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De-icing

Numerical and experimental investigation of the design of a piezoelectric de-icing system for small rotorcraft part 2/3: investigation of transient vibration during frequency sweeps and optimal piezoelectric actuator excitation

Numerical and experimental investigation of the design of a piezoelectric de-icing system for small rotorcraft part 2/3: investigation of transient vibration during frequency sweeps and optimal piezoelectric actuator excitation

... 2.2. Results Using frequency sweeps to achieve de-icing on a structure has been proven successful in a previous study [ 4 ]. Ice cracking and delamination was only achieved in the past when sweeping through ...

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Numerical and experimental investigation of the design of a piezoelectric de-icing system for small rotorcraft

Numerical and experimental investigation of the design of a piezoelectric de-icing system for small rotorcraft

... 2.4.1 ANALYSIS FOR EXPERIMENTAL SETUP DESIGN 2.4.1.1 INVESTIGATION OF POSITIONING WITH CONCENTRATED FORCE LOADS With the frequency response direct steady-state dynamic analysis it is possible to apply different load ...

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Modeling and optimizing a road de-icing device by a nonlinear heating.

Modeling and optimizing a road de-icing device by a nonlinear heating.

... In order to design a road de-icing device by heating, we consider in the one dimensional setting the optimal control of a parabolic equation with a non linear boundary condition of the Stefan-Boltzmann type. Both ...

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Modeling and optimizing a road de-icing device by a nonlinear heating

Modeling and optimizing a road de-icing device by a nonlinear heating

... Abstract. In order to design a road de-icing device by heating, we consider in the one dimensional setting the optimal control of a parabolic equation with a nonlinear boundary condition of the Stefan– Boltzmann ...

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Numerical and experimental investigation of the design of a piezoelectric de-icing system for small rotorcraft part 3/3: numerical model and experimental validation of vibration-based de-icing of a flat plate structure

Numerical and experimental investigation of the design of a piezoelectric de-icing system for small rotorcraft part 3/3: numerical model and experimental validation of vibration-based de-icing of a flat plate structure

... A numerical model of a piezoelectric actuator de-icing system integrated to a flat plate structure was developed in the first phase of this research project [ 14 ]. An ice layer was added to this model and ...

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A non-overlapping optimized Schwarz method for the heat equation with non linear boundary conditions and with applications to de-icing

A non-overlapping optimized Schwarz method for the heat equation with non linear boundary conditions and with applications to de-icing

... Abstract When simulating complex physical phenomena such as aircraft icing or de-icing, several dedicated solvers often need to be strongly coupled. In this work, a non-overlapping Schwarz method is ...

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Numerical and experimental investigation of the design of a piezoelectric de-icing system for small rotorcraft part 1/3: development of a flat plate numerical model with experimental validation

Numerical and experimental investigation of the design of a piezoelectric de-icing system for small rotorcraft part 1/3: development of a flat plate numerical model with experimental validation

... In addition to experimental testing, numerical modelling of piezoelectric de-icing systems has been investigated by the scientific community. Palacios [ 11 , 12 ] implemented a 3D finite element model and used it ...

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Anti- and de-icing methods for rotorcraft applications: a critical review

Anti- and de-icing methods for rotorcraft applications: a critical review

... In-flight and ground icing has historically posed a significant problem for all types of aircraft, and has been determined to be the cause of numerous accidents. Canadian airsp[r] ...

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Ice Interface Evolution Modelling Algorithms for Aircraft Icing

Ice Interface Evolution Modelling Algorithms for Aircraft Icing

... length than ice coverage, whereas ice coverage might be more significant for the design of de-icing devices. Thus, a thorough approach to evaluate ice shapes and compare them to other results is to consider ...

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Cockpit Weather Information System Requirements for Flight Operations in Icing Conditions

Cockpit Weather Information System Requirements for Flight Operations in Icing Conditions

... known icing can cross a variety of sizes and powerplants ...in icing conditions fall mainly under two categories: anti-icing and de-icing ...

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Airfoil-flap performance with de/anti-icing fluids and freezing precipitation

Airfoil-flap performance with de/anti-icing fluids and freezing precipitation

... 1 Introduction Previous studies have focused on the aerodynamic performance effects of uncontaminated Type I (de-icing) and Type II (anti-icing) fluids on wind tunnel models and on aircraft wings in flight ...

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An implicit time marching Galerkin method for the simulation of icing phenomena with a triple layer model

An implicit time marching Galerkin method for the simulation of icing phenomena with a triple layer model

... Finally, the capabilities of the method to treat unsteady cases was demonstrated. A situation of delayed system activation was considered. Indeed, it is to deal with such unsteady cases that the present method was ...

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Modeling of Thin Water Films on Swept Wings in Icing Condition

Modeling of Thin Water Films on Swept Wings in Icing Condition

... anti- icing and/or de-icing systems to protect critical ...the icing envelope and certification requirements for regular supercooled droplets ...

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Investigation of tolerance for icing of small UAV rotors/propellers Phase 1

Investigation of tolerance for icing of small UAV rotors/propellers Phase 1

... 2 ICING OF SMALL UAS PROPELLERS – LITERATURE REVIEW Propellers are the predominant type of propulsion used to power unmanned air systems, especially small ...conditions. Icing of the blades reduces their ...

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Three Dimensional Numerical Predicton of Icing Related Power and Energy Losses on a Wind Turbine

Three Dimensional Numerical Predicton of Icing Related Power and Energy Losses on a Wind Turbine

... lightest icing conditions result in a roughened surface, which is sufficient to bring about an early laminar-to-turbulent transition of the boundary layer (Schlichting, 1979) (Busch, 2009) (Turner, Hubbe-Walker, ...

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Investigation of tolerance for icing of small UAV rotors/propellers - Phase 2 - NRC Publications Archive - Canada.ca

Investigation of tolerance for icing of small UAV rotors/propellers - Phase 2 - NRC Publications Archive - Canada.ca

... Classification: Unclassified NRC-CNRC Distribution: Unlimited Page 12 of 47 a turntable where the four bolts holding the disc to the flat plate can be unbolted and the whole nacelle/strut/disc assembly can be rotated. A ...

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A method of protecting a VHF yagi antenna from severe icing

A method of protecting a VHF yagi antenna from severe icing

... L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB. NRC Publicat[r] ...

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A modified method of protecting a VHF antenna from severe icing (supplement to report ERA-276)

A modified method of protecting a VHF antenna from severe icing (supplement to report ERA-276)

... L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB. NRC Publicat[r] ...

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In-cloud icing and supercooled cloud microphysics : from reanalysis to mesoscale modeling

In-cloud icing and supercooled cloud microphysics : from reanalysis to mesoscale modeling

... In-cloud icing is continually associated with potential hazardous meteorological conditions at higher altitudes in the troposphere across the world and near surface over mountainous and cold climate ...in-cloud ...

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Aircraft measurements of icing in supercooled and water droplet / ice crystal clouds

Aircraft measurements of icing in supercooled and water droplet / ice crystal clouds

... L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignemen[r] ...

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