航空術(shù)語(yǔ)詞典 Dictionary of Aeronautical Terms 上

時(shí)間：2011-03-11 23:11來(lái)源：藍(lán)天飛行翻譯 作者：admin 點(diǎn)擊：次

When the block floats, it displaces, or takes the place of, its own weight of water.
burble (aerodynamic turbulence). Turbulence which forms on an airfoil surface when the angle of attack becomes so great that the air no longer flows smoothly over the surface but breaks away.
burble point (aerodynamic turbulence). The angle of attack at which air flowing over an aerodynamic surface no longer flows smoothly, but breaks away and forms a turbulent flow (it burbles).
burn-down coat (aircraft finishing system). A coat of lacquer or dope in which some of the thinner is replaced with an equal amount of retarder.
When this mixture is sprayed over a blushed surface, the thinner softens and restores the blushed material. The retarder slows the drying so the new film will not blush.
burner cans (gas turbine engine component). Individual combustion chambers of a gas turbine engine.
burner compartment. The portion of an engine pod or nacelle of a turbojet-powered aircraft that houses the burner section of the engine.
burner pressure (gas turbine engine parameter). The static pressure inside the combustors, or burners, of a gas turbine engine. Burner pressure, whose symbol is Pb, is one of the parameters used to compute the mass airflow through the engine.
burner. See combustor.
burning. The process in which a material is consumed by fire. The material, called the fuel, is consumed when it reacts with the oxygen in the air to form new compounds. These compounds usually include carbon dioxide and water. In the process of burning, a large amount of heat and light are usually produced.
burning in (electronic components). A process in the manufacture of sensitive electronic equipment in which the equipment is operated for a specified period of time. The burning-in period shows up weak or faulty components, and stabilizes the operating characteristics of the components.
burning point (petroleum specification). The lowest temperature at which a petroleum product in an open container will continue to burn when it is ignited by an open flame held near its surface.
burnish (verb). To smooth the surface of metal that has been damaged by a deep scratch or gouge.
The metal that has piled up at the edge of the damage is pushed back into the damage with a smooth, hard steel burnishing tool.
burr (type of metal damage). A sharp, rough edge of a piece of metal left when the metal is sheared, punched, or drilled.
burst RPM (gas turbine engine parameter). The compressor speed of an engine at which the centrifugal loads are so high the compressor will fly apart. The engine actually explodes.
bus (electrical system). A point within an electrical system from which the individual circuits get their power.
bus bar (aircraft electrical system component). A power distribution point in an aircraft electrical system.
Bus bars are usually strips of metal to which generator or battery power is connected and from which circuit breakers pick up this power and carry it to the appropriate circuits within the aircraft.

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