NDLI: An engine trade study for a supersonic stovl fighter-attack aircraft, volume 1

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An engine trade study for a supersonic stovl fighter-attack aircraft, volume 1

Content Provider	NASA Technical Reports Server (NTRS)
Author	Beard, B. B. Foley, W. H.
Copyright Year	1982
Description	The best main engine for an advanced STOVL aircraft flight demonstrator was studied. The STOVL aircraft uses ejectors powered by engine bypass flow together with vectored core exhaust to achieve vertical thrust capability. Bypass flow and core flow are exhausted through separate nozzles during wingborne flight. Six near term turbofan engines were examined for suitability for this aircraft concept. Fan pressure ratio, thrust split between bypass and core flow, and total thrust level were used to compare engines. One of the six candidate engines was selected for the flight demonstrator configuration. Propulsion related to this aircraft concept was studied. A preliminary candidate for the aircraft reaction control system for hover attitude control was selected. A mathematical model of transfer of bypass thrust from ejectors to aft directed nozzle during the transition to wingborne flight was developed. An equation to predict ejector secondary air flow rate and ram drag is derived. Additional topics discussed include: nozzle area control, ejector to engine inlet reingestion, bypass/core thrust split variation, and gyroscopic behavior during hover.
File Size	2118781
Page Count	81
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19850002602
Archival Resource Key	ark:/13960/t2b90389q
Language	English
Publisher Date	1982-02-01
Access Restriction	Open
Subject Keyword	Aeronautics (general) Gas Turbines Supersonic Aircraft Ejectors Thrust Augmentation Propulsion Mathematical Models Thrust Control Jet Engines Vertical Takeoff Aircraft Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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