variable nozzle

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• 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

• 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

• Variable-Turbinengeometrie-Lader — Schnittbild durch eine Francisturbine mit den verdrehbaren Leitschaufeln, der das Verfahren Variable Turbinengeometrie Lader entlehnt wurde siehe auch Turbolader mit VTG Ein Variable Turbinengeometrie Lader (VTG Lader) oder englisch Variable… …   Deutsch Wikipedia

• Variable Turbinen-Geometrie — Der variable Turbinen Geometrie Lader (VTG Lader) oder Variable Nozzle Turbocharger (VNT) ist ein Abgasturbolader, der nach dem gleichen Prinzip wie ein Wastegate Turbolader arbeitet. Er besitzt ebenfalls ein Turbinen und ein Verdichterrad, die… …   Deutsch Wikipedia

• Variable Specific Impulse Magnetoplasma Rocket — Artist s impression of several VASIMR engines propelling a craft through space The Variable Specific Impulse Magnetoplasma Rocket (VASIMR) is an electro magnetic thruster for spacecraft propulsion. It uses radio waves to ionize and heat a… …   Wikipedia

• Variable Cycle Engine — In a Variable Cycle Engine (VCE) the engine cycle is deliberately modified from that which would occur under normal circumstances.The next generation of Supersonic transport (SST) may require some form of VCE. SST engines require a high Specific… …   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

• propelling nozzle — A convergent/divergent duct in the exhaust system of a gas turbine engine, where the remaining gas energy is converted into velocity to produce thrust. In a gas turbine engine, the exit velocity of gases is subsonic at low thrust conditions only …   Aviation dictionary

• Blast nozzle — Blast Blast (bl[.a]st), n. [AS. bl[=ae]st a puff of wind, a blowing; akin to Icel. bl[=a]str, OHG. bl[=a]st, and fr. a verb akin to Icel. bl[=a]sa to blow, OHG. bl[^a]san, Goth. bl[=e]san (in comp.); all prob. from the same root as E. blow. See… …   The Collaborative International Dictionary of English

• supersonic nozzle — A convergent divergent nozzle with a variable area and profile through which the relative airflow is supersonic …   Aviation dictionary