Incorporation Of Boundary Layer Heating Predictive Methodology Into Nswcdd Aeroprediction Code
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Incorporation Of Boundary Layer Heating Predictive Methodology Into Nswcdd Aeroprediction Code
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Author : Roy Mitchell McInville
language : en
Publisher:
Release Date : 1993
Incorporation Of Boundary Layer Heating Predictive Methodology Into Nswcdd Aeroprediction Code written by Roy Mitchell McInville and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Boundary layer categories.
"Methods have been incorporated into the Naval Surface Warfare Center, Dahlgren Division aeroprediction code to permit the computation of heat transfer rates and recovery temperatures as part of the high Mach number solution. A mass balance technique has been included to determine the correct boundary layer edge entropy to use along the surface of blunt bodies. Refinements were also made to the pressure prediction routines to remove discontinuities and improve overall results. Comparisons of results from the new methods with those from more advanced engineering codes, with other techniques of similar technical level of detail, and with experimental data show good agreement. These new capabilities make possible the rapid computation of three-dimensional heat transfer information for a wide range of geometric configurations and flight conditions. . Aeroprediction code, High Mach number range, Three-dimensional heat rates, Recovery temperatures, Mass balance technique, Boundary layer ."--DTIC.
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.
State Of The Art Engineering Aeroprediction Methods With Emphasis On New Semiempirical Techniques For Predicting Nonlinear Aerodynamics On Complete Missile Configurations
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Author : Frankie Gale Moore
language : en
Publisher:
Release Date : 1993
State Of The Art Engineering Aeroprediction Methods With Emphasis On New Semiempirical Techniques For Predicting Nonlinear Aerodynamics On Complete Missile 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 1993 with Aerodynamics categories.
This report discusses the pros and cons of numerical, semiempirical and empirical aeroprediction codes and lists many state-of-the-art codes in use today. It then summarizes many of the more popular approximate analytical methods used in State-of-the-Art (SOTA) semiempirical aeroprediction codes. It also summarizes some recent new nonlinear semiempirical methods that allow more accurate calculation of static aerodynamics on complete missile configurations to higher angles of attack. Results of static aerodynamic calculations on complete missile configurations compared to wind tunnel data are shown for several configurations at various flight conditions. Calculations show the new nonlinear methods being far superior to some of the former linear technology when used at angles of attack greater than about 15 degrees. Aeroprediction codes, Nonlinear semiempirical methods, State-of-the-Art (SOTA) semiempirical aeroprediction codes, Static aerodynamic calculations.
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.
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.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports 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 Aeronautics categories.
Incorporation Of Boundary Layer Heating Predictive Methodology Into Nswcdd Aeroprediction Code
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Author : Roy M. Mcinville
language : en
Publisher:
Release Date : 1993
Incorporation Of Boundary Layer Heating Predictive Methodology Into Nswcdd Aeroprediction Code written by Roy M. Mcinville and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
"Methods have been incorporated into the Naval Surface Warfare Center, Dahlgren Division aeroprediction code to permit the computation of heat transfer rates and recovery temperatures as part of the high Mach number solution. A mass balance technique has been included to determine the correct boundary layer edge entropy to use along the surface of blunt bodies. Refinements were also made to the pressure prediction routines to remove discontinuities and improve overall results. Comparisons of results from the new methods with those from more advanced engineering codes, with other techniques of similar technical level of detail, and with experimental data show good agreement. These new capabilities make possible the rapid computation of three-dimensional heat transfer information for a wide range of geometric configurations and flight conditions. . Aeroprediction code, High Mach number range, Three-dimensional heat rates, Recovery temperatures, Mass balance technique, Boundary layer ."--DTIC.
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.
6th Aiaa Asme Joint Thermophysics And Heat Transfer Conference
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Author :
language : en
Publisher:
Release Date : 1994
6th Aiaa Asme Joint Thermophysics And Heat Transfer Conference 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 Heat categories.