Accession Number : AD0163741
Title : Diverter Valve Flow Throttle.
Descriptive Note : Patent,
Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C
Personal Author(s) : Holmes,Allen B.
Report Date : 09 NOV 1971
Pagination or Media Count : 6
Abstract : The patent relates to a diverter valve flow throttle for controlling the flow of the high-velocity exhaust gases of a turbojet engine in V/STOL aircraft. In a first embodiment, the diversion is performed by a single rotating vane that blocks the flow of gases only in the fan mode. Leakage to the fan duct is impossible during the jet mode due to the high-velocity, low-pressure area developed at the opening of the duct. In a second embodiment, fluidic techniques are utilized to divert the exhaust gas flow without the use of any mechanical vanes. The frictional losses in the tailpipe due to the extremely high velocities of the exhaust stream are compensated for by a series of vents located in the tailpipe duct which admit a secondary flow of air to the main jet flow. The adjustable vents also provide constant engine speed throttling and control as an aid during conversion.
Descriptors : (*EXHAUST VALVES, *PATENTS), (*TURBOJET ENGINES, EXHAUST GASES), THROTTLING, FLUIDICS, FLUID FLOW, VENTS
Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
Jet and Gas Turbine Engines
Distribution Statement : APPROVED FOR PUBLIC RELEASE