| 摘要 |
A device is shown for modulating the thrust output of a gas turbine engine without the necessity of varying the speed of said engine. The device includes means for bypassing a portion of the compressor discharge air to a manifold surrounding the engine tail pipe, and, as required, to the turbine cooling flowpath for the purpose of transiently augmenting turbine cooling flow. The manifold is provided with a plurality of swirl inducing nozzles having inlets in fluidic flow cooperation with the manifold and outlets in fluidic flow cooperation with the tail pipe such that bypass flow is provided to the tail pipe in such a manner as to induce swirl within the main gas stream thereby significantly increasing tail pipe pressure losses and thus reducing thrust output of the engine. Engine speed may be maintained during operation of this device and delay time between increased thrust demand and actual thrust output are thereby lessened.
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