An Experimental Modeling Study Of Jet Attachment During Counterflow Thrust Vectoring
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An Experimental Modeling Study Of Jet Attachment During Counterflow Thrust Vectoring
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-17
An Experimental Modeling Study Of Jet Attachment During Counterflow Thrust Vectoring written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-17 with categories.
Recent studies have shown the applicability of vectoring rectangular jets using asymmetrically applied counterflow in the presence of a short collar. This novel concept has applications in the aerospace industry where counterflow can be used to vector the thrust of a jet's exhaust, shortening take-off and landing distances and enhancing in-flight maneuverability of the aircraft. Counterflow thrust vectoring, 'CFTV' is desirable due to its fast time response, low thrust loss, and absence of moving parts. However, implementation of a CFTV system is only possible if bistable jet attachment can be prevented. This can be achieved by properly designing the geometry of the collar. An analytical model is developed herein to predict the conditions under which a two-dimensional jet will attach to an offset curved wall. Results from this model are then compared with experiment; for various jet exit Mach numbers, collar offset distances, and radii of curvature. Their excellent correlation permits use of the model as a tool for designing a CFTV system. Strykowski, Paul J. Langley Research Center THRUST VECTOR CONTROL; COUNTERFLOW; MATHEMATICAL MODELS; AIRCRAFT ENGINES; JET FLOW; SHEAR LAYERS; DATA ACQUISITION; MASS FLOW; FREE JETS; AERODYNAMIC DRAG; REATTACHED FLOW; MACH NUMBER; EXPERIMENTATION; DATA CORRELATION...
An Experimental Investigation Of Active Control Of Thrust Vectoring Nozzle Flow Fields
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Author :
language : en
Publisher:
Release Date : 1994
An Experimental Investigation Of Active Control Of Thrust Vectoring Nozzle Flow Fields written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Fluidic thrust vector control is examined in a supersonic rectangular jet having a 4:1 aspect ratio. Experiments conducted at a Mach number of 2 reveal that the thrust vector angle of the jet can be continuously varied by up to at least 16 deg by applying a counterflowing stream to one of the primary jet shear layers. A technique using counterflow eliminates the bistable response known to plague fluidic elements and is shown to be effective in both hot and cold supersonic jets. Results are presented for jet stagnation temperatures between 300 deg K and 670 deg K. Measurements indicate that the thrust vector control is both efficient as well as a linear function of the static pressure developed in the counterflowing stream. The typical power required to vector the jet at 16 degrees was estimated to be less than 1% of the power developed in the primary jet. Thrust vector control employing counterflow has several advantages over current technologies, the most important of which is the elimination of movable control surfaces which add considerable weight to the aircraft. Thrust vectoring nozzle, Active control.
An Experimental Investigation Of Thrust Vectoring Two Dimensional Covergent Divergent Nozzles Installed In A Twin Engine Fighter Model At High Angles Of Attack
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Author : Francis J. Capone
language : en
Publisher:
Release Date : 1990
An Experimental Investigation Of Thrust Vectoring Two Dimensional Covergent Divergent Nozzles Installed In A Twin Engine Fighter Model At High Angles Of Attack written by Francis J. Capone and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
Applied Mechanics Reviews
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Author :
language : en
Publisher:
Release Date : 1997
Applied Mechanics Reviews written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Mechanics, Applied categories.
Monthly Catalog Of United States Government Publications
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Author :
language : en
Publisher:
Release Date : 1999
Monthly Catalog Of United States Government Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Government publications categories.
Experimental Study Of Axisymmetric Confined Jet Thrust Vector Control Nozzle Performance And Behavior
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Author : Peter G. Lambert (CAPT, USAF.)
language : en
Publisher:
Release Date : 1986
Experimental Study Of Axisymmetric Confined Jet Thrust Vector Control Nozzle Performance And Behavior written by Peter G. Lambert (CAPT, USAF.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
International Aerospace Abstracts
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Author :
language : en
Publisher:
Release Date : 1999
International Aerospace Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Aeronautics categories.
34th Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit
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Author :
language : en
Publisher:
Release Date : 1998
34th Aiaa Asme Sae Asee Joint Propulsion Conference Exhibit written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Airplanes categories.
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 2006
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Dissertations, Academic categories.
Government Reports Announcements Index
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Author :
language : en
Publisher:
Release Date : 1996
Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Science categories.
