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 afterburner noise reduction and easier starting. The variable geometry may be achieved automatically, depending on the throttle position and/or speed or by controlling it manually from the cockpit. On most aircraft, only the primary (convergent) nozzle position is controlled.

单词	variable-geometry nozzle
释义	variable-geometry nozzle 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 afterburner noise reduction and easier starting. The variable geometry may be achieved automatically, depending on the throttle position and/or speed or by controlling it manually from the cockpit. On most aircraft, only the primary (convergent) nozzle position is controlled.
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