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.
Pressure Forces on Variable Conical Nozzles
A Theoretical Study of Pressure and Turning Moment Distribution on Turbojet Engine Reheat Systems
Aircraft Engineering and Aerospace Technology ; 33 , 4 ; 100-102
1961-04-01
3 pages
Article (Journal)
Electronic Resource
English
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