Finite element studies of the electro impulse de-icing system

Scavuzzo, R. J.; Chu, M. L.; Woods, Edward J.; Khatkhate, A. A.; Raju, R. Srinivasa

doi:10.2514/3.45935

Cited by 10 publications

(5 citation statements)

References 2 publications

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“…9 and Scavuzzo et al. 10 where τmax is the maximum shear stress between the ice and aluminium skin and τU is the shear strength of impact ice. Khatkhate’s and Scavuzzo’s τU are 40 psi (about 0.276 MPa) and 50 psi (about 0.345 MPa), respectively.…”

Section: Transient Dynamics Methods and Experiments Validation Of Eidi mentioning

confidence: 99%

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Modelling electro-impulse de-icing process in leading edge structure and impact fatigue life prediction of rivet holes in critical areas

Zhang

Liang

Lan

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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The de-icing of a wing leading edge using an electro-impulse method benefits from its very low energy requirement and high efficiency. The high-frequency mechanical vibration activated by an electromagnetic pulse coil linked to an impulse circuit fractures the ice accumulating on the leading edge, and the ice is removed very rapidly when flying. An improved de-icing criterion based transient dynamics method is employed to accurately simulate the electro-impulse de-icing (EIDI) process. To reduce computational expenses in modelling all the rivet joints, a simplified model of leading edge structure ignoring all rivets is established using tie-constraints to identify high-stress areas or critical areas of leading edge structure during the EIDI process. Afterwards, a local detailed model of leading edge structure modelling rivets, rivet holes and their surfaces in critical areas, is set up to accurately describe the impact response and stress configuration of leading edge structure during the EIDI process. According to the EIDI local detailed model for leading edge structure, the fatigue life of critical rivet holes is predicted based on the local maximum stresses. Consequently, the endurance strength of the leading edge structure is estimated and a safe assembling scheme of the EIDI system is suggested.

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Section: Transient Dynamics Methods and Experiments Validation Of Eidi mentioning

confidence: 99%

“…Compared with George's de-icing criterion, the improved de-icing criterion emphasizes the de-icing influence of shear stress, which plays an important role during the EIDI process. 10,11 EIDI experiment verification of a flat aluminium plate…”

Section: De-icing Criterionmentioning

confidence: 99%

Modelling electro-impulse de-icing process in leading edge structure and impact fatigue life prediction of rivet holes in critical areas

Zhang

Liang

Lan

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…13 Further development has resulted in applications of the electromechanical system in horizontal and vertical tail planes in business jets. Therefore the combination of electrothermal and electro impulse de-icing was investigated by Al-Khalil et al 4,14 The research of the de-icing simulation by an electro impulse was described at first by Khatkhate et al 16 and Scavuzzo et al 10 The leading edge and the ice layer are modeled by two-dimensional shell elements which are connected by beams, which are used for analyzing adhesion stress. However this modeling approach, restricted by early computer systems, cannot calculate exact stresses, which results in deviation to measured results.…”

Section: Introductionmentioning

confidence: 99%

Coupled Magnetic and Structural Numerical Simulation and Experimental Validation of the Electro Impulse De-Icing

Moehle

Haupt

Horst

2013

54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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The Electro Impulse De-Icing system is an alternative process of deicing wing slat structures made of carbon fiber reinforced plastics or aluminum. It is especially qualified for no-bleed systems that are used in modern and future aircraft. Due to the time dependent interactions between the induced magnetic field and the structural deformation it can be necessary to couple these physical fields in analyses. This paper presents a threedimensional simulation as well as experiments of flat plates. The simulation is characterized by electrical and structural finite element calculations, which are two-way coupled in each time step. The current progress is based on real tests which are executed at a special test rig. A coil, which is connected to an impulse generator, is used to induce magnetic forces. Flat plates of aluminum or carbon reinforced plastics (with an additional aluminum doubler) were tested at room temperature and deformation results were used to validate numerical simulations. Further research deals with the simulation of the deicing process itself with a stress criterion for ice adhesion. Therefore, the test rig is mounted in a cooling chamber. The ice layer is produced by spraying cooled water through a nozzle with a droplet size of supercooled large droplets (SLD). The deformation progress with and without ice is analyzed at different impulse forces and ice thicknesses. The coupled finite element analysis gives the opportunity to simulate the process of de-icing in-situ to the time dependent loading of the plate by magnetic forces. Furthermore the complex dynamic behavior of the structure can be simulated with excellent agreement to real tests.

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“…A finite element model of the EIDI system using MSC Nastran was first developed by Scavuzzo et al. 6 for investigating the physical phenomena. Qiu and Guo 7 carried out some theoretical research on parameter selection of EIDI system.…”

Section: Introductionmentioning

confidence: 99%

“…From literature review, it is seen that previous researches [3][4][5][6]16 mainly focus on the experimental applications and numerical investigations on EIDI system. Available data of peak current and vibration peak acceleration in the EIDI system are sparse.…”

Section: Introductionmentioning

confidence: 99%

On measuring key parameters of an electro-impulse deicing system

Zhu

2018

Proceedings of the Institution of Mechanical Engineers, Part G:

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The peak current and vibration peak acceleration are two important parameters in the electroimpulse deicing system. Available data on two parameters are sparse. An experimental setup to measure the peak current and vibration peak acceleration in the electroimpulse deicing system is presented. The measurement is performed in the icing wind tunnel. Rogowski coil’s principle on pulsed current measurement is applied in the electroimpulse deicing discharge current circuit. It is found that calculated results agree with the measured trend. A piezoelectric vibration acceleration sensor is adopted to measure the vibration peak acceleration. Test results show that when the peak current varies linearly, the vibration peak acceleration increases with the increase of discharge voltages and its variation is approximately linear. The experimental results in the electroimpulse deicing system demonstrate that the proposed measuring method is accurate and reliable.

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Finite element studies of the electro impulse de-icing system

Cited by 10 publications

References 2 publications

Modelling electro-impulse de-icing process in leading edge structure and impact fatigue life prediction of rivet holes in critical areas

Modelling electro-impulse de-icing process in leading edge structure and impact fatigue life prediction of rivet holes in critical areas

Coupled Magnetic and Structural Numerical Simulation and Experimental Validation of the Electro Impulse De-Icing

On measuring key parameters of an electro-impulse deicing system

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