developed, which produces good correlation with the measured strain-gauge test data in a panel test. This parametric bird projectile model is used to generate the time-history of the transient dynamic loads on the turbofan engine blades for different size birds impacting at varying span locations of the fan blade. The problem is formulated in 3D vector dynamics equations using a nonlinear trajectory analysis approach. The analytical derivation captures the physics of the slicing process by considering the incoming bird in the shape of a cylindrical impactor as it comes into contact with the rotating fan blades modeled as a pretwisted plate with a camber. The contact-impact dynamic loading on the airfoil produced during the bird-strike is determined by solving the coupled nonlinear dynamical equations governing the movement of the bird-slice in time-domain using a sixth-order Runge-Kutta technique. The analytically predicted family of load time-history curves enables the blade designer to readily identify the critical impact location for peak dynamic loading condition during the bird-ingestion tests mandated for certification by the regulatory agencies.
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e-mail: Kevin.Turner1@.ge.com
e-mail: Nitesh.Jain@ge.com
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December 2011
Research Papers
Dynamic Loading on Turbofan Blades Due to Bird-Strike
Kevin E. Turner,
e-mail: Kevin.Turner1@.ge.com
Kevin E. Turner
GE Aviation, M.D.: G-36, General Electric, 1 Neumann Way, Cincinnati
, OH 45215
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Nitesh Jain
e-mail: Nitesh.Jain@ge.com
Nitesh Jain
Bangalore Engineering Center
, JFWTC, Whitefield Road, Bangalore-560066, Karnataka, India
Search for other works by this author on:
Kevin E. Turner
GE Aviation, M.D.: G-36, General Electric, 1 Neumann Way, Cincinnati
, OH 45215e-mail: Kevin.Turner1@.ge.com
Nitesh Jain
Bangalore Engineering Center
, JFWTC, Whitefield Road, Bangalore-560066, Karnataka, India
e-mail: Nitesh.Jain@ge.com
J. Eng. Gas Turbines Power. Dec 2011, 133(12): 122504 (13 pages)
Published Online: September 1, 2011
Article history
Received:
April 9, 2011
Revised:
April 11, 2011
Online:
September 1, 2011
Published:
September 1, 2011
Citation
Sinha, S. K., Turner, K. E., and Jain, N. (September 1, 2011). "Dynamic Loading on Turbofan Blades Due to Bird-Strike." ASME. J. Eng. Gas Turbines Power. December 2011; 133(12): 122504. https://doi.org/10.1115/1.4004126
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