Aiaa 963392 high angle of attack missile aerodynamics. Missile aerodynamics download ebook pdf, epub, tuebl, mobi. The inviscid fluxes are linearized and split for upwind. High angle of attack aerodynamic predictions using missile. Multimode electric actuator dynamic modelling for missile. Maneuver description in order to gain appreciation for some of the problems involving reaction jet control and its blending with traditional aerodynamic control, a high angle of attack high alpha maneuver was chosen as test scenario.
Integration of grid fins for the optimal design of missile. Over the course of several years, there have been various approaches to the autopilot design of the agile turn in order to solve these. The present status and the future of missile aerodynamics. Finally, the conclusions are summarized in section vi. Modelling of the aerodynamic effects of projectiles flying. Shereda electe highspeed aeroperformance branch julo 9 198t1 aeromechanics division christian e. American institute of aeronautics and astronautics 12700 sunrise valley drive, suite 200 reston, va 201915807 703. However, the definition of the angle of attack is based on the wind tunnel environment as the angle between the chord line and the wind velocity vector, which has the same direction as the uniform flow along the wind tunnel walls.
This flow may be of an ordered nature, forming vortices, or random, such as encountered in wing stall. High angle of attack missile aerodynamics p c dexter, bsc, phd, ceng, mraes proceedings of the institution of mechanical engineers, part g. Aerodynamic pitch control design for reversal of missiles. Aerodynamic characteristics of cruciform missiles at high angles of attack article pdf available february 1987 with 426 reads how we measure reads. Discrete vortex theory was examined as a method which could be modified, based on experimental data, and used to predict the aerodynamic character. High angle of attack aerodynamic predictions using missile datcom eric j. Browse other questions tagged aerodynamics angleofattack or ask your own question. Discrete vortex theory was examined as a method which could be modified, based on experimental data, and used to predict the aerodynamic characteristics of missiles to greater accuracy. Missile configurations for angles of attack to 180 degrees bernard f. Highangleofattack yawing moment asymmetry of the x31. Closed coupled canardwing configurations at high angles of attack at subsonic flows 41 2. Ask a question about aircraft design and technology, space travel, aerodynamics, aviation history, astronomy, or other subjects related to aerospace engineering.
When at high angle of attack the boundary layer tends to. Prediction of sparrow missile aerodynamic characteristics with a nonlinear engineering level missile prediction. The proposed design scheme is tested on aerodynamic data available in. The last part, chapters 611, address more specific configuration aerodynamics issues, including subsonic and transonic aerodynamics, highlift systems, high angle of attack flight, and supersonic and hypersonic configuration aerodynamics. A summary of the forebody highangleofattack aerodynamics research on the f18 and the x29a aircraft lisa j. Przirembel rutgers, the state university of new jersey e. The aerodynamics of aircraft at high angles of attack is a subject which is being pursued diligently, because the modern agile fighter aircraft and many of the current generation of missiles must perform well at very high incidence, near and beyond stall. The high angle of attack data was analyzed to deduce the vortex shedding location, the vortex strength, and the vortex paths in the wake. A major influence in the aerodynamics of missiles is the significant amount of separated flow encountered for most flight conditions. The missile coordinate frame m frame and a frame parallel to the m frame were used for aerodynamics to allow convenient simulation of either the ascent phase of flight or a tumbling reentry. A sliding mode missile pitch autopilot synthesis for high.
Army aviation and missile research development and engineering center, redstone arsenal, al, 35898 the usaf missile datcom is an industry standard tool used for predicting the aerodynamics of conventional. Mountain view, ca atmospheric flight mechanics conference july 29 31, 1996 san diego, ca for permission to copy or republish, contact the owner named on the first page. High angle of attack missile aerodynamics including rotational rates program m3hax, daniel j. The high angle of attack d3ta was analyzed to deduce the vortex shedding location, the vortex strength, and the vortex paths in the wake. High angleofattack hypersonic aerodynamics article pdf available in journal of spacecraft and rockets 51. Some efforts have been made in this area related to unsteady aerodynamics by solving navierstokes equation with and without turbulence models. High angle of attack missile aerodynamics at mach numbers. Pdf high angle of attack aerodynamics sravankumar kota. The axial force on the grid fin missile configuration was about 0. The distinguishing features of flows at high angles of attack are caused by the generation of free shear layers at sharp leading edges, by separation of the viscous layers from the surfaces of wings and bodies and by the flow in the wakes of the wings and bodies. High angle of attack missile aerodynamics including rotational rates program m3hax d.
Dillenius available as aiaa paper 963392 pdf file, 273 kb. Fisher nasa dryden flight research facility abstract highangleofattack aerodynamic studies have been conducted on both the f18 high alpha research vehicle harv and the x29a aircraft. Agile missile autopilot design for high angle of attack maneuvering with aerodynamic uncertainty yueyue ma, shengjing tang, jie guo, and yao zhang school of aerospace engineering, beijing institute of technology, beijing 81, china the paper proposes a new autopilot design for agile missiles. The strength of the proposed design scheme is that no third control mechanism such as thrust vectoring is required for the missile control even in the high angle of attack domain. Full text of turbulence effects on the high angle of attack aerodynamics of a vertically launched missile. In the prior art the aerodynamics related to these elements are not known and their effects were ignored. Effect of lex at high angles of attack at subsonic flow 41 2.
Drag for large variation in angle of attack 0 aerodynamics2d. Pdf aerodynamic characteristics of cruciform missiles at. This slowed the highangleofattack envelope expansion and resulted in maneuver restrictions. Full text of turbulence effects on the high angle of. High angleofattack missile control system for aerodynamically controlled missiles. Cfd applications and validations in aerodynamic design and. Nonsteady aerodynamics at high angles of attack on slender configurations 52 x. The angle of attack is an important parameter in most threedimensional aerodynamic models of rotating wind turbines. The present volume discusses the development history of tactical missile airframes, aerodynamic considerations for autopilot design, a systematic method for tactical missile design, the character and reduction of missile observability by radar, the visualization of high angleofattack flow phenomena, and the behavior of low aspect ratio wings at high angles of attack. Near stall, aircraft lift coefficients are nonlinear with respect to parameters such as angle of attack and airspeed. At high angles of attack the vortices of the body leeside flow may become unpredictably asymmetric. Aviation stack exchange is a question and answer site for aircraft pilots, mechanics, and enthusiasts. The aerodynamics of high angle of attack flight presents a number of challenges to autonomous uas.
Comparisons to independent experimental data are presented to demonstrate the unique qualities of the code. Agile missile autopilot design for high angle of attack. Army aviation and missile command in particular has performed extensive research on various grid n con gurations 14, including a suite of grid n performance prediction codes that was developed for the u. Army aviation and missile command by burkhalter in the mid 1990s 911. The new methodology used to extend the prediction program to 90 angle of attack and to include rotational rate and nonuniform effects is described. The missile configuration chosen as an example is a cylinder with fixed fins and a nose cone. Description of flows at high angles of attack springerlink. Aerodynamics mechanics of flightscience tracer bullet. Airfoils at high angle of attack i need to know the lift and drag of a symmetric airfoil as a function.
Finite difference fd, finite volume fv and finite element fe methods are currently in use. Lateral handling issues such as asymmetric wing stall and wing rock also pose challenges at high angles of attack. High angle of attack missile aerodynamics p c dexter, 1993. Aerodynamics of finned missiles at high angle of attack. Description of the geometry missile has been designed by using catiav5 and the implementation of grid fins with the missile carried out carefully i baseline lattice grid fin, ii coarse lattice grid fin, iii afit lattice grid fin. Aerodynamic sensing for a fixed wing uas operating at high. High angle of attack missile aerodynamics at mach numbers 0.
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