An Improved Method For Predicting Axial Force At High Angle Of Attack
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An Improved Method For Predicting Axial Force At High Angle Of Attack
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Author : Frankie Gale Moore
language : en
Publisher:
Release Date : 1997
An Improved Method For Predicting Axial Force At High Angle Of Attack 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 1997 with Aerodynamic load categories.
An Improved Semiempirical Method For Calculating Aerodynamics Of Missiles With Noncircular Bodies
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Author : Frankie Gale Moore
language : en
Publisher:
Release Date : 1997
An Improved Semiempirical Method For Calculating Aerodynamics Of Missiles With Noncircular Bodies 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 1997 with Aerodynamics categories.
An Improved Method For Predicting Axial Force At High Angle Of Attack
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Author : Frank G. Moore
language : en
Publisher:
Release Date : 1997-02-01
An Improved Method For Predicting Axial Force At High Angle Of Attack 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 1997-02-01 with Aerodynamic load categories.
An improved semiempirical method for axial force calculation on missile configurations has been developed. The method uses the theoretical methods currently used in the Naval Surface Warfare Center Aeroprediction Code for zero angle-of-attack (AOA) axial force computations and several wind tunnel data bases to compute changes in axial force at AOA. The method is applicable to bodies alone, wing-body, and wing-body-tail configurations for both zero and non-zero control deflections. It has been developed to allow computation for AOA to 90 deg at any Mach number. However, it has been validated against data only to Mach number of 4.6 and AOA to 40 deg for all configurations. For body alone and wing-body cases, it has been validated to 90 deg AOA. Additional test data or Navier Stokes computations would allow refinement of the improved method. The new method has been compared to several existing techniques. The method was found to be as good as or better than existing techniques, but more general than existing methods in terms of configurations and Mach numbers allowed for the method to be used.
Improved Method For Prediction Of Attainable Wing Leading Edge Thrust
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Author : Harry W. Carlson
language : en
Publisher:
Release Date : 1996
Improved Method For Prediction Of Attainable Wing Leading Edge Thrust written by Harry W. Carlson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Aerodynamics categories.
A Simplified Method For Predicting Aerodynamics Of Multi Fin Weapons
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Author : Frankie Gale Moore
language : en
Publisher:
Release Date : 1999
A Simplified Method For Predicting Aerodynamics Of Multi Fin Weapons 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 1999 with Aerodynamics categories.
The 1998 Version Of The Nswc Aeroprediction Code
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Author : Frankie Gale Moore
language : en
Publisher:
Release Date : 1998
The 1998 Version Of The Nswc 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 1998 with Aerodynamics categories.
The NSWC Aero prediction code has been extended to the roll position of 45 deg (fins in 'x' or cross roll orientation) in addition to the roll position of 0 deg (fins in '+' or plus roll orientation). It has also been extended to compute aerodynamics of nonaxisymmetric bodies based on an equivalent axisymmetric body. In addition, the nonlinear aerodynamic loads have been distributed over the body and lifting surfaces to provide a more useful tool for preliminary structural analysis. Finally, new technology was developed to improve the prediction of axial force at angle of attack (AOA). These new technologies have been integrated into the AP95 and will be transitioned to legitimate users as the AP98. To make the AP98 more user friendly, an upgraded pre- and post-processing, personal computer interface was also developed. Comparisons of the new theory have been made to both experimental data and the AP95. Comparisons of theory and experiment show the AP98 to be at least as good as the AP95 and, in general, maybe slightly better. In general, average accuracy levels of aerodynamics are +/- 10 percent on axial and normal force and +/- 4 percent of body length on center of pressure. For nonaxisymmetric body cases, accuracy can be slightly higher than these numbers, although not enough cases have been considered to make a definitive assessment. While these accuracy levels are encouraging for a semiempirical code, they could be improved upon by use of computational fluid dynamics codes or additional experimental data or both to reduce errors due to limited data bases.
Technical Digest
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Author : Naval Surface Warfare Center (U.S.). Dahlgren Division
language : en
Publisher:
Release Date : 1998
Technical Digest written by Naval Surface Warfare Center (U.S.). Dahlgren Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Naval research 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.
Nasa Technical Paper
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Author :
language : en
Publisher:
Release Date : 1992
Nasa Technical Paper written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Science categories.
Improved Aeroprediction Code
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Author : Frankie Gale Moore
language : en
Publisher:
Release Date : 1993
Improved 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 1993 with Aerodynamic heating categories.
New and improved version of the Naval Surface Warfare Center, Dahlgren Division aeroprediction code (AP93) has been developed. The new code contains new technology that allows planar aerodynamics of axisymmetric solid rocket-type weapons to be computed with engineering accurately over the entire Mach number range and for angles of attack to 30 deg. New technology developed and included in the AP93 includes; A new engineering method to compute aeroheating information at a high Mach number; Extension of the second-order shock-expansion theory to include real-gas effects, including several new pressure prediction techniques; An improved body-alone nonlinear normal-force method; New methods for computing nonlinear aerodynamics of wing alone, wing body, and body wing due to angle of attack, and wing body due to control deflection; and a new base-dmg database and improved empirical base-drag estimation technique. ... Aeroprediction code (AP93), Planar aerodynamics, High mach number.