Accession Number : ADD010776

Title :   Pressure Control System for Convergent-Divergent Exhaust Nozzle.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Mendez,J A ; Mayers,J L

Report Date : 20 Dec 1983

Pagination or Media Count : 6

Abstract : This patent discloses a system to assist flap actuation of a convergent-divergent exhaust nozzle to overcome the high air loads on the flaps, so that the nozzle flaps can be properly positioned by the actuators. The structural members of the system are operatively associated with a controlled, air-pressurized, cavity positioned in the exhaust nozzle section. Pressurized air from the cavity acts against the flaps, and helps to overcome the load required to move them. The system is useful in any exhaust nozzle, and most particularly where the exhaust nozzle is two-dimensional, i.e., rectangularly shaped.

Descriptors :   *Patents, *Actuators, *Exhaust nozzles, *Convergent divergent nozzles, *Flaps(Control surfaces), Cavities, Aerodynamic loading, Pressure measurement, Turbofan engines, Nozzle closures, Nozzle gas flow, Pressurization, Control systems, Rectangular bodies, Two dimensional, Axisymmetric

Subject Categories : Hydraulic and Pneumatic Equipment
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE