primary nozzle

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• primary exhaust nozzle — On a turbofan, the last exhaust nozzle. On an afterburner, the inner exhaust nozzle. See exhaust nozzle …   Aviation dictionary

• nozzle — i. A duct, tube, pipe, spout, or the like through which a fluid is directed and discharged from its open end. It is designed to meter the fluid or to produce a desired direction, velocity, or shape of discharge. Specifically, in gas turbine… …   Aviation dictionary

• primary fuel — i. Fuel that flows from the nozzles in a gas turbine engine under a condition of low airflow. A typical fuel nozzle. ii. Refers to a duplex fuel nozzle and the fuel that initially flows upon starting, usually from the center orifice. Also called… …   Aviation dictionary

• secondary nozzle/exhaust nozzle — An annular nozzle surrounding the primary nozzle of a jet engine. A cooling airflow passes through the secondary nozzle. Separate secondary for fan flow and core engine flow …   Aviation dictionary

• Propelling nozzle — A propelling nozzle is a component of a jet engine that is found at the tail of the engine that operates to form an exhaust jet and to maximise the use of the exhaust gas s energy throughout the engine so that the maximum overall thrust is… …   Wikipedia

• Spray nozzle — A spray nozzle is a device that facilitates the formation of spray. When a liquid is dispersed as a stream of droplets (atomization), it is called a spray. Spray nozzles are used to achieve two primary functions: increase liquid surface area to… …   Wikipedia

• variable-geometry nozzle — A nozzle whose diameter can be changed. It is normally in the shape of a convergent nozzle at subsonic speeds and of a convergent divergent nozzle at supersonic speeds, or when a reheat is on. A variable nozzle permits the use of after burner… …   Aviation dictionary

• spray nozzle — i. A nozzle that carries a proportion of the primary combustion air with the injected fuel. The local fuel rich concentrations produced by other burners are avoided by aerating the spray. Also called an air spray atomizer. ii. A nozzle that… …   Aviation dictionary

• Turbine map — Each turbine in a gas turbine engine has an operating map. Complete maps are either based on turbine rig test results or are predicted by a special computer program. Alternatively, the map of a similar turbine can be suitably scaled. Description… …   Wikipedia

• Kylchap — The Kylchap steam locomotive exhaust system was designed and patented by the famous French steam engineer André Chapelon, using a second stage nozzle designed by the Finnish engineer Kylälä and known as the Kylälä spreader ; thus the name KylChap …   Wikipedia

• Concorde aircraft histories — Twenty Concorde aircraft were built, six for development and 14 for commercial service. These were 2 prototypes 2 pre production aircraft 16 production aircraft The first two of these did not enter commercial service Of the 14 which flew… …   Wikipedia