摘要:
L'invention a pour objet une méthode de régulation de la vitesse NR d'entraînement en rotation d'un rotor de giravion. Par suite d'une détection d'une évolution du giravion sous conditions givrantes dans un domaine critique de températures (Dtc) préalablement identifié, la vitesse NR est soit diminuée dans le cas où la température (OAT) de l'air extérieur ambiant est comprise dans une plage givrante de températures basses (Ptb) du domaine critique de températures (Dct), soit augmentée dans le cas où la température (OAT) de l'air extérieur ambiant est comprise dans une plage givrante de températures hautes (Pth) du domaine critique de températures (Dct).
摘要:
A coating includes at least one coating layer containing first particles, second particles, and third particles distributed throughout a cross-linked, continuous polymer matrix. An outer surface of the coating layer includes surfaces of at least first particles extending outward from a top periphery of the polymer matrix. The outer surface exhibits a property of delaying ice formation compared to the coating layer without the first particles. A method includes applying a coating composition in one application step. The one-step coating composition contains first particles, second particles, and third particles in a base containing a polymer. A coating composition includes first particles, second particles, and third particles distributed in a matrix precursor.
摘要:
The present invention relates to rotor blades of assemblies, in particular of wind turbines, having an anti-icing coating, and to a method for the production and the use thereof.
摘要:
Global icephobic performance of a passive deicing structure may be achieved by including one or more ice nucleating zones (32) that are configured, preselected, and/or arranged to promote selective formation of ice. Ice nucleation zones may be configured, preselected, and/or arranged to form ice that is weakly adherent and, hence, may be removed by sufficient shear force. Ice nucleation zones typically include nucleating particles to promote selective ice formation. Passive deicing structures typically include both ice nucleation zones (32) and ice resisting zones (34), arranged to facilitate ice removal by shear force. Passive deicing structures may be used on apparatuses such as vehicles (e.g., aircraft) to mitigate the effects of ice formation on exposed surfaces.
摘要:
The invention relates to a method of manufacturing a sound absorbing panel (107) according to which a reflective wall (112) is added to at least one part of one of the faces (111, 113) of a set of sound absorbing cells. The method according to the invention is remarkable in that at least one passage (118) on one portion of the thickness (E) of said assembly is formed on the face (111, 113) opposite said one of the faces (111, 113), said passage (118) forming at least one main communication channel (119) between the cells and is intended for the circulation of a deicing fluid.
摘要:
Method of controlling the morphology of self-assembled monolayers (SAMS) on substrates having hydrophilic surfaces. The hydrophilic surface is exposed to a fluid having a mixture of molecules which can self-assemble on the hydrophilic surface and hydrophobic molecules for a sufficient length of time so that the molecules which can self-assemble on the hydrophilic surface form a complete self-assembled monolayer. In a particular embodiment octadecylphosphonic acid (OPA) molecules have been self-assembled on oxidized substrates including but not limited to mica, silicon, sapphire, quartz and aluminum by spin-coating a solution containing the octadecylphosphonic acid (OPA) molecules and hydrophobic molecules such as chloroform or trichloroethylene under a controlled relative humidity. Control of the morphology of OPA SAMs is affected by adjusting humidity and the duration of spin-coating. Atomic force microscopy revealed that relative humidity has a profound influence on the morphology of the OPA SAMs formed. When sufficient molecules are applied either consecutively or separately, the final morphology will be a complete monolayer, regardless of the relative humidity.
摘要:
This invention discloses novel catalyzed surface coating additives and catalyzed surface coating systems, which contain one or more catalysts, along with optional other ingredients, wherein the catalysts serve to effect in situ chemical bonding reactions in that the catalysts function to initiate, to promote, to accelerate, and/or to increase the formation and yield of persistent, solid, corrosion resistant, impact resistant, wear resistant, and/or non-stick surface coating films which may exhibit pigmentation and other aesthetic features, and may be designed to be environmentally benign.
摘要:
An anti-icing blanket (112) for preventing the accumulation of ice on aircraft surfaces due to cold soaked fuel (120) disposed beneath the surface comprises a thermally insulative layer (126) bonded to the aircraft surface and an erosion resistant layer (122) disposed over the insulative layer (126).
摘要:
Appareil de dégivrage comprenant une source de chaleur (20) pour produire la chaleur de dégivrage sur une partie du corps d'un objet et un dispositif de distribution de chaleur (22) pour répartir la chaleur de dégivrage sur une ou plusieurs zones de surface devant être dégivrées. Le dispositif de distribution de chaleur (22) comprend des bandes ou des canaux minces de matériau distributeur de chaleur (30) ayant une conductibilité de chaleur plus grande que le matériau avec lequel le reste de l'objet est formé. Une extrémité ou une partie de chaque bande ou canal (32) du matériau de distribution de chaleur (30) est en contact avec la source de chaleur (20) même ou en contact avec un matériau d'enrobage hautement conducteur de chaleur (28) dans lequel la source de chaleur (20) est fixée. Une autre partie de chaque bande ou de chaque canal de matériau de distribution de chaleur (30) constitue de préférence une partie d'une des zones de surface devant être dégivrées. Le dispositif de distribution de chaleur (22) conduit de la chaleur d'une source de chaleur se trouvant à distance (20) à chaque surface devant être dégivrée uniquement par l'intermédiaire du matériau de distribution de chaleur (30) hautement conducteur, sans qu'il soit nécessaire d'étendre un élément chauffant à travers chaque surface séparée devant être dégivrée.