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Transonic Wind Tunnel Investigation Of Limit Cycle Oscillations On Fighter Type Wings
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Book Synopsis Transonic Wind Tunnel Investigation of Limit Cycle Oscillations on Fighter Type Wings by : Atlee M. Cunningham
Download or read book Transonic Wind Tunnel Investigation of Limit Cycle Oscillations on Fighter Type Wings written by Atlee M. Cunningham and published by . This book was released on 1992 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wind tunnel investigation was conducted to investigate the unsteady aerodynamic aspects of transonic Limit Cycle Oscillations (LCO) on fighter type aircraft wings. This investigation is a cooperative effort of General Dynamics (Fort Worth) and the National Aerospace Laboratory (NLR) of the Netherlands which is funded by the U.S. Air Force and the Dutch Ministry of Defense. Two tests were planned and the first test, conducted during September 1991, was concerned with a wing body configuration with wing stores and was restricted to incidences below 10 deg. The second test, planned for March 1992, will be for a simple wing-strake geometry and will cover incidences up to at least 30 deg. This paper presents results from the first test with the objective to obtain unsteady pressures and forces necessary for identifying the aerodynamic nature of transonic LCO which is currently encountered on many fighter configurations. The wing panel was oscillated in pitch at amplitudes and frequencies typical of LCO for flow conditions in which significant shock-induced separation is encountered. Unsteady pressure data were obtained for the wing panel in terms of both harmonic components and time-histories to highlight the nonlinearities. Unsteady forces and moments measured on the wing panel as well as on each wing store were also obtained to indicate the level of contribution of each element to the overall unsteady wing loads for pitching motions.
Book Synopsis Development of a Method to Predict Transonic Limit Cycle Oscillation Characteristics of Fighter Aircraft by : J. J. Meijer
Download or read book Development of a Method to Predict Transonic Limit Cycle Oscillation Characteristics of Fighter Aircraft written by J. J. Meijer and published by . This book was released on 1992 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis of steady wind tunnel data, obtained for a fighter type aircraft, has indicated that shock-induced and trailing-edge separation plays a dominant role in the development of Limit Cycle Oscillations (LCO) at transonic speeds. On this basis, a semi-empirical LCO prediction method is being developed which makes use of such steady wind tunnel data. The preliminary method has been applied to several configurations and has correctly identified those which have encountered LCO. The method has the potential for application early in the design process of new aircraft to determine and understand these non-linear aeroelastic characteristics. The method is still being evaluated and upgrading and refinements are expected from unsteady wind tunnel force and pressure measurements to be obtained from oscillating models as part of an extensive investigation into the aerodynamic nature of LCO. The method will be described in its present form and results of the latest predictions will be compared with flight test trends and used to further assess various parametric effects.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Prediction Method of Transonic Limit Cycle Oscillation Characteristics of Fighter Aircraft Using Adapted Steady Wind Tunnel Data by : Jos J. Meijer
Download or read book A Prediction Method of Transonic Limit Cycle Oscillation Characteristics of Fighter Aircraft Using Adapted Steady Wind Tunnel Data written by Jos J. Meijer and published by . This book was released on 1995 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Limit Cycle Oscillations and Nonlinear Aeroelastic Wing Response by : Earl H. Dowell
Download or read book Limit Cycle Oscillations and Nonlinear Aeroelastic Wing Response written by Earl H. Dowell and published by . This book was released on 2004 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 92-4496 to 92-4646 written by and published by . This book was released on 1992 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transonic Wind Tunnel Tests on an Oscillating Wing with External Stores by : H. Tijdeman
Download or read book Transonic Wind Tunnel Tests on an Oscillating Wing with External Stores written by H. Tijdeman and published by . This book was released on 1978 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wind-tunnel investigation was carried out on an oscillating model of the F-5 wing with and without an external store (AIM-9J missile). The store was mounted at the wing tip as well as at a pylon underneath the wing. Detailed steady and unsteady pressure distributions were measured over the wing, while on the store aerodynamic loads were obtained. In addition, wind-tunnel wall pressures were recorded. The tests covered the Mach numbers of 0.6, 0.8, 0.95, 1.0, 1.05, 1.1, 1.2 and 1.35 and oscillatory frequencies of 0.20, and 40 Hz.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AIAA Journal by : American Institute of Aeronautics and Astronautics
Download or read book AIAA Journal written by American Institute of Aeronautics and Astronautics and published by . This book was released on 2005 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP. written by and published by . This book was released on 1992 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1973 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of the Limit Cycle Oscillation Behaviour in Transonic Flow of the Goland Wing with Varying Thickness by : Norizham Abdul Razak
Download or read book Investigation of the Limit Cycle Oscillation Behaviour in Transonic Flow of the Goland Wing with Varying Thickness written by Norizham Abdul Razak and published by . This book was released on 2008 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transonic Wind-tunnel Investigation of the Effect of Control Span and Large Wing-tip Nacelles on Effectiveness of Spoiler-slot- Deflector Controls on an Unswept-wing Fighter-type Airplane by :
Download or read book Transonic Wind-tunnel Investigation of the Effect of Control Span and Large Wing-tip Nacelles on Effectiveness of Spoiler-slot- Deflector Controls on an Unswept-wing Fighter-type Airplane written by and published by . This book was released on 1960 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Generic Nonlinear Aeroelastic Method with Semi-empirical Nonlinear Unsteady Aerodynamics by : Atlee M. Cunningham
Download or read book A Generic Nonlinear Aeroelastic Method with Semi-empirical Nonlinear Unsteady Aerodynamics written by Atlee M. Cunningham and published by . This book was released on 1999 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid-structure interactions (FSI) that involve nonlinear aerodynamic forces are described which affect both aging aircraft, as well as new aircraft. Several cases are presented which contain aerodynamic non linearities that are important in the FSI process and that require different solution approaches from those taken for linear FSI problems. A time-dependent approach is presented which is based on a semi empirical nonlinear aerodynamic model that is fully coupled with the aircraft elastic equations of motion. An early version of this methodology is applied to a wide variety of Limit Cycle Oscillation (LCO) cases for a fighter configuration carrying large underwing stores. The new method is applied to three classes of problems: (1) LCO for bomber and transport type configurations; (2) LCO for a fighter wing; and (3) large amplitude buffet response of a fin subject to server wake turbulence.
Book Synopsis Transonic Wind Tunnel Tests on an Oscillating Wing with External Stores by : H. Tijdeman
Download or read book Transonic Wind Tunnel Tests on an Oscillating Wing with External Stores written by H. Tijdeman and published by . This book was released on 1979 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wind-tunnel investigation was carried out on an oscillating model of the F-5 wing with and without an external store (AIM-9J missile). The store was mounted at the wing tip as well as at a pylon underneath the wing. Detailed steady and unsteady pressure distributions were measured over the wing, while on the store aerodynamic loads were obtained. In addition, wind-tunnel wall pressures were recorded. The tests covered the Mach numbers of 0.6, 0.8, 0.95, 1.0, 1.05, 1.1, 1.2 and 1.35 and oscillatory frequencies of 0.20, and 40 Hz.
