Improvements In Pitch Damping For The Aeroprediction Code With Particular Emphasis On Flare Configurations
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Improvements In Pitch Damping For The Aeroprediction Code With Particular Emphasis On Flare Configurations
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Author : Frankie Gale Moore
language : en
Publisher:
Release Date : 2000
Improvements In Pitch Damping For The Aeroprediction Code With Particular Emphasis On Flare Configurations written by Frankie Gale Moore and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Aerodynamics categories.
New capability has been added to the NSWC aeroprediction code to allow aerodynamics to be predicted for Mach numbers up to 20 for configurations with flares. This new capability includes extending the static aerodynamic predictions for Mach numbers less than 1.2, improving the body alone pitch damping for Mach numbers above 2.0, and developing a new capability for pitch damping of flared configurations at Mach numbers up to 20. This new capability for flared configurations was validated for several different configurations in the Mach number range of 2 to 8.8. In general, pitch damping predictions of the improved capability was within 20 percent of either experimental data or computational fluid dynamics calculations. This accuracy level is believed to be quite adequate for dynamic derivatives in the preliminary design stage. These new additions to the aeroprediction code will be transitioned to users as part of the 2002 version of the code (APO2).
Dossier Constitu Par Des Extraits De Lettres De Pr Tres
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Author :
language : en
Publisher:
Release Date :
Dossier Constitu Par Des Extraits De Lettres De Pr Tres written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
The 2002 Version Of The Aeroprediction Code
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Author : Frankie Gale Moore
language : en
Publisher:
Release Date : 2002
The 2002 Version Of The Aeroprediction Code written by Frankie Gale Moore and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Aerodynamics categories.
A new version of the aeroprediction code (APC), the AP02, has been developed to address the requirements arising from advanced weapon concepts. The AP02 was formed by adding significant new technology and several productivity improvements to the previous version of the APC, the AP98. New technology added included 6 and 8 fin aerodynamics, improved nonlinear aerodynamics, improved pitch damping predictions, improved power-on base drag estimates, base-bleed effect on base drag estimation, improved axial force of nonaxisymmetric bodies and trailing-edge flap capability. Other improvements and productivity enhancements include an aerodynamic smoother, ballistic and three degree-of-freedom simulation modules as well as refinements for the pre- and post-processor for inputs and outputs of the AP02. Comparison of the predicted aerodynamics of the AP02 to AP98 and experimental data showed the AP02 to be slightly better than the AP98 in most cases that both codes would handle. However, due to the additional new technology incorporated into the AP02, many new options are available in the AP02 that are not available in the AP98. Therefore, the AP02 is more robust and, on average, is slightly more accurate than the AP98 in predicting aerodynamics of weapons.
Parametric Fin Body And Fin Plate Database For A Series Of 12 Missile Fins
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Author : Jerry M. Allen
language : en
Publisher:
Release Date : 2001
Parametric Fin Body And Fin Plate Database For A Series Of 12 Missile Fins written by Jerry M. Allen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Aerodynamic measurements categories.
A cooperative experimental investigation has been performed to obtain a systematic fin-body and fin-plate database for series of 12 missile fins. These data are intended to complement and extend the information contained in the Triservice missile project and to provide a systematic set of experimental data from which fin-body interference factors can be derived. Data were obtained with the fins mounted on both an axisymmetric body and on a flat plate that was used to simulate fin-alone measurements. The experiments were conducted at Mach numbers from 0.60 to 3.95; fin deflection angles of 0°, 10° , and -10° ; and angles of attack up to 30° on the body and up to 95° on the flat plate. The data were obtained from three-component balances attached to the fins and a six-component balance located in the axisymmetric body. The data obtained in this project are documented in tabular form in this report. In addition, selected data are presented in graphical form to illustrate the effects of the test variables.
39th Aiaa Aerospace Sciences Meeting And Exhibit
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Author :
language : en
Publisher:
Release Date : 2001
39th Aiaa Aerospace Sciences Meeting And 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 2001 with Aeronautics categories.
Aiaa 82 0250 Aiaa 82 0300
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Author :
language : en
Publisher:
Release Date : 1982
Aiaa 82 0250 Aiaa 82 0300 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Aeronautics categories.
International Aerospace Abstracts
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Author :
language : en
Publisher:
Release Date : 1998
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 1998 with Aeronautics categories.
The 2009 Version Of The Aeroprediction Code The Ap09
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Author :
language : en
Publisher:
Release Date : 2008
The 2009 Version Of The Aeroprediction Code The Ap09 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
The AP05 code was evaluated when applied to configurations with boattails. Results of the evaluation indicated the AP05 predictions for normal force, center of pressure, pitch and roll damping moments needed improvement. As a result new and improved methods were developed and incorporated into the AP05 to be released as the AP09. Improvements include body alone lift characteristics for Mach numbers less than 2, low angle of attack improvements for roll and pitch damping for configurations with long boattails, incorporation of an improved boundary layer displacement model and refinement of several other existing methods. In addition, new methods were developed to predict nonlinear roll and pitch damping. Comparing the new and improved methods to existing experimental data indicated significant improvements in roll and pitch damping, normal force and center of pressure predictions compared to the AP05. However, validation of the AP09 code was not as complete as desired due to limited generic nonlinear roll and pitch damping data. Also, most of the available nonlinear dynamic derivative data has larger than desired accuracy boundaries due to model sting and wind tunnel wall interference issues. Weapons affected most by the new AP09 methodology are mortars, low drag bombs and projectiles in that order. However, the nonlinear dynamic derivative predictions affect all weapons. The AP09 is thus the most accurate and robust of the Aeroprediction Codes to date.
Semiempirical Prediction Of Pitch Damping Moments For Configurations With Flares
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Author : F. G. Moore
language : en
Publisher:
Release Date : 2001
Semiempirical Prediction Of Pitch Damping Moments For Configurations With Flares written by F. G. Moore and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
The 2002 Version Of The Aeroprediction Code Part 1 Summary Of New Theoretical Methodology
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Author : Frank G. Moore
language : en
Publisher:
Release Date : 2002-03-01
The 2002 Version Of The Aeroprediction Code Part 1 Summary Of New Theoretical Methodology written by Frank G. Moore and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-03-01 with categories.
A new version of the aeroprediction code (APC), the AP02, has been developed to address the requirements arising from advanced weapon concepts. The AP02 was formed by adding significant new technology and several productivity improvements to the previous version of the APC, the AP98. New technology added included 6 and 8 fin aerodynamics, improved nonlinear aerodynamics, improved pitch damping predictions, improved power-on base drag estimates, base-bleed effect on base drag estimation, improved axial force of nonaxisymmetric bodies and trailing-edge flap capability. Other improvements and productivity enhancements include an aerodynamic smoother, ballistic and three degree-of- freedom simulation modules as well as refinements for the pre- and post- processor for inputs and outputs of the AP02. Comparison of the predicted aerodynamics of the AP02 to AP98 and experimental data showed the AP02 to be slightly better than the AP98 in most cases that both codes would handle. However, due to the additional new technology incorporated into the AP02, many new options are available in the AP02 that are not available in the AP98. Therefore, the AP02 is more robust and, on average, is slightly more accurate than the AP98 in predicting aerodynamics of weapons.