FENSAP-ICE: Unsteady Conjugate Heat Transfer Simulation of Electrothermal De-Icing

Reid, Thomas; Baruzzi, Guido S.; Habashi, Wagdi G.

doi:10.2514/1.c031607

Cited by 49 publications

(33 citation statements)

References 28 publications

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“…There is a droplet shadowed zone when the wrap distance exceeds 0.03 m, where the local collection efficiency is zero. The simulated temperature of heater 3 is shown in Figure 8 with the experimental result and FENSAP simulated result provided in [18]. The temperature variation curve of each cycle is similar except for the beginning period when the solid structure starts to warm up.…”

Section: International Journal Of Aerospace Engineeringmentioning

confidence: 84%

“…The mass and energy balance equations took into account the input water caused by droplet impingement, but the water film runback mechanism was not taken into consideration. Habashi et al [18][19][20] developed a conjugate model for the in-flight deicing process. The airflow and droplet impingement were calculated as initial solutions, and the solid conduction was solved, which was coupled with a water phase transition in a loosely coupled way.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Unsteady Conjugate Heat Transfer of Electrothermal Deicing Process

Lin

Shen

et al. 2018

International Journal of Aerospace Engineering

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A novel 3-D unsteady model of in-flight electrothermal deicing process is presented in this paper to simulate the conjugate mass and heat transfer phenomena of water film runback, phase change, and solid heat conduction. Mathematical models of water film runback and phase change are established and solved by means of a loosely coupled method. At the current time step, solid heat conduction, water film runback, and phase change are iteratively solved until the heat boundary condition reaches convergence, then the temperature distribution and ice shape at the moment are obtained, and the calculation of the next time step begins subsequently. A deicing process is numerically simulated using the present model following an icing tunnel experiment, and the results match well with those in the literatures, which validate the present model. Then, an in-flight deicing process is numerically studied to analyze the effect of heating sequence.

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Section: International Journal Of Aerospace Engineeringmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Unsteady Conjugate Heat Transfer of Electrothermal Deicing Process

Lin

Shen

et al. 2018

International Journal of Aerospace Engineering

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“…At each time step, the surface temperature is determined by the coupling of internal skin heat conduction and external air-droplet flow heat transfer. Considering that the ice thickness allowed by the electro-thermal deicing system is relatively thin, the external air flow field and the motion of the super-cooled water droplets are slightly affected by the ice layer on the deicing surface, and they are assumed unchanged with time 20 . Moreover, the surface temperature varies within a relatively small range, and the air convective heat transfer coefficient is also regarded to be constant during the entire deicing simulation.…”

Section: Unsteady Deicing Simulation Methods 21 Simulation Procedures mentioning

confidence: 99%

Unsteady simulation of aircraft electro-thermal deicing process with temperature-based method

Shen

Wang

Lin

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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Considering the mass and energy sources carried by the accumulated ice layer, an unsteady heat and mass transfer model of the runback water film on the deicing surface is established to simulate aircraft electro-thermal deicing process. With the extension of the freezing coefficient to the transient calculation, the coupled heat transfer of the runback water and the solid skin is solved at each time step by a temperature-based method. Unsteady numerical simulation is carried out for the electro-thermal deicing system of a NACA 0012 airfoil. The temperature variations with time are in acceptable agreement with the literature data, and the unsteady temperature-based deicing model is verified. The calculation results of temperature, runback water flux and ice thickness on the deicing surface are analyzed at different time points, and it is shown that the unsteady electro-thermal deicing model can capture the main features of the icing, ice melting and re-freezing processes in the transient deicing simulations.

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“…The coupling methods are critical for thermal anti-icing simulations to ensure the convergence of both temperature and heat flow at the runback water film-solid interface. Nearly all the ice accretion and anti-icing codes, such as LEWICE [16], FENSAP-ICE [17], ONERA [18], CANICE [19], and ICECREMO [20], use loose-coupling methods to perform the conjugate heat transfer solution [21]. Considering the runback water thermodynamics as an extra calculation domain, the loose-coupling method solves the control equations of the water film and solid domains individually to provide interface parameters for each other [22].…”

Section: Introductionmentioning

confidence: 99%

Study on Loose-Coupling Methods for Aircraft Thermal Anti-Icing System

et al. 2020

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To simulate aircraft thermal anti-icing systems and solve the conjugate heat transfer of air-droplet flow and solid skin, the heat and mass transfer model of the runback water on the anti-icing surface was combined with the heat conduction equation of the skin by loosely coupled methods. According to the boundary conditions used for the runback water conservation equations, two loose-coupling methods for the heat exchange between the runback water and the solid skin were developed based on surface heat flow and surface temperature, respectively. The anti-icing and ice accretion results of a NACA 0012 electro-thermal anti-icing system were obtained by the two loose-coupling methods. The heat flow-based method directly solves the thermodynamic model of the runback water without any extra assumptions, but the convergence rate is relatively slow. On the other hand, the temperature-based method achieves higher calculation speed, but the freezing point is extended to an artificial temperature range between water and ice phases. When the value of the artificial temperature range is small, the results obtained by the temperature-based method are consistent with those of the heat flow-based method, indicating that the effect of freezing point extension can be ignored for thermal anti-icing simulation. Furthermore, the solutions of the two methods are in acceptable and comparable agreement with the experimental and simulative results in the literature, confirming their feasibility and effectiveness. In addition, it is found that the ice thicknesses and ice shapes rise obviously near the runback water limits as a result of the transverse heat conduction of the solid skin.

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FENSAP-ICE: Unsteady Conjugate Heat Transfer Simulation of Electrothermal De-Icing

Cited by 49 publications

References 28 publications

Numerical Simulation of Unsteady Conjugate Heat Transfer of Electrothermal Deicing Process

Numerical Simulation of Unsteady Conjugate Heat Transfer of Electrothermal Deicing Process

Unsteady simulation of aircraft electro-thermal deicing process with temperature-based method

Study on Loose-Coupling Methods for Aircraft Thermal Anti-Icing System

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