Improvements to the Solid Performance Program (SPP)

Coats, D.; Dunn, S.; French, Jonathan

doi:10.2514/6.2003-4504

Cited by 18 publications

(10 citation statements)

References 3 publications

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“…There have been numerous papers on the subject covering both experimental observations and modeling. 4,30,31,32,33,40,41,45,46,49,50,51,52,53,59,60,61,66,68,71,72,73 The details of this work is well beyond the scope of this report. Some important conclusions and comments about non-linear combustion instability can be made.…”

Section: E Non-linear Effectsmentioning

confidence: 99%

“…These curves were calculated using the Standard Performance Prediction/Standard Stability Program (SPP/SSP) code developed under both Air Force and Navy sponsorship and recently improved to predict non-linear motor behavior. 47,48,49,50,51 The inputs to this program include complete motor geometry and detailed propellant properties, including the propellant response function. The program uses a grain design and ballistic code to provide inputs to the stability module.…”

Section: Motor Stabilitymentioning

confidence: 99%

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Lessons Learned In Solid Rocket Combustion Instability

Blomshield¹

2007

43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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Over the last 60 years, a considerable amount of time and money has been spent improving our understanding of combustion instability in solid rocket propulsion systems. Over this period, significant knowledge has been accumulated that can influence the acoustic stability of solid propulsive systems. Unfortunately, many of these lessons learned about combustion instability remain the knowledge of a select few in government and industry who work with combustion instability on a daily basis. This paper attempts to organize many of these "rules of thumb" that propellant formulators and motor designers need to be aware of in order to minimize the chances of combustion instability. In addition, several mathematical relationships are presented which can be used to predict the frequency of potential acoustic modes and determine resultant thrust oscillations produced by acoustic oscillations. Also included are some key fundamental equations which can be used to gain insight into combustion instability in rocket motor systems and there is a short section on motor instrumentation. This paper is not an attempt to be an exhaustive study into combustion instability, but rather, will attempt to list in a clear fashion some of the more important lessons learned and empirical observations of solid propellant combustion instability. This paper emphasizes composite propellants, but many observations apply to double base and composite modified double base propellants, as well.

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Section: E Non-linear Effectsmentioning

confidence: 99%

Section: Motor Stabilitymentioning

confidence: 99%

Lessons Learned In Solid Rocket Combustion Instability

Blomshield¹

2007

43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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“…In this subsection, we present an application of FOM to the simulation of solid rocket motors. Our test performs a nearly complete burn (95% burn) of an attitude control motor (ACM) rocket, courtesy of Aerojet Inc. Our test assumed uniform speed, similar to commercial analysis tools for solid rocket motors, such as SPP'02 [26]. In reality, the regression rate of a solid rocket is fairly uniform except during initial ignition transients, so this setting is fairly representative.…”

Section: Application To Solid Rocket Motorsmentioning

confidence: 99%

Face offsetting: A unified approach for explicit moving interfaces

Jiao

2007

Journal of Computational Physics

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Dynamic moving interfaces are central to many scientific, engineering, and graphics applications. In this paper, we introduce a novel method for moving surface meshes, called the face offsetting method, based on a generalized Huygens' principle. Our method operates directly on a Lagrangian surface mesh, without requiring an Eulerian volume mesh. Unlike traditional Lagrangian methods, which move each vertex directly along an approximate normal or user-specified direction, our method propagates faces and then reconstructs vertices through an eigenvalue analysis locally at each vertex to resolve normal and tangential motion of the interface simultaneously. The method also includes techniques for ensuring the integrity of the surface as it evolves. Face offsetting provides a unified framework for various dynamic interface problems and delivers accurate physical solutions even in the presence of singularities and large curvatures. We present the theoretical foundation of our method, and also demonstrate its accuracy, efficiency, and flexibility for a number of benchmark problems and a real-world application.

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“…This code can also be useful for risk analyses when the grain has a crack and/or air bubble in it. In some previous researches, the methods of 3D burning surface simulation have been proposed in some previous researches conducted in America [53][54][55] , France 3) , China 56) and Turkey 2,57) . Ref 53 shows that the code can treat not only 3D ballistics analyses but also deal with several options such as for segmented motors, for dual propellant motors, for defining case insulation and for exporting the burning surface data for CFD.…”

Section: Internal Ballistics Predictionmentioning

confidence: 99%

Advanced Computer Science on Internal Ballistics of Solid Rocket Motors

Shimada

Kato

Sekino

et al. 2010

AEROSPACE TECHNOLOGY JAPAN

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In this paper, described is the development of a numerical simulation system, what we call "Advanced Computer Science on SRM Internal Ballistics (ACSSIB)", for the purpose of improvement of performance and reliability of solid rocket motors (SRM). The ACSSIB system is consisting of a casting simulation code of solid propellant slurry, correlation database of local burning-rate of cured propellant in terms of local slurry flow characteristics, and a numerical code for the internal ballistics of SRM, as well as relevant hardware. This paper describes mainly the objectives, the contents of this R&D, and the output of the fiscal year of 2008.

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Improvements to the Solid Performance Program (SPP)

Cited by 18 publications

References 3 publications

Lessons Learned In Solid Rocket Combustion Instability

Lessons Learned In Solid Rocket Combustion Instability

Face offsetting: A unified approach for explicit moving interfaces

Advanced Computer Science on Internal Ballistics of Solid Rocket Motors

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