Computational Modeling of Ice Cracking and Break-up from Helicopter Blades

Zhang, Shiping; Khurram, Rooh Ul Amin; Fouladi, Habibollah; Habashi, Wagdi G.

doi:10.2514/6.2012-2675

Cited by 4 publications

(3 citation statements)

References 6 publications

(1 reference statement)

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“…In response, some effort has been made to develop codes to model the breakup and shedding of ice on rotor blades. The only current code with such models known to exist to the author is FENSAP-ICE [7,93,94]. The model incorporated into FENSAP-ICE meshes the ice shape and tracks crack growth through the ice shape.…”

Section: Ice Shedding In a Rotating Environmentmentioning

confidence: 99%

“…During the process of delamination, the breaking of adhesion can be treated as a fracture mechanics problem [93,114,135]. The formation of a crack followed by the propagation of the crack leads to total adhesive, cohesive, or mixed failure of the interface, allowing ice to break free of a surface.…”

Section: Creep and Fracturementioning

confidence: 99%

“…The onset of crack formation likely leads to some scatter in the available data, while the propagation of the crack is poorly understood and difficult to model. Shiping et al were able to complete a 3D analysis of ice shapes on rotors and follow crack propagation through an ice shape [93]. The same group also simulated crack propagation through airframe icing [94].…”

Section: Creep and Fracturementioning

confidence: 99%

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The measurement of the adhesion of glaze ice.

Hardesty¹

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Icing is a lethal and costly aviation hazard affecting aircraft of all sizes ranging from small UAVs to large commercial craft such as the Boeing 787, resulting in hundreds of deaths over the last century and resulting in billions of dollars of economic impact. Three predominant types of icing, namely, airframe icing, engine icing, and rotorcraft icing, dominate aircraft icing research. Each type poses unique challenges. In the case of rotor icing, attention needs to give to the rotating environment with large oscillatory loads and icing conditions. In the case of airframe icing, special attention needs to be paid to a variety of loading cases from the available options for de-icing and anti-icing equipment. In the case of engine icing, the formation mechanism is poorly understood and the structure of the ice needs to be studied in greater detail. Airframe icing requires However, all three share the same fundamental problem that ice sticks to surfaces. How strongly ice adheres to a surface dictates how hard it is to remove. The adhesion strength then regulates the primary threat from icing-the maximum aerodynamic penalty that accretion will have. It also dictates the threat of impingement from shed ice elsewhere on the aircraft, such that a piece of ice from the main rotor could strike the tail rotor on a helicopter, destroying it.

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Section: Ice Shedding In a Rotating Environmentmentioning

confidence: 99%

Section: Creep and Fracturementioning

confidence: 99%

Section: Creep and Fracturementioning

confidence: 99%

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The measurement of the adhesion of glaze ice.

Hardesty¹

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Numerical simulation of ice shedding motion characteristic on airfoil surface

et al. 2023

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In order to accurately predict the motion trajectory of ice shedding and ensure the safe flight of aircraft, the motion characteristics of ice shedding under two-dimensional (2D) and three-dimensional (3D) conditions are simulated and analyzed. Considering the influence of any possible shape of shedding ice and its rotation and the magnitude and direction of acceleration with time under aerodynamic force, a six degree-of-freedom analysis method is introduced in this paper. This paper proposes a theoretical model, which can be used to calculate the 3D trajectory of ice shedding with arbitrary shape. The dynamic analysis of real 3D shedding ice is carried out, and the motion behavior of shedding ice with different positions and shapes is calculated. The results show that the movement mode of the shedding ice after leaving the aircraft is translation and rotation. The shape of the low-speed region on the leeward side of the shedding ice will first increase, then decrease, and then increase with the rotation of the ice body. The influence of ice shape on ice shedding trajectory is mainly that the shedding ice continues to flip during the downstream movement of the flow field, and the projected area of the effective windward area in the lift and the drag direction changes with time. The average deviation of the shedding ice at position 5 along the spanwise is only 22.9% of that at position 1. Finally, the closer the initial position of ice shedding is to the airfoil root, the greater the probability of ice shedding hitting the aircraft fuselage. In this paper, the probability of ice shedding hitting the aircraft fuselage is 8%, which all occurred in the case with position 1 as the initial position of ice shedding.

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Numerical Simulation of Helicopter Blade Ice Shedding using a Bilinear Cohesive Zone Model

Chen

2015

SAE Technical Paper Series

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Computational Modeling of Ice Cracking and Break-up from Helicopter Blades

Cited by 4 publications

References 6 publications

The measurement of the adhesion of glaze ice.

The measurement of the adhesion of glaze ice.

Numerical simulation of ice shedding motion characteristic on airfoil surface

Numerical Simulation of Helicopter Blade Ice Shedding using a Bilinear Cohesive Zone Model

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