Air knife

Air knife

An air knife is normally used in manufacturing or as the first step in a recursive recycling process to separate lighter or smaller particles from other components for use in later or subsequent steps, post manufacturing parts drying and conveyor cleaning, part of component cleaning. The knife consists of a high intensity, uniform sheet of laminar airflow sometimes known as streamline flow.

When a fluid flows in parallel layers, with no disruption between the layers it has laminar characteristics.

Fluid dynamics: Laminar flow is a flow regime characterized by high momentum diffusion, low momentum convection, and pressure and velocity independence from time. It is the opposite of turbulent flow. The dimensionless Reynolds number characterizes whether flow conditions lead to laminar or turbulent flow.

Aeronautics: Air flowing over an aircraft wing. The boundary layer is a very thin sheet of air lying over the surface of the wing, as well as all other surfaces of the craft. Because air has viscosity, this layer of air tends to adhere to the wing. As the wing moves forward through the air, the boundary layer at first flows smoothly over the streamlined shape of the airfoil. In this aspect the flow is called laminar or the laminar layer.

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Look at other dictionaries:

  • air knife — /ˈɛə naɪf/ (say air nuyf) noun (plural air knives) a tool which is designed to clean excess liquid or debris from a surface by directing a thin, bladelike stream of air at high pressure over it …   Australian English dictionary

  • air knife — noun : a blade in a papermaking machine for removing excess coating from newly coated paper by means of an air blast …   Useful english dictionary

  • Air knife — Воздушный ракель …   Краткий толковый словарь по полиграфии

  • Air knife coating of paper — Мелование бумаги с помощью воздушного ракеля …   Краткий толковый словарь по полиграфии

  • Knife legislation — is legislation regarding knives. Having the potential to be used as offensive weapons, carrying knives in public is forbidden by law in many countries. Exceptions may be made for hunting knives, and for knives used for work related purposes (e.g …   Wikipedia

  • Air & Style — Zweck: Wintersport, Snowboard Vorsitz: Andrew Hourmont, Koordinator Gründungsdatum: 1994 Sitz: Innsbruck, Österreich Website …   Deutsch Wikipedia

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  • knife — knife1 [ naıf ] (plural knives [ naıvz ] ) noun count *** an object with a sharp blade for cutting food: You need a sharp knife for the steak. knives and forks a kitchen/bread/carving knife a. an object with a blade, used as a weapon or tool: He… …   Usage of the words and phrases in modern English

  • knife — I UK [naɪf] / US noun [countable] Word forms knife : singular knife plural knives UK [naɪvz] / US *** an object with a sharp blade for cutting food You need a sharp knife for the steak. knives and forks a kitchen/bread/carving knife a) an object… …   English dictionary

  • knife — knife1 W3S3 [naıf] n plural knives [naıvz] ↑flipper, ↑knife, ↑tank, ↑wetsuit [: Old English; Origin: cnif] 1.) a metal blade fixed into a handle, used for cutting or as a weapon →↑scalpel ▪ a knife and fork …   Dictionary of contemporary English

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