Turbofan

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Turbofan

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A turbojet engine in which additional propulsive thrust is gained by extending a portion of the compressor or turbine blades outside the inner engine case. The extended blades propel bypass air flows along the engine axis but between the inner and outer engine casing. This air is not combusted but does provide additional thrust caused by the propulsive effect imparted to it by the extended compressor blading. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use