convergent duct

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• convergent duct — A duct whose cross sectional area decreases in the direction of fluid flow …   Aviation dictionary

• convergent-divergent duct — A duct that has a decreasing cross section in the direction of fluid flow is convergent, until a minimum area is reached. Thereafter, the cross section increases, or becomes divergent. Relationship of pressure, temperature, and velocity in a… …   Aviation dictionary

• convergent-divergent exhaust duct — An exhaust duct used in supersonic aircraft. The cross sectional area of the duct decreases in the direction of the airflow until it is so small that the gas flow becomes supersonic. Thereafter, the duct enlarges so the gases further speed up… …   Aviation dictionary

• convergent-divergent inlet — A supersonic inlet duct. The forward section is convergent to increase pressure and reduce air velocity to a subsonic speed. The aft section is divergent to further increase air pressure and slow airflow to approximately Mach 0.5 before entering… …   Aviation dictionary

• bell-mouth inlet duct — A form of convergent inlet air duct used to direct air into the inlet of a gas turbine engine. The area of the duct gets smaller as the air flows into the engine. The duct is very efficient, especially where ram pressures are low, as in… …   Aviation dictionary

• Components of jet engines — Diagram of a typical gas turbine jet engine. Air is compressed by the fan blades as it enters the engine, and it is mixed and burned with fuel in the combustion section. The hot exhaust gases provide forward thrust and turn the turbines which… …   Wikipedia

• Jet engine — For a general overview of aircraft engines, see Aircraft engine. A Pratt Whitney F100 turbofan engine for the …   Wikipedia

• Airbreathing jet engine — An airbreathing jet engine (or ducted jet engine) is a jet engine propelled by a jet of hot exhaust gases formed from air that is drawn into the engine via an inlet duct. All practical airbreathing jet engines are internal combustion engines that …   Wikipedia

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• 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

• SOFAR channel — The SOFAR channel (short for Sound Frequency and Ranging channel), or deep sound channel (DSC),[1] is a horizontal layer of water in the ocean at which depth the speed of sound is minimal. The SOFAR channel acts as a waveguide for sound, and low… …   Wikipedia