Variable geometry turbocharger — Variable geometry turbochargers (VGTs) are a family of turbochargers, usually designed to allow the effective aspect ratio (sometimes called A/R Ratio) of the turbo to be altered as conditions change. This is done because optimum aspect ratio at… … Wikipedia
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
pop-open nozzle — A nozzle on a jet engine with a variable geometry outlet. This type of nozzle often is found on engines with afterburning. The nozzle generally is fully open (the largest dimension) at idle and progressively closes to the fully closed position at … Aviation dictionary
fixed geometry — i. An aircraft that does not have variable sweep wings. ii. An engine that does not have a variable inlet or nozzle … Aviation dictionary
Turbofan — [ CFM56 3 turbofan, lower half, side view.] A turbofan is a type of jet engine, similar to a turbojet. It essentially consists of a ducted fan with a smaller diameter turbojet engine mounted behind it that powers the fan. Part of the airstream… … Wikipedia
Junkers Jumo 004 — The Jumo 004 was the world s first turbojet engine in production and operational use, and the first successful axial compressor jet engine ever built. Some 8,000 units were manufactured by Junkers in Germany during late World War II and powered… … Wikipedia
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
Diesel engine — Diesel engines in a museum Diesel generator on an oil tanker … Wikipedia
Turbocharger — A turbocharger, or turbo, is an air compressor used for forced induction of an internal combustion engine. Like a supercharger, the purpose of a turbocharger is to increase the mass of air entering the engine to create more power. However, a… … Wikipedia
ГОСТ 23851-79: Двигатели газотурбинные авиационные. Термины и определения — Терминология ГОСТ 23851 79: Двигатели газотурбинные авиационные. Термины и определения оригинал документа: 293. Аварийное выключение ГТД Аварийное выключение Ндп. Аварийное отключение ГТД D. Notausschaltung Е. Emergency shutdown F. Arrêt urgent… … Словарь-справочник терминов нормативно-технической документации
The illustration shows a typical operation of a variable geometry exhaust nozzle. The nozzle is fully open at start up and remains in the same position till throttle is advanced to about 65% when it is fully closed. The nozzle remains fully closed until beyond 100% RPM and until minimum afterburner is selected, when it takes up an intermediate position between the maximum and the minimum. It opens up fully when throttle is just short of fully open position and remains so until the maximum afterburner position. The same sequence is followed when throttle is brought back except that the nozzle opens up to fully open position at about 60% RPM instead of 65% as was the case when throttle was being advanced.