Beggar - A Store Separation Predictive Tool

Rizk, Magdi; Ellison, Steven; Prewitt, Nathan C.

doi:10.2514/6.2002-3190

Cited by 35 publications

(3 citation statements)

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“…Chen et al [7] based on the contact dynamics between the suspension and the guide rail, established a finite element simulation analysis model of the airborne missile rail launch process and conducted in-depth research on the safety of the launch process. With the rapid development of computational fluid technology, many scholars [8][9][10][11][12][13] use CFD calculation methods to study the separation safety of aircraft missiles. However, the issue of the separation of the machine that is launched horizontally backwards from the tail of a large transport aircraft has not yet been published.…”

Section: Introductionmentioning

confidence: 99%

Horizontal Backward Launch Dynamics Modeling and Analysis

Zhao

Jiang

Wei

et al. 2019

International Journal of Aerospace Engineering

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Fighters’ air strikes play a vital role in modern warfare. But, with the development of fighters, the amount of bombs will inevitably become a major disadvantage due to the limitations of the invisible design and other functions, so a combination of the old model bombers and the advanced fifth-generation fighters has been proposed. This paper takes the aircraft missile horizontal backward launch system as the research object; firstly, the finite element model of the missile’s off-track is established, and the simulation calculation under the fixed platform is tested to verify the correctness of the finite element model. Meanwhile, the simulation parameters of the initial trajectory are obtained. Then, by establishing the separation model of the machine under the open state of the aircraft’s rear launcher, the variation of the flow field during the separation process of the missile is analyzed, and the variation of the force and the attitude of the missile is studied. It is found that the pitching motion of the missile is greatly affected by the initial pitch angle, it is always in the heading state during the whole separation process, and the yaw motion is not obvious.

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Section: Introductionmentioning

confidence: 99%

Horizontal Backward Launch Dynamics Modeling and Analysis

Zhao

Jiang

Wei

et al. 2019

International Journal of Aerospace Engineering

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“…[1,2] Beggar has a unique, user-friendly grid assembly process that utilizes the latest developments in overset grid technology. In Beggar, the flow solver is tightly coupled with a multiple degree-of-freedom (6+DOF) algorithm.…”

Section: Introductionmentioning

confidence: 99%

Applied Computational Fluid Dynamics in Support of Aircraft/Store Compatibility and Weapons Integration

Keen

2006

2006 HPCMP Users Group Conference (HPCMP-UGC'06)

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The Air Force SEEK EAGLE Office (AFSEO), Eglin Air Force Base (AFB), FL, is the United States Air Force (USAF) authority for weapons certification efforts. AFSEO performs test and evaluation for aircraft/store compatibility certification.Computational Fluid Dynamics (CFD) is employed to support this process. Determining the flow about an aircraft/store combination may be extremely difficult.Complicated geometry features such as pylons, launchers, grid fins, and internal weapons bays create severe aerothermodynamic and acoustic environments which are challenging to simulate numerically.Rapidly and accurately modeling the trajectory of store separation in a high-volume simulation environment presents an additional challenge. The USAF requirement for numerous, simultaneous and quickreaction solutions for a wide variety of stores and aircraft can only be accomplished through application of parallel high-performance computing resources that meet the significant computational and memory demands associated with the certification computational environment.Before operational use, all aircraft/store configurations must be certified for safe loading, carriage, and jettison/release. AFSEO provides flight certification recommendations which are based on combinations of engineering analysis, ground, and flight testing. Engineering analyses is provided by disciplines in carriage loads, store separations, flutter, ballistics, stability and control, and electromagnetic compatibility and interference.The AFSEO Computational Aeromechanics Team (CAT) provides time-critical CFD support for engineering analyses to optimize ground and flight testing. This contribution takes the form of carriage aerodynamic loads, store separation predictions, and visualized flow field physics. The knowledge created reduces risk, lowers cost, and speeds the fielding of new weapons. This paper discusses four of the most recently applied AFSEO CFD tasks related to specific aircraft/store investigations and certifications.

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“…[2][3][4] Typically in this case the store is significantly smaller and lighter than the parent body, and as such has little aerodynamic influence on it. In contrast, this work examines a configuration where the two bodies are similar in size and mass.…”

Section: Introductionmentioning

confidence: 99%

CFD Approaches for Simulation of Wing-Body Stage Separation

Buning

Gomez

Scallion

2004

22nd Applied Aerodynamics Conference and Exhibit

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A collection of computational fluid dynamics tools and techniques are being developed and tested for application to stage separation and abort simulation for next-generation launch vehicles. In this work, an overset grid Navier-Stokes flow solver has been enhanced and demonstrated on a matrix of proximity cases and on a dynamic separation simulation of a belly-to-belly wing-body configuration. Steady cases show excellent agreement between Navier-Stokes results, Cartesian grid Euler solutions, and wind tunnel data at Mach 3. Good agreement has been obtained between Navier-Stokes, Euler, and wind tunnel results at Mach 6. An analysis of a dynamic separation at Mach 3 demonstrates that unsteady aerodynamic effects are not important for this scenario. Results provide an illustration of the relative applicability of Euler and Navier-Stokes methods to these types of problems.

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Beggar - A Store Separation Predictive Tool

Cited by 35 publications

References 0 publications

Horizontal Backward Launch Dynamics Modeling and Analysis

Horizontal Backward Launch Dynamics Modeling and Analysis

Applied Computational Fluid Dynamics in Support of Aircraft/Store Compatibility and Weapons Integration

CFD Approaches for Simulation of Wing-Body Stage Separation

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