REHEAT systems for turbo-jet engines employ variable area convergent nozzles, and modern developments have produced nozzles made up of a series of flaps or fingers, as shown in fig. 1. These flaps have to be supported against the internal gas load to maintain a given area. The turning moment on each flap is usually balanced by a single element through a mechanical linkage; the element may take the form of a rod in tension or a shaft in torsion. This note provides a theoretical study of the nature of this load. In addition, the concept of frictional forces is introduced and a method developed for calculating the forces prevailing in flight, provided that two constants are determined from sea level test results.


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    Title :

    Pressure Forces on Variable Conical Nozzles


    Subtitle :

    A Theoretical Study of Pressure and Turning Moment Distribution on Turbojet Engine Reheat Systems


    Contributors:
    Woods, W.A. (author)

    Published in:

    Publication date :

    1961-04-01


    Size :

    3 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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