Structural vibration considerations for solid rocket internal ballistics modeling

Montesano, John; Greatrix, David R.; Behdinan, Kamran; Fawaz, Zouheir

doi:10.2514/6.2000-3804

Cited by 23 publications

(47 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The motor, based in large part on a similar experimental motor [15], is a smaller cylindrical-grain design with an aluminum casing and static-test steel sleeve, with a relatively large length-to-diameter ratio. The motor at the time of pulsing has a moderate port-to-throat area ratio, with a considerable propellant web thickness remaining.…”

Section: Resultsmentioning

confidence: 99%

“…Montesano et al [14] employed a finite-element approach towards the structural modeling of the given motor configuration. In the present study, a cylindrical-grain configuration allows for a simpler approach via the thick wall theory, as reported in [15]. The radial deformation dynamics of the propellant/casing/sleeve are modelled by a series of independent ring elements along the length of the motor.…”

Section: Numerical Modelmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Evaluation of the Use of Aluminum Particles for Enhancing Solid Rocket Motor Combustion Stability

Greatrix

2015

Energies

View full text Add to dashboard Cite

Abstract:The ability to predict the expected internal behaviour of a given solid-propellant rocket motor under transient conditions is important. Research towards predicting and quantifying undesirable transient axial combustion instability symptoms typically necessitates a comprehensive numerical model for internal ballistic simulation under dynamic flow and combustion conditions. On the mitigation side, one in practice sees the use of inert or reactive particles for the suppression of pressure wave development in the motor chamber flow. With the focus of the present study placed on reactive particles, a numerical internal ballistic model incorporating relevant elements, such as a transient, frequency-dependent combustion response to axial pressure wave activity above the burning propellant surface, is applied to the investigation of using aluminum particles within the central internal flow (particles whose surfaces nominally regress with time, as a function of current particle size, as they move downstream) as a means of suppressing instability-related symptoms in a cylindrical-grain motor. The results of this investigation reveal that the loading percentage and starting size of the aluminum particles have a significant influence on reducing the resulting transient pressure wave magnitude.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

Numerical Evaluation of the Use of Aluminum Particles for Enhancing Solid Rocket Motor Combustion Stability

Greatrix

2015

Energies

View full text Add to dashboard Cite

show abstract

“…The reference SRM for this investigation is a cylindrical-grain motor employing a nonaluminized AP/HTPB propellant, with characteristics, such as the solid propellant's specific heat C s , as reported by Greatrix and Harris [4]; some parameters have been updated or added for the current effort. A thin steel sleeve of 4.7-mm thickness is in place for the reference static-test simulations.…”

Section: Resultsmentioning

confidence: 99%

“…Loncaric et al [1] employed a finite-element approach towards the structural modelling of a star-grain propellant configuration. In the present study, a cylindrical-grain configuration allows for a simpler approach from thickwall theory, as reported by Greatrix and Harris [4]. The radial deformation dynamics of the propellant/casing/sleeve are modelled by a series of independent ring elements along the length of the motor.…”

Section: Methodsmentioning

confidence: 99%

Suppression of axial combustion instability in solid rocket motors

Greatrix¹

2007

WIT Transactions on Modelling and Simulation, Vol 45

View full text Add to dashboard Cite

A numerical model for the prediction of undesirable axial combustion instability symptoms in solid-propellant rocket motors is utilized in the process of demonstrating various approaches for suppressing this instability behaviour. The unsteady interior one-or two-phase flow in the motor chamber, the oscillation of the surrounding structure of the propellant and motor casing, and the corresponding transient combustion process, are all incorporated within this comprehensive model. Example numerical results are presented for a cylindricalgrain motor having differing characteristics with respect to particle loading and grain geometry (fore and aft cross-sectional area changes), in illustrating the effectiveness of the particular suppression technique being applied.

show abstract

“…Montesano et al [4] employed a finite-element approach towards the structural modeling of the given motor configuration. In the present study, a cylindrical-grain configuration allows for a simpler approach via thick-wall theory, as reported in [5,6]. The radial deformation dynamics of the propellant/casing are modeled by a series of independent ring elements along the length of the motor.…”

Section: Numerical Modelmentioning

confidence: 99%

Scale Effects on Quasi-Steady Solid Rocket Internal Ballistic Behaviour

Greatrix

2010

Energies

View full text Add to dashboard Cite

Abstract:The ability to predict with some accuracy a given solid rocket motor's performance before undertaking one or several costly experimental test firings is important. On the numerical prediction side, as various component models evolve, their incorporation into an overall internal ballistics simulation program allows for new motor firing simulations to take place, which in turn allows for updated comparisons to experimental firing data. In the present investigation, utilizing an updated simulation program, the focus is on quasi-steady performance analysis and scale effects (influence of motor size). The predicted effects of negative/positive erosive burning and propellant/casing deflection, as tied to motor size, on a reference cylindrical-grain motor's internal ballistics, are included in this evaluation. Propellant deflection has only a minor influence on the reference motor's internal ballistics, regardless of motor size. Erosive burning, on the other hand, is distinctly affected by motor scale.Keywords: solid rocket motor internal ballistics; scale effects; quasi-steady operation

show abstract

Structural vibration considerations for solid rocket internal ballistics modeling

Cited by 23 publications

References 9 publications

Numerical Evaluation of the Use of Aluminum Particles for Enhancing Solid Rocket Motor Combustion Stability

Numerical Evaluation of the Use of Aluminum Particles for Enhancing Solid Rocket Motor Combustion Stability

Suppression of axial combustion instability in solid rocket motors

Scale Effects on Quasi-Steady Solid Rocket Internal Ballistic Behaviour

Contact Info

Product

Resources

About